AMERICAN PACIFIC CORP
8-A12B, 1999-08-06
INDUSTRIAL INORGANIC CHEMICALS
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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                           ---------------------------


                                    FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                    PURSUANT TO SECTION 12(b) OR 12(g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                          AMERICAN PACIFIC CORPORATION
- --------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Its Charter)

                Delaware                                 59-6490478
- --------------------------------------------------------------------------------
(State of Incorporation or Organization)    (I.R.S. Employer Identification no.)

3770 Howard Hughes Parkway, Suite 300, Las Vegas, Nevada          89101
- --------------------------------------------------------------------------------
(Address of Principal Executive Offices)                         (Zip Code)

If this form relates to the  registration  of a class of securities  pursuant to
Section  12(b)  of  the  Exchange  Act  and is  effective  pursuant  to  General
Instruction  A.(c),  please check the following box. /X/

If this form relates to the  registration  of a class of securities  pursuant to
Section  12(g)  of  the  Exchange  Act  and is  effective  pursuant  to  General
Instruction A.(d), please check the following box. / /

Securities Act registration statement file number to which this form relates:

Securities to be registered pursuant to Section 12(b) of the Act:


           Title of each class               Name of Each Exchange on Which Each
           to be so registered                      Class is to be Registered
           -------------------               -----------------------------------
     Preference Share Purchase Rights               Nasdaq National Market

Securities to be registered pursuant to Section 12(g) of the Act:

- --------------------------------------------------------------------------------
                                (Title of Class)

- --------------------------------------------------------------------------------
                                (Title of Class)

<PAGE>
Item 1.           Description of Securities To Be Registered.

                  On August 3, 1999, the Board of Directors of American  Pacific
Corporation (the "Company") declared a dividend of one preference share purchase
right (a "Right") for each  outstanding  share of common stock,  par value $ .10
per share (the  "Common  Shares"),  of the  Company.  The dividend is payable to
stockholders  of record on August  16,  1999 (the  "Record  Date").  Each  Right
entitles the registered holder to purchase from the Company one one-hundredth of
a share of Series D Preference Stock, par value $1.00 per share (the "Preference
Shares"),  of the  Company  at a price  of  $24.00  per one  one-hundredth  of a
Preference  Share (the "Purchase  Price"),  subject to adjustment  under certain
circumstances. The description and terms of the Rights are set forth in a Rights
Agreement  (the  "Rights  Agreement"),  dated as of August 3, 1999,  between the
Company  and  American  Stock  Transfer & Trust  Company,  as Rights  Agent (the
"Rights Agent").

                  Until the  earlier to occur of (i) 10 days  following a public
announcement  that a person or group of  affiliated  or  associated  persons (an
"Acquiring  Person")  has  acquired  beneficial  ownership of 20% or more of the
outstanding Common Shares,  except pursuant to a Permitted Offer or a Qualifying
Offer (each as defined in the Rights  Agreement),  or (ii) 10 business  days (or
such later date as may be determined  by action of the Board of Directors  prior
to such time as any person or group of affiliated  persons  becomes an Acquiring
Person)  following the commencement of, or announcement of an intention to make,
a tender offer or exchange offer the  consummation  of which would result in the
beneficial  ownership  by a person  or  group of 20% or more of the  outstanding
Common Shares (the earlier of such dates being called the "Distribution  Date"),
the  Rights  will  be  evidenced,  with  respect  to  any of  the  Common  Share
certificates outstanding as of the Record Date, by such Common Share certificate
(which certificates shall also be deemed Rights certificates).

                  The Rights  Agreement  provides that,  until the  Distribution
Date (or earlier  redemption or  expiration  of the Rights),  the Rights will be
transferred  with and only with the Common  Shares.  Common  Share  certificates
issued  after the Record  Date but prior to the  Distribution  Date (or  earlier
redemption or  expiration  of the Rights) upon transfer or original  issuance of
Common  Shares will  contain a notation  incorporating  the Rights  Agreement by
reference.  Until the Distribution Date (or earlier  redemption or expiration of
the Rights),  the surrender for transfer of any  certificates  for Common Shares
outstanding  as of the Record Date,  even without such notation or a copy of the
Summary of Rights being attached  thereto,  will also constitute the transfer of
the Rights associated with the Common Shares represented by such certificate. As
soon as  practicable  following the  Distribution  Date,  separate  certificates
evidencing  the Rights (the "Right  Certificates")  will be mailed to holders of
record of the Common Shares as of the close of business on the Distribution Date
and such separate Right Certificates alone will evidence the Rights.


                                       -2-

<PAGE>
                  The Rights are not exercisable  until the  Distribution  Date.
The Rights will expire on August 2, 2009 (the "Final Expiration  Date"),  unless
the Final  Expiration Date is extended or unless the Rights are earlier redeemed
or exchanged by the Company, in each case, as described below.

                  In the  event  that  any  person  or group  of  affiliated  or
associated persons becomes an Acquiring Person, proper provision will be made so
that  each  holder  of a Right,  other  than  Rights  beneficially  owned by the
Acquiring Person (which will thereafter be void), will thereafter have the right
to receive upon  exercise  that number of Common Shares having a market value of
two times the exercise price of the Right.  However,  Rights are not exercisable
following  the  occurrence  of the event set forth  above until such time as the
Rights are no longer redeemable by the Company.

                  For example, at an exercise price of $24 per Right, each Right
not owned by an Acquiring Person (or related party) following an event set forth
in the  preceding  paragraph  would  entitle its holder to purchase $48 worth of
Common  Shares for $24.  Assuming that the Common Stock had a per share value of
$12 at such time, the holder of each valid Right would be entitled to purchase 4
shares of Common Stock for $24.

                  In the event that the Company is acquired in a merger or other
business  combination  transaction or 50% or more of its consolidated  assets or
earning  power are sold after a person or group has become an Acquiring  Person,
proper  provision  will be made so that each  holder of a Right will  thereafter
have the  right  to  receive,  upon the  exercise  thereof  at the then  current
exercise  price of the  Right,  that  number of  shares  of common  stock of the
acquiring company which at the time of such transaction will have a market value
of two times the exercise price of the Right.

                  The  Purchase  Price  payable,  and the  number of  Preference
Shares or other securities or property issuable, upon exercise of the Rights are
subject to adjustment from time to time to prevent  dilution (i) in the event of
a stock dividend on, or a subdivision,  combination or reclassification  of, the
Preference  Shares,  (ii) upon the grant to holders of the Preference  Shares of
certain rights or warrants to subscribe for or purchase  Preference  Shares at a
price, or securities convertible into Preference Shares with a conversion price,
less than the then-current  market price of the Preference  Shares or (iii) upon
the   distribution  to  holders  of  the  Preference   Shares  of  evidences  of
indebtedness or assets  (excluding  regular  periodic cash dividends paid out of
earnings or retained earnings or dividends  payable in Preference  Shares) or of
subscription rights or warrants (other than those referred to above).

                  The  number  of  outstanding  Rights  and  the  number  of one
one-hundredths  of a Preference  Share  issuable upon exercise of each Right are
also subject to adjustment in the event of a stock split of the Common Shares or
a stock dividend on the Common Shares payable in Common Shares or  subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case,
prior to the Distribution Date.

                  Preference Shares purchasable upon exercise of the Rights will
not  be  redeemable.  Each  Preference  Share  will  be  entitled  to a  minimum
preferential quarterly dividend payment of $1

                                       -3-

<PAGE>
per  share  but will be  entitled  to an  aggregate  dividend  of 100  times the
dividend declared per Common Share. In the event of liquidation,  the holders of
the  Preference  Shares will be entitled to a minimum  preferential  liquidation
payment of $100 per share but will be  entitled to an  aggregate  payment of 100
times the payment made per Common  Share.  Each  Preference  Share will have 100
votes,  voting  together with the Common  Shares.  Finally,  in the event of any
merger, consolidation or other transaction in which Common Shares are exchanged,
each Preference  Share will be entitled to receive 100 times the amount received
per  Common  Share.  These  rights  are  protected  by  customary   antidilution
provisions.

                  Because  of the  nature of the  Preference  Shares'  dividend,
liquidation and voting rights, the value of the one one-hundredth  interest in a
Preference Share purchasable upon exercise of each Right should  approximate the
value of one Common Share.

                  At any time  after any person or group  becomes  an  Acquiring
Person and prior to the  acquisition  by such  person or group of 50% or more of
the  outstanding  Common  Shares,  the Board of  Directors  of the  Company  may
exchange the Rights (other than Rights owned by such person or group, which will
have  become  void),  in whole or in part,  at an  exchange  ratio of one Common
Share, or one  one-hundredth  of a Preference Share (or of a share of a class or
series of the Company's  preference stock having equivalent rights,  preferences
and privileges), per Right (subject to adjustment).

                  With certain  exceptions,  no adjustment in the Purchase Price
will be required until cumulative  adjustments require an adjustment of at least
1% in such Purchase Price. No fractional Preference Shares will be issued (other
than fractions which are integral multiples of one one-hundredth of a Preference
Share,  which may, at the  election of the Company,  be evidenced by  depositary
receipts) and in lieu  thereof,  an adjustment in cash will be made based on the
market price of the Preference  Shares on the last trading day prior to the date
of exercise.

                  At any time prior to the  acquisition  by a person or group of
affiliated or associated  persons of beneficial  ownership of 20% or more of the
outstanding  Common Shares, and for a 10 day period (subject to extension for up
to an additional 10 days) thereafter,  the Board of Directors of the Company may
redeem the Rights in whole,  but not in part, at a price of $.001 per Right (the
"Redemption  Price"). The redemption of the Rights may be made effective at such
time on such basis with such  conditions  as the Board of  Directors in its sole
discretion may  establish.  Immediately  upon any redemption of the Rights,  the
right to exercise the Rights will terminate and the only right of the holders of
Rights will be to receive the Redemption Price.

                  The  terms  of the  Rights  may be  amended  by the  Board  of
Directors  of the  Company  without  the  consent of the  holders of the Rights,
except  that from and after  such time as any person or group of  affiliated  or
associated  persons becomes an Acquiring  Person no such amendment may adversely
affect the interests of the holders of the Rights.


                                       -4-

<PAGE>
                  Until a Right is exercised,  the holder thereof, as such, will
have no rights as a stockholder of the Company,  including,  without limitation,
the right to vote or to receive dividends.

                  The Rights have certain anti-takeover effects. The Rights will
cause  substantial  dilution  to a person or group that  attempts to acquire the
Company  on terms not  approved  by the  Company's  Board of  Directors,  except
pursuant  to an offer  conditioned  on a  substantial  number  of  Rights  being
acquired.  The Rights  should not  interfere  with any merger or other  business
combination  approved  by the Board of  Directors  ,  because  the Rights may be
redeemed by the Company at the Redemption  Price prior to the time that a person
or group has acquired beneficial ownership of 20% or more of the Common Shares.

Item 2.           Exhibits.

                  1.       Rights  Agreement,   dated  as  of  August  3,  1999,
                           American  Pacific   Corporation  and  American  Stock
                           Transfer & Trust Company  which  includes the Form of
                           Certificate of Designation setting forth the terms of
                           the Series D Preference  Stock,  par value $ 1.00 per
                           share, as Exhibit A, the form of Right Certificate as
                           Exhibit  B and the  Summary  of  Rights  to  Purchase
                           Preference Shares as Exhibit C.*

                           Pursuant  to  the  Rights  Agreement,  printed  Right
                           Certificates  will  not be  mailed  until  as soon as
                           practicable  after the earlier of the tenth  business
                           day after public  announcement that a person or group
                           has acquired  beneficial  ownership of 20% or more of
                           the Common Shares or the tenth  business day (or such
                           later  date as may be  determined  by  action  of the
                           Board  of  Directors)  after a person  commences,  or
                           announces its  intention to commence,  a tender offer
                           or  exchange  offer the  consummation  of which would
                           result  in the  beneficial  ownership  by a person or
                           group of 20% or more of the Common Shares.

                  2.       Form  of  Letter  from  the  Board  of  Directors  of
                           American  Pacific  Corporation to  Stockholders to be
                           mailed with copies of the Summary of Rights appearing
                           as Exhibit C to Exhibit 1 hereto.

                                       -5-

<PAGE>
                                    SIGNATURE

                  Pursuant to the  requirements  of Section 12 of the Securities
Exchange Act of 1934, the registrant has duly caused this registration statement
to be signed on its behalf by the undersigned, thereto duly authorized.

Dated: August 5, 1999                AMERICAN PACIFIC CORPORATION



                                       By: /s/ David N. Keys
                                           -------------------------------------
                                       Name:   David N. Keys
                                       Title:  Executive Vice President


                                       -6-


                          AMERICAN PACIFIC CORPORATION


                                       and


                   AMERICAN STOCK TRANSFER & TRUST COMPANY, as

                                  Rights Agent


                                Rights Agreement

                           Dated as of August 3, 1999


          ------------------------------------------------------------




<PAGE>
                  Agreement,  dated  as of  August  3,  1999,  between  American
Pacific Corporation,  a Delaware corporation (the "Company"), and American Stock
Transfer & Trust Company (the "Rights Agent").

                  The Board of  Directors  of the  Company  has  authorized  and
declared a dividend of one preference  share purchase right (a "Right") for each
Common Share (as hereinafter  defined) of the Company  outstanding on August 16,
1999 (the  "Record  Date"),  each Right  representing  the right to purchase one
one-hundredth of a Preference Share (as hereinafter defined), upon the terms and
subject to the  conditions  herein set forth,  and has  further  authorized  and
directed  the issuance of one Right with respect to each Common Share that shall
become outstanding  between the Record Date and the earliest of the Distribution
Date,  the  Redemption  Date and the Final  Expiration  Date (as such  terms are
hereinafter defined).

                  Accordingly,  in  consideration of the premises and the mutual
agreements herein set forth, the parties hereby agree as follows:

                  Section  1.   Certain   Definitions.   For  purposes  of  this
Agreement, the following terms have the meanings indicated:

                  (a) "Acquiring  Person" shall mean any Person (as such term is
hereinafter  defined) who or which,  together with all Affiliates and Associates
(as such terms are hereinafter  defined) of such Person,  after the date hereof,
shall become the Beneficial  Owner (as such term is hereinafter  defined) of 20%
or more of the Common  Shares of the Company then  outstanding  (other than as a
result of a Permitted Offer (as hereinafter  defined) or a Qualifying  Offer (as
hereinafter defined), but shall not include the Company, any Subsidiary (as such
term is hereinafter  defined) of the Company,  any employee  benefit plan of the
Company or of any Subsidiary of the Company, or any entity holding Common Shares
for or pursuant to the terms of any such plan.

         Notwithstanding the foregoing, (i) no Person shall become an "Acquiring
Person" as the result of a purchase of Common  Shares by the Company  which,  by
reducing the number of shares outstanding, increases the proportionate number of
shares  beneficially owned by such Person to 20% or more of the Common Shares of
the Company then outstanding;  provided,  however, that if a Person shall become
the  Beneficial  Owner of 20% or more of the Common  Shares of the Company  then
outstanding by reason of a share  purchase by the Company and shall,  after such
share  purchase by the Company,  become the  Beneficial  Owner of any additional
Common  Shares  of the  Company,  then  such  Person  shall be  deemed  to be an
"Acquiring Person"; and (ii) if the Board of Directors of the Company determines
in good faith that a Person who would  otherwise  be an  "Acquiring  Person," as
defined  pursuant to the foregoing  provisions of this paragraph (a), has become
such  inadvertently,  and such  Person  divests as  promptly  as  practicable  a
sufficient  number of Common  Shares so that such  Person  would no longer be an
"Acquiring  Person," as defined  pursuant to the  foregoing  provisions  of this
paragraph (a), then such Person shall not be deemed to be an "Acquiring  Person"
for any purposes of this Agreement.


                                       -2-

<PAGE>
                  (b)  "Affiliate"  and  "Associate"  shall have the  respective
meanings  ascribed  to such  terms  in  Rule  12b-2  of the  General  Rules  and
Regulations under the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), as in effect on the date of this Agreement.

                  (c) A Person  shall be deemed  the  "Beneficial  Owner" of and
shall be deemed to "beneficially own" any securities:

                           (i)  that  such  Person  or  any  of  such   Person's
                  Affiliates  or  Associates   beneficially  owns,  directly  or
                  indirectly;

                           (ii)  that  such  Person  or  any  of  such  Person's
                  Affiliates or Associates has (A) the right to acquire (whether
                  such  right  is  exercisable  immediately  or only  after  the
                  passage of time)  pursuant to any  agreement,  arrangement  or
                  understanding   (other  than  customary  agreements  with  and
                  between underwriters and selling group members with respect to
                  a bona  fide  public  offering  of  securities),  or upon  the
                  exercise of conversion rights,  exchange rights, rights (other
                  than  these  Rights),   warrants  or  options,  or  otherwise;
                  provided,  however,  that a Person  shall  not be  deemed  the
                  Beneficial  Owner  of,  or  to  beneficially  own,  securities
                  tendered  pursuant to a tender or exchange offer made by or on
                  behalf of such Person or any of such  Person's  Affiliates  or
                  Associates  until such  tendered  securities  are accepted for
                  purchase or exchange; or (B) the right to vote pursuant to any
                  agreement,  arrangement or understanding;  provided,  however,
                  that a Person shall not be deemed the Beneficial  Owner of, or
                  to beneficially  own, any security pursuant to this clause (B)
                  if the agreement,  arrangement or  understanding  to vote such
                  security (1) arises  solely from a revocable  proxy or consent
                  given to such Person in response to a public  proxy or consent
                  solicitation  made  pursuant to, and in accordance  with,  the
                  applicable  rules  and  regulations   promulgated   under  the
                  Exchange Act and (2) is not also then  reportable  on Schedule
                  13D under the  Exchange  Act (or any  comparable  or successor
                  report); or

                  (iii) which are beneficially owned, directly or indirectly, by
                  any  other  Person  with  which  such  Person  or any of  such
                  Person's   Affiliates   or  Associates   has  any   agreement,
                  arrangement or understanding  (other than customary agreements
                  with and between  underwriters  and selling group members with
                  respect to a bona fide public  offering of securities) for the
                  purpose of acquiring,  holding,  voting  (except to the extent
                  contemplated  by  the  proviso  to  Section   1(c)(ii)(B))  or
                  disposing of any securities of the Company.

                  Notwithstanding  anything  in this  definition  of  Beneficial
Ownership  to the  contrary,  the  phrase  "then  outstanding,"  when  used with
reference to a Person's Beneficial Ownership of securities of the Company, shall
mean the number of such securities then issued and outstanding together with the
number of such securities not then actually  issued and  outstanding  which such
Person would be deemed to own beneficially hereunder.

                                       -3-

<PAGE>
                  (d) "Business Day" shall mean any day other than a Saturday, a
Sunday,  or a day on which  banking  institutions  in the  State of New York are
authorized or obligated by law or executive order to close.

                  (e)  "Close of  Business"  on any given  date  shall mean 5:00
P.M., Eastern time, on such date; provided,  however, that if such date is not a
Business  Day it shall  mean 5:00 P.M.,  Eastern  time,  on the next  succeeding
Business Day.

                  (f) "Common  Shares"  when used with  reference to the Company
shall mean the shares of common stock, par value $.10 per share, of the Company.
"Common  Shares"  when used with  reference to any Person other than the Company
shall mean the capital stock (or equity interest) with the greatest voting power
of such other Person or, if such other Person is a Subsidiary of another Person,
the Person or Persons which ultimately control such first-mentioned Person.

                  (g)  "Distribution  Date"  shall have the meaning set forth in
Section 3 hereof.

                  (h) "Final  Expiration  Date" shall have the meaning set forth
in Section 7 hereof.

                  (i)  "Permitted  Offer" shall mean a tender or exchange  offer
that is for all  outstanding  Common Shares at a price and on terms  determined,
prior to the purchase of shares under such tender or exchange offer, by at least
a majority of the members of the Board of  Directors  of the Company who are not
officers of the Company and who are not  Acquiring  Persons or Persons who would
become  Acquiring  Persons as a result of the offer in question  or  Affiliates,
Associates,  nominees  or  representatives  of any such  Person,  to be adequate
(taking into account all factors that such  Directors  deem relevant  including,
without  limitation,  prices that could reasonably be achieved if the Company or
its assets were sold on an orderly basis designed to realize  maximum value) and
otherwise in the best interests of the Company and its stockholders  (other than
the Person or any  Affiliate or  Associate  thereof on whose behalf the offer is
being  made)  taking  into  account all  factors  that such  directors  may deem
relevant.

                  (j) "Person" shall mean any individual,  firm,  corporation or
other  entity,  and shall include any successor (by merger or otherwise) of such
entity.

                  (k)  "Preference   Shares"  shall  mean  shares  of  Series  D
Participating  Preference  Stock,  $1.00 par value,  of the  Company  having the
rights and  preferences  set forth in the Form of  Certificate  of  Designations
attached to this Agreement as Exhibit A.

                  (l)  "Purchase  Price"  shall  have the  meaning  set forth in
Section 4 hereof,  as the same may be adjusted  from time to time in  accordance
with the terms of this Agreement.

                  (m)"Qualifying  Offer" shall mean an offer for all outstanding
Common Shares which meets all of the following requirements:


                                       -4-

<PAGE>
                           (i) the  consideration  offered shall be all cash and
                  such  consideration  shall be equal for all  holders of Common
                  Shares;

                           (ii) on or  prior  to the  date  that  such  offer is
                  commenced  within the meaning of Rule  14d-2(a) of the General
                  Rules   and   Regulations   under   the   Exchange   Act  (the
                  "Commencement  Date"),  the Board of  Directors of the Company
                  has  received  an  opinion   from  a   nationally   recognized
                  investment  banking firm  designated by the Board of Directors
                  of the Company  (x) that the Person or group  making the offer
                  has the  capability  under then  prevailing  conditions in the
                  credit  markets  to obtain  funds  sufficient  to pay the cash
                  consideration  for all Common  Shares  outstanding  on a fully
                  diluted basis together with all related expenses in accordance
                  with the  financing  plan  therefor  set forth in the Schedule
                  14D-1  filed by such Person or group in  connection  with such
                  offer and (y) stating  that the price to be paid to holders of
                  Common  Shares  pursuant to the offer is fair from a financial
                  point  of  view  to  such  holders  and  otherwise  meets  the
                  requirements of a Qualifying Offer as defined herein; ;

                           (iii)  such  offer  shall be in  compliance  with all
                  applicable  laws (the  "Applicable  Laws"),  including but not
                  limited to the Exchange Act, state or foreign laws relating to
                  takeovers,   state   securities   or  blue   sky   laws,   the
                  Hart-Scott-Rodino  Antitrust  Improvements  Act  of  1976,  as
                  amended,  the Defense  Production Act of 1950 and the Delaware
                  General Corporation Law, in connection with such offer and the
                  consummation thereof;

                           (iv)   such   Person  or  group   must   own,   after
                  consummating  such offer,  a majority of the then  outstanding
                  Common Shares of the Company;

                           (v)  the   consideration   per  share  being  offered
                  pursuant  to  such  offer  shall  have,  on  the  date  of the
                  commencement of the offer, (x) a market value  representing at
                  least  the  greater  of (A) a 30%  premium  over  the  average
                  closing sales price of a Common Share for the 45 business days
                  prior  to  the  Record  Date  as  reported  on  the   national
                  securities exchange or automated quotation system on which the
                  Common  Shares are  traded,  or if the  Common  Shares are not
                  traded  on  a  national   securities   exchange  or  automated
                  quotation  system,  the  average of the last asked  price of a
                  Common  Share  in  the  over-the-counter  market  for  the  45
                  business  days prior to the  Record  Date and (B) 30% over the
                  average  closing  sales  price  of a Common  Share  for the 45
                  business  days  prior  to the  date on  which  such  offer  is
                  announced,  as reported on the national securities exchange or
                  automated  quotation  system on which the  Common  Shares  are
                  traded,  or if the Common  Shares are not traded on a national
                  securities exchange or automated quotation system, the average
                  of  the  last   asked   prices  of  a  Common   Share  in  the
                  over-the-counter  market for the 45 business days prior to the
                  date on which such offer is  announced  and (y) a fair  market
                  value (as  determined  in good faith by the Board of Directors
                  of the Company) at least equal to the greatest amount of

                                       -5-

<PAGE>
                  consideration  paid for any  Common  Shares  purchased  by the
                  Person or group making the offer  within the  two-year  period
                  prior to the Commencement Date;

                           (vi) such offer remains open for at least 60 Business
                  Days; provided,  however, that (x) if there is any increase in
                  the price of such  offer,  such offer must  remain open for at
                  least an  additional  20  Business  Days  after  the last such
                  increase,  (y) such  offer  must  remain  open for at least 10
                  Business  Days  after the date that any bona fide  alternative
                  offer is made which, in the opinion of a nationally recognized
                  investment  banking firm  designated by the Board of Directors
                  of the Company, provides for consideration per share in excess
                  of that  provided  for in such offer,  and (z) such offer must
                  remain  open for at least 10  Business  Days after the date on
                  which  such  Person  reduces  the per share  price  offered in
                  accordance  with  clause  (vii)(y)  below;  provided  further,
                  however,  that such offer need not remain open, as a result of
                  this  clause  (vi),  beyond (A) the time that any other  offer
                  satisfying  the  criteria  for  a  Qualifying  Offer  is  then
                  required  to be kept open under this clause  (vi),  or (B) the
                  scheduled  expiration  date,  as such date may be  extended by
                  public   announcement  on  or  prior  to  the  then  scheduled
                  expiration  date,  of any other tender offer for Common Shares
                  with  respect to which the Board of  Directors  of the Company
                  has  agreed  to  redeem  the  Rights   immediately   prior  to
                  acceptance  for payment of Common  Shares  thereunder  (unless
                  such other offer is terminated prior to its expiration without
                  any Common Shares having been purchased thereunder); and

                           (vii) prior to the Commencement  Date, such Person or
                  group makes an irrevocable  written  commitment to the Company
                  (x) to consummate a transaction or transactions  promptly upon
                  the  completion  of such offer,  whereby all Common Shares not
                  purchased in such offer will be acquired at the same price per
                  share paid in such offer,  subject only to the condition  that
                  the Board of Directors  of the Company  shall have granted any
                  approvals  required to enable such Person to  consummate  such
                  transaction or  transactions  following  consummation  of such
                  offer without obtaining the vote of any other stockholder, (y)
                  that such  person  will not make any  amendment  to such offer
                  that  reduces  the  per  share  price  offered  (other  than a
                  reduction  to reflect  any  dividend  declared  by the Company
                  after the commencement of such offer or any material change in
                  the capital  structure of the Company initiated by the Company
                  after  the  commencement  of  such  offer,  whether  by way of
                  recapitalization,  reorganization,  repurchase or  otherwise),
                  changes  the form of  consideration  offered,  or reduces  the
                  number of shares  being  sought  or that is  otherwise  in any
                  other   respect    materially   adverse   to   the   Company's
                  stockholders,  and (z) that neither such Person nor any of its
                  Affiliates  or  Associates  will make any other  offer for any
                  equity  securities  of the  Company for a period of six months
                  after the  commencement of the original offer if such original
                  offer  does not  result in the  tender of the number of Common
                  Shares  required  to be  purchased  pursuant  to clause  (iii)
                  above,  unless  another  tender offer by another party for all
                  outstanding  Common Shares is commenced (A) at a consideration
                  per share (as determined by a nationally

                                       -6-

<PAGE>
                  recognized  investment banking firm designated by the Board of
                  Directors  of the  Company) in excess of that  provided for in
                  such  original  offer  (in  which  event any new offer by such
                  Person or any of its  Affiliates  or  Associates  must be at a
                  consideration  (as  determined  by  a  nationally   recognized
                  investment  banking firm  designated by the Board of Directors
                  of the Company) no less than that  provided for in such higher
                  offer),  or (B) with the approval of the Board of Directors of
                  the Company (in which event any new offer by such Person or of
                  any of its Affiliates or Associates must be at a price no less
                  than that provided for in such approved offer).

                  (n)  "Redemption  Date"  shall have the  meaning  set forth in
Section 7 hereof.

                  (o)  "Shares  Acquisition  Date"  shall mean the first date of
public  announcement  by the Company or an  Acquiring  Person that an  Acquiring
Person has become such.

                  (p)  "Subsidiary"  of any Person shall mean any corporation or
other  entity of which a  majority  of the  voting  power of the  voting  equity
securities or equity interest is owned, directly or indirectly, by such Person.

                  (q) "Trading  Day" shall have the meaning set forth in Section
11 hereof.

                  Certain  additional  terms  used  wholly  within a  subsequent
Section of this  Agreement  shall have the meaning given to them in the relevant
Section of this Agreement for purposes of such Section.

                  Section 2.  Appointment  of Rights Agent.  The Company  hereby
appoints the Rights Agent to act as agent for the Company and the holders of the
Rights  (who,  in  accordance  with  Section  3  hereof,   shall  prior  to  the
Distribution  Date also be the holders of the Common Shares) in accordance  with
the terms and  conditions  hereof,  and the Rights  Agent  hereby  accepts  such
appointment.  The Company may from time to time appoint such co-Rights Agents as
it may deem necessary or desirable.

                  Section 3. Issue of Right Certificates.  (a) Until the earlier
of (i) the tenth  Business  Day after the  Shares  Acquisition  Date or (ii) the
tenth  Business  Day (or such later date as may be  determined  by action of the
Board of  Directors of the Company  prior to such time as any Person  becomes an
Acquiring  Person) after the date of the  commencement by any Person (other than
the Company,  any  Subsidiary of the Company,  any employee  benefit plan of the
Company or of any  Subsidiary of the Company or any entity holding Common Shares
for or  pursuant  to the terms of any such  plan)  of,  or of the  first  public
announcement  of the  intention  of any  Person  (other  than the  Company,  any
Subsidiary  of the Company,  any employee  benefit plan of the Company or of any
Subsidiary of the Company or any entity holding Common Shares for or pursuant to
the  terms of any such  plan)  to  commence,  a tender  or  exchange  offer  the
consummation of which would result in any Person  becoming the Beneficial  Owner
of Common Shares  aggregating 20% or more of the then outstanding  Common Shares
(including any such date which is after the date of this Agreement and

                                       -7-

<PAGE>
prior to the  issuance  of the Rights;  the  earlier of such dates being  herein
referred  to as the  "Distribution  Date"),  (x) the  Rights  will be  evidenced
(subject to the  provisions  of Section  3(b)  hereof) by the  certificates  for
Common Shares registered in the names of the holders thereof (which certificates
shall  also be  deemed  to be  Right  Certificates)  and not by  separate  Right
Certificates,   and  (y)  the  right  to  receive  Right  Certificates  will  be
transferable  only in connection with the transfer of Common Shares.  As soon as
practicable  after the Distribution  Date, the Company will prepare and execute,
the Rights Agent will countersign, and the Company will send or cause to be sent
(and the  Rights  Agent  will,  if  requested,  send) by  first-class,  insured,
postage-prepaid  mail, to each record holder of Common Shares as of the Close of
Business on the  Distribution  Date,  at the address of such holder shown on the
records  of the  Company,  a Right  Certificate,  in  substantially  the form of
Exhibit B hereto (a "Right  Certificate"),  evidencing one Right for each Common
Share so held. As of the Distribution  Date, the Rights will be evidenced solely
by such Right Certificates.

                  (b) On the Record Date, or as soon as practicable  thereafter,
the  Company  will send a copy of a Summary  of  Rights to  Purchase  Preference
Shares, in substantially the form of Exhibit C hereto (the "Summary of Rights"),
by first-class,  postage-prepaid mail, to each record holder of Common Shares as
of the Close of Business on the Record Date, at the address of such holder shown
on the records of the Company.  With respect to  certificates  for Common Shares
outstanding as of the Record Date, until the Distribution  Date, the Rights will
be  evidenced  by such  certificates  registered  in the  names  of the  holders
thereof. Until the earliest of the Distribution Date, the Redemption Date or the
Final  Expiration Date, the surrender for transfer of any certificate for Common
Shares  outstanding on the Record Date, with or without a copy of the Summary of
Rights  attached  thereto,  shall also  constitute  the  transfer  of the Rights
associated with the Common Shares represented thereby.

                  (c) Certificates for Common Shares that are issued (including,
without limitation, reacquired Common Shares referred to in the last sentence of
this  paragraph  (c)) after the  Record  Date but prior to the  earliest  of the
Distribution  Date, the Redemption Date or the Final  Expiration Date shall have
impressed on, printed on, written on or otherwise  affixed to them the following
legend:

                  This certificate also evidences and entitles the holder hereof
                  to certain rights as set forth in a Rights  Agreement  between
                  American  Pacific  Corporation  and American  Stock Transfer &
                  Trust  Company,  dated  as of  August  3,  1999  (the  "Rights
                  Agreement"), the terms of which are hereby incorporated herein
                  by reference  and a copy of which is on file at the  principal
                  executive  offices  of  American  Pacific  Corporation.  Under
                  certain  circumstances,  as set forth in the Rights Agreement,
                  such Rights will be  evidenced  by separate  certificates  and
                  will no  longer be  evidenced  by this  certificate.  American
                  Pacific   Corporation   will  mail  to  the   holder  of  this
                  certificate  a copy of the  Rights  Agreement  without  charge
                  after  receipt of a written  request  therefor.  Under certain
                  circumstances,  as set forth in the Rights  Agreement,  Rights
                  issued to any  Person  who  becomes  an  Acquiring  Person (as
                  defined in the Rights Agreement) may become null and void. The
                  Rights shall not be exercisable

                                       -8-

<PAGE>
                  by  a  holder  in  any   jurisdiction   where  the   requisite
                  qualification for the issuance to such holder of the Rights in
                  such jurisdiction shall not have been obtained or obtainable.

                  With respect to such  certificates  containing  the  foregoing
legend,  until the  Distribution  Date,  the Rights  associated  with the Common
Shares  represented by such certificates shall be evidenced by such certificates
alone,  and the  surrender  for  transfer  of any such  certificate  shall  also
constitute  the  transfer  of the  Rights  associated  with  the  Common  Shares
represented  thereby.  In the event that the Company  purchases  or acquires any
Common  Shares  after the Record Date but prior to the  Distribution  Date,  any
Rights  associated  with such Common Shares shall be deemed canceled and retired
so that the Company shall not be entitled to exercise any Rights associated with
the Common Shares which are no longer outstanding.

                  Section 4. Form of Right Certificates.  The Right Certificates
(and the forms of election to purchase Preference Shares and of assignment to be
printed on the reverse  thereof)  shall be  substantially  the same as Exhibit B
hereto  and may  have  such  marks of  identification  or  designation  and such
legends,  summaries  or  endorsements  printed  thereon as the  Company may deem
appropriate and as are not  inconsistent  with the provisions of this Agreement,
or as may be  required  to comply  with any  applicable  law or with any rule or
regulation  made  pursuant  thereto or with any rule or  regulation of any stock
exchange or automated quotation system on which the Rights may from time to time
be  traded,  or to conform to usage.  Subject  to the  provisions  of Section 22
hereof,  the Right  Certificates  shall entitle the holders  thereof to purchase
such number of one  one-hundredths  of a Preference  Share as shall be set forth
thereon  at the  price per one  one-hundredth  of a  Preference  Share set forth
therein (the "Purchase  Price"),  but the number of such one one-hundredths of a
Preference  Share and the  Purchase  Price  shall be  subject to  adjustment  as
provided herein.

                  Section  5.  Countersignature  and  Registration.   The  Right
Certificates  shall be executed on behalf of the Company by its  Chairman of the
Board, its Chief Executive Officer,  its President,  any of its Vice Presidents,
or its Treasurer,  either manually or by facsimile signature, shall have affixed
thereto the Company's seal or a facsimile thereof,  and shall be attested by the
Secretary  or an  Assistant  Secretary  of the  Company,  either  manually or by
facsimile signature.  The Right Certificates shall be manually  countersigned by
the Rights Agent and shall not be valid for any purpose unless so countersigned.
In case any  officer  of the  Company  who shall  have  signed  any of the Right
Certificates   shall   cease  to  be  such   officer  of  the   Company   before
countersignature  by the Rights  Agent and issuance and delivery by the Company,
such Right Certificates,  nevertheless, may be countersigned by the Rights Agent
and issued and delivered by the Company with the same force and effect as though
the person who signed such Right  Certificates had not ceased to be such officer
of the Company; and any Right Certificate may be signed on behalf of the Company
by  any  person  who,  at the  actual  date  of  the  execution  of  such  Right
Certificate,  shall  be a proper  officer  of the  Company  to sign  such  Right
Certificate,  although at the date of the execution of this Rights Agreement any
such person was not such an officer.


                                       -9-

<PAGE>
                  Following the Distribution Date, the Rights Agent will keep or
cause to be kept, at its principal  office,  books for registration and transfer
of the Right Certificates issued hereunder.  Such books shall show the names and
addresses of the  respective  holders of the Right  Certificates,  the number of
Rights  evidenced on its face by each of the Right  Certificates and the date of
each of the Right Certificates.

                  Section 6.  Transfer,  Split Up,  Combination  and Exchange of
Right  Certificates;  Mutilated,  Destroyed,  Lost or Stolen Right Certificates.
Subject to the  provisions of Section 14 hereof,  at any time after the Close of
Business on the  Distribution  Date, and at or prior to the Close of Business on
the  earlier of the  Redemption  Date or the Final  Expiration  Date,  any Right
Certificate or Right Certificates  (other than Right  Certificates  representing
Rights that have become void pursuant to Section  11(a)(ii)  hereof or that have
been  exchanged  pursuant  to Section 24 hereof) may be  transferred,  split up,
combined or  exchanged  for another  Right  Certificate  or Right  Certificates,
entitling the registered holder to purchase a like number of one  one-hundredths
of a Preference Share as the Right Certificate or Right Certificates surrendered
then  entitled  such  holder to  purchase.  Any  registered  holder  desiring to
transfer,  split  up,  combine  or  exchange  any  Right  Certificate  or  Right
Certificates  shall make such request in writing  delivered to the Rights Agent,
and  shall  surrender  the  Right  Certificate  or  Right   Certificates  to  be
transferred,  split up,  combined or  exchanged at the  principal  office of the
Rights Agent.  Thereupon the Rights Agent shall  countersign  and deliver to the
person entitled thereto a Right Certificate or Right  Certificates,  as the case
may be, as so requested.  The Company may require payment of a sum sufficient to
cover any tax or governmental  charge that may be imposed in connection with any
transfer, split up, combination or exchange of Right Certificates.  Upon receipt
by the Company and the Rights Agent of evidence reasonably  satisfactory to them
of the loss, theft,  destruction or mutilation of a Right  Certificate,  and, in
case of  loss,  theft  or  destruction,  of  indemnity  or  security  reasonably
satisfactory  to them,  and,  at the  Company's  request,  reimbursement  to the
Company and the Rights Agent of all reasonable expenses incidental thereto,  and
upon surrender to the Rights Agent and cancellation of the Right  Certificate if
mutilated,  the Company  will make and deliver a new Right  Certificate  of like
tenor to the Rights Agent for delivery to the  registered  holder in lieu of the
Right Certificate so lost, stolen, destroyed or mutilated.

                  Section 7. Exercise of Rights; Purchase Price; Expiration Date
of Rights.  (a) The registered  holder of any Right Certificate may exercise the
Rights  evidenced  thereby (except as otherwise  provided herein) in whole or in
part at any time  after  the  Distribution  Date  upon  surrender  of the  Right
Certificate,  with the form of election to purchase on the reverse  side thereof
duly executed,  to the Rights Agent at the principal office of the Rights Agent,
together  with payment of the  Purchase  Price for each one  one-hundredth  of a
Preference  Share as to  which  the  Rights  are  exercised,  at or prior to the
earliest of (i) the close of  Business on August 2, 2009 (the "Final  Expiration
Date"), (ii) the time at which the Rights are redeemed as provided in Section 23
hereof  (the  "Redemption  Date"),  or (iii) the time at which  such  Rights are
exchanged as provided in Section 24 hereof.


                                      -10-

<PAGE>
                  (b)  The  Purchase  Price  for  each  one  one-hundredth  of a
Preference Share purchasable pursuant to the exercise of a Right shall initially
be $24.00,  and shall be subject to adjustment  from time to time as provided in
Section  11 or 13 hereof  and shall be  payable  in lawful  money of the  United
States of America in accordance with paragraph (c) below.

                  (c)  Upon   receipt  of  a  Right   Certificate   representing
exercisable  Rights,  with the  form of  election  to  purchase  duly  executed,
accompanied  by payment of the Purchase Price for the shares to be purchased and
an amount equal to any applicable transfer tax required to be paid by the holder
of such Right  Certificate  in  accordance  with  Section 9 hereof by  certified
check,  cashier's check or money order payable to the order of the Company,  the
Rights  Agent shall  thereupon  promptly (i) (A)  requisition  from any transfer
agent of the Preference Shares  certificates for the number of Preference Shares
to be purchased and the Company hereby irrevocably authorizes its transfer agent
to comply with all such requests,  or (B) requisition  from the depositary agent
depositary  receipts  representing  such  number  of  one  one-hundredths  of  a
Preference  Share as are to be  purchased  (in which case  certificates  for the
Preference  Shares  represented  by such  receipts  shall  be  deposited  by the
transfer  agent with the  depositary  agent) and the Company  hereby directs the
depositary agent to comply with such request, (ii) when appropriate, requisition
from the Company the amount of cash to be paid in lieu of issuance of fractional
shares in  accordance  with  Section  14  hereof,  (iii)  after  receipt of such
certificates or depositary  receipts,  cause the same to be delivered to or upon
the order of the registered holder of such Right Certificate, registered in such
name or names as may be  designated  by such  holder and (iv) when  appropriate,
after receipt,  deliver such cash to or upon the order of the registered  holder
of such Right Certificate.

                  (d) In case the  registered  holder of any  Right  Certificate
shall  exercise  less  than all of the  Rights  evidenced  thereby,  a new Right
Certificate  evidencing the Rights remaining  unexercised shall be issued by the
Rights Agent to the registered  holder of such Right  Certificate or to his duly
authorized assigns, subject to the provisions of Section 14 hereof.

                  Section 8. Cancellation and Destruction of Right Certificates.
All Right Certificates surrendered for the purpose of exercise,  transfer, split
up,  combination or exchange  shall,  if surrendered to the Company or to any of
its agents,  be delivered to the Rights  Agent for  cancellation  or in canceled
form, or, if  surrendered  to the Rights Agent,  shall be canceled by it, and no
Right Certificates shall be issued in lieu thereof except as expressly permitted
by any of the provisions of this Rights Agreement.  The Company shall deliver to
the Rights Agent for cancellation and retirement,  and the Rights Agent shall so
cancel and retire,  any other  Right  Certificate  purchased  or acquired by the
Company otherwise than upon the exercise thereof. The Rights Agent shall deliver
all canceled Right Certificates to the Company, or shall, at the written request
of the Company, destroy such canceled Right Certificates, and in such case shall
deliver a certificate of destruction thereof to the Company.

                  Section 9.  Availability  of  Preference  Shares.  The Company
covenants and agrees that it will cause to be reserved and kept available out of
its authorized and unissued  Preference  Shares or any Preference Shares held in
its treasury, the number of Preference Shares that will be

                                      -11-

<PAGE>
sufficient  to  permit  the  exercise  in  full  of all  outstanding  Rights  in
accordance  with Section 7. The Company  covenants  and agrees that it will take
all such  action  as may be  necessary  to  ensure  that all  Preference  Shares
delivered  upon  exercise  of  Rights  shall,  at the  time of  delivery  of the
certificates  for such  Preference  Shares  (subject to payment of the  Purchase
Price),  be  duly  and  validly   authorized  and  issued  and  fully  paid  and
nonassessable shares.

                  The Company further covenants and agrees that it will pay when
due and payable any and all federal and state  transfer  taxes and charges  that
may be payable in respect of the issuance or delivery of the Right  Certificates
or of any Preference Shares upon the exercise of Rights.  The Company shall not,
however,  be required (i) to pay any transfer  that may be payable in respect of
any transfer or delivery of Right  Certificates  to a person other than,  or the
issuance or delivery of certificates  or depositary  receipts for the Preference
Shares  in a name  other  than  that of,  the  registered  holder  of the  Right
Certificate  evidencing  Rights  surrendered for exercise or (ii) to issue or to
deliver any certificates or depositary  receipts for Preference  Shares upon the
exercise  of any  Rights  until any such tax shall  have been paid (any such tax
being payable by the holder of such Right  Certificate at the time of surrender)
or until it has been established to the Company's  reasonable  satisfaction that
no such tax is due.

                  The Company  covenants  and agrees that, so long as Preference
Shares issuable and deliverable upon the exercise of Rights may be listed on any
national  securities  exchange or automated  quotation  system, it shall use its
best  efforts  to  cause,  from  and  after  such  time  as  the  Rights  become
exercisable,  all securities reserved for issuance to be listed on such exchange
or  automated  quotation  system  upon  official  notice of  issuance  upon such
exercise.

                  The Company  shall (i)  prepare and file,  as soon as possible
following the Distribution  Date, a registration  statement under the Securities
Act of 1933, as amended (the "Act"), with respect to the securities  purchasable
upon exercise of the Rights on an appropriate form, (ii) cause such registration
statement to become  effective as soon as possible after such filing,  and (iii)
cause such registration  statement to remain effective (with a prospectus at all
times  meeting the  requirements  of the Act) until no longer  required to do so
under the Act with  respect  to  securities  purchasable  upon  exercise  of the
Rights.  The  Company  will also take all such  action as may be  required or is
appropriate  under the securities or blue sky laws of such  jurisdictions as may
be necessary or appropriate with respect to the securities  purchasable upon the
exercise of the Rights. The Company may temporarily  suspend for a period not to
exceed 90 days following the Distribution Date, the exercisability of the Rights
in order to prepare and file such registration statement and permit it to become
effective.  Upon any such suspension of  exercisability of Rights referred to in
this paragraph,  the Company shall issue a public announcement  stating that the
exercisability of the Rights has been temporarily suspended, as well as a public
announcement at such time as the suspension is no longer in effect.

                  Notwithstanding   any  provision  in  this  Agreement  to  the
contrary,  the Rights shall not be exercisable  by a holder in any  jurisdiction
where  the  requisite  qualification  to the  issuance  to such  holder,  or the
exercise by such holder of the Rights in such jurisdiction,  shall not have been
obtained

                                      -12-

<PAGE>
or be  obtainable,  or  the  exercise  thereof  shall  not  be  permitted  under
applicable  law  or a  registration  statement  shall  not  have  been  declared
effective.

                  Section 10.  Preference  Shares  Record  Date.  Each person in
whose name any certificate for Preference  Shares is issued upon the exercise of
Rights  shall for all  purposes be deemed to have become the holder of record of
the Preference  Shares  represented  thereby on, and such  certificate  shall be
dated, the date upon which the Right Certificate evidencing such Rights was duly
surrendered  and  payment of the  Purchase  Price (and any  applicable  transfer
taxes)  was made;  provided,  however,  that if the date of such  surrender  and
payment is a date upon which the Preference Shares transfer books of the Company
are closed, such person shall be deemed to have become the record holder of such
shares on, and such certificate shall be dated, the next succeeding Business Day
on which the Preference  Shares transfer books of the Company are open. Prior to
the exercise of the Rights evidenced thereby,  the holder of a Right Certificate
shall not be entitled to any rights of a holder of  Preference  Shares for which
the Rights shall be exercisable,  including,  without  limitation,  the right to
vote, to receive dividends or other  distributions or to exercise any preemptive
rights,  and shall not be entitled to receive any notice of any  proceedings  of
the Company, except as provided herein.

                  Section 11. Adjustment of Purchase Price,  Number of Shares or
Number of Rights. The Purchase Price, the number of Preference Shares covered by
each Right and the number of Rights  outstanding  are subject to adjustment from
time to time as provided in this Section 11.

                  (a) (i) In the event the  Company  shall at any time after the
date of this Agreement (A) declare a dividend on the  Preference  Shares payable
in Preference  Shares,  (B) subdivide the  outstanding  Preference  Shares,  (C)
combine the  outstanding  Preference  Shares into a smaller number of Preference
Shares or (D) issue any shares of its capital stock in a reclassification of the
Preference  Shares  (including any such  reclassification  in connection  with a
consolidation  or merger in which the  Company is the  continuing  or  surviving
corporation),  except as otherwise  provided in this Section 11(a), the Purchase
Price in  effect  at the time of the  record  date for such  dividend  or of the
effective date of such  subdivision,  combination or  reclassification,  and the
number  and kind of shares of capital  stock  issuable  on such  date,  shall be
proportionately  adjusted so that the holder of any Right  exercised  after such
time shall be  entitled to receive  the  aggregate  number and kind of shares of
capital stock which, if such Right had been exercised  immediately prior to such
date and at a time when the Preference Shares transfer books of the Company were
open,  he would have owned upon such  exercise  and been  entitled to receive by
virtue of such dividend, subdivision, combination or reclassification; provided,
however,  that in no event shall the  consideration to be paid upon the exercise
of one Right be less than the aggregate par value of the shares of capital stock
of the Company issuable upon exercise of one Right.

                  (ii)  Subject to Section  24 of this  Agreement,  in the event
that any Person  becomes  an  Acquiring  Person,  each  holder of a Right  shall
thereafter  have a right to receive,  upon exercise  thereof at a price equal to
the then current Purchase Price  multiplied by the number of one  one-hundredths
of a Preference Share for which a Right is then exercisable,  in accordance with
the terms

                                      -13-

<PAGE>
of this Agreement and in lieu of Preference Shares, such number of Common Shares
of the Company as shall equal the result  obtained by (x)  multiplying  the then
current Purchase Price by the number of one one-hundredths of a Preference Share
for which a Right is then  exercisable  and dividing  that product by (y) 50% of
the  then  current  per  share  market  price  of the  Company's  Common  Shares
(determined  pursuant to Section 11(d) hereof) on the date of the  occurrence of
such event.  In the event that any Person shall  become an Acquiring  Person and
the Rights shall then be outstanding, the Company shall not take any action that
would eliminate or diminish the benefits intended to be afforded by the Rights.

                  From and after the  occurrence of such event,  any Rights that
are or were  acquired  or  beneficially  owned by any  Acquiring  Person (or any
Associate or Affiliate of such Acquiring Person) shall be void and any holder of
such Rights  shall  thereafter  have no right to exercise  such Rights under any
provision of this Agreement.  No Right  Certificate  shall be issued pursuant to
Section 3 that represents Rights beneficially owned by an Acquiring Person whose
Rights  would be void  pursuant to the  preceding  sentence or any  Associate or
Affiliate  thereof;  no Right  Certificate  shall be issued at any time upon the
transfer  of any  Rights  to an  Acquiring  Person  whose  Rights  would be void
pursuant to the preceding  sentence or any Associate or Affiliate  thereof or to
any nominee of such  Acquiring  Person,  Associate or  Affiliate;  and any Right
Certificate  delivered to the Rights  Agent for transfer to an Acquiring  Person
whose Rights would be void pursuant to the preceding sentence shall be canceled.

                  (iii) In the event that there shall not be  sufficient  Common
Shares  issued but not  outstanding  or  authorized  but  unissued to permit the
exercise in full of the Rights in  accordance  with the  foregoing  subparagraph
(ii),  the Company  shall take all such action as may be  necessary to authorize
additional  Common Shares for issuance upon exercise of the Rights. In the event
the Company shall, after good faith effort, be unable to take all such action as
may be necessary to authorize such additional  Common Shares,  the Company shall
substitute, for each Common Share that would otherwise be issuable upon exercise
of a Right,  a number of  Preference  Shares or fraction  thereof  such that the
current per share market price of one Preference Share multiplied by such number
or fraction is equal to the current per share  market  price of one Common Share
as of the date of issuance of such Preference Shares or fraction thereof.

                  (b) In case  the  Company  shall  fix a  record  date  for the
issuance of rights,  options or warrants  to all  holders of  Preference  Shares
entitling them (for a period  expiring within 45 calendar days after such record
date) to subscribe for or purchase  Preference Shares (or shares having the same
rights,  privileges  and  preferences  as  the  Preference  Shares  ("equivalent
preference  shares"))  or  securities  convertible  into  Preference  Shares  or
equivalent  preference  shares at a price  per  Preference  Share or  equivalent
preference  share  (or  having a  conversion  price  per  share,  if a  security
convertible into Preference  Shares or equivalent  preference  shares) less than
the then current per share market price of the Preference  Shares (as defined in
Section  11(d)) on such record date,  the  Purchase  Price to be in effect after
such record date shall be determined by multiplying the Purchase Price in effect
immediately  prior to such  record date by a fraction,  the  numerator  of which
shall be the number of Preference  Shares  outstanding  on such record date plus
the number of Preference

                                      -14-

<PAGE>

Shares which the  aggregate  offering  price of the total  number of  Preference
Shares  and/or  equivalent  preference  shares  so to  be  offered  (and/or  the
aggregate  initial  conversion  price  of the  convertible  securities  so to be
offered)  would  purchase at such current  market price and the  denominator  of
which shall be the number of Preference  Shares  outstanding on such record date
plus the number of additional  Preference  Shares and/or  equivalent  preference
shares to be offered for subscription or purchase (or into which the convertible
securities so to be offered are initially convertible);  provided, however, that
in no event shall the consideration to be paid upon the exercise of one Right be
less than the  aggregate par value of the shares of capital stock of the Company
issuable upon exercise of one Right. In case such subscription price may be paid
in a consideration  part or all of which shall be in a form other than cash, the
value of such consideration shall be as determined in good faith by the Board of
Directors of the Company,  whose determination shall be described in a statement
filed with the Rights Agent.  Preference Shares owned by or held for the account
of the  Company  shall not be deemed  outstanding  for the  purpose  of any such
computation.  Such adjustment shall be made successively  whenever such a record
date is fixed; and in the event that such rights, options or warrants are not so
issued,  the  Purchase  Price shall be adjusted to be the  Purchase  Price which
would then be in effect if such record date had not been fixed.

                  (c) In case the Company shall fix a record date for the making
of a distribution  to all holders of the Preference  Shares  (including any such
distribution  made in  connection  with a  consolidation  or merger in which the
Company is the continuing or surviving corporation) of evidences of indebtedness
or assets (other than a regular quarterly cash dividend or a dividend payable in
Preference Shares) or subscription  rights or warrants (excluding those referred
to in Section  11(b)  hereof),  the  Purchase  Price to be in effect  after such
record date shall be  determined  by  multiplying  the Purchase  Price in effect
immediately  prior to such  record date by a fraction,  the  numerator  of which
shall be the per share  market  price of the  Preference  Shares on such  record
date,  less the fair market value (as  determined  in good faith by the Board of
Directors of the Company,  whose determination shall be described in a statement
filed  with the Rights  Agent) of the  portion  of the  assets or  evidences  of
indebtedness  so to be  distributed or of such  subscription  rights or warrants
applicable to one  Preference  Share and the  denominator of which shall be such
current per share market price of the Preference Shares; provided, however, that
in no event shall the consideration to be paid upon the exercise of one Right be
less than the  aggregate par value of the shares of capital stock of the Company
to be  issued  upon  exercise  of one  Right.  Such  adjustments  shall  be made
successively  whenever  such a record date is fixed;  and in the event that such
distribution  is not so made,  the Purchase  Price shall again be adjusted to be
the  Purchase  Price  which  would then be in effect if such record date had not
been fixed.

                  (d) (i) For the  purpose  of any  computation  hereunder,  the
"current per share market price" of any security (a  "Security"  for the purpose
of this  Section  11(d)(i)) on any date shall be deemed to be the average of the
daily closing prices per share of such Security for the 30  consecutive  Trading
Days (as such  term is  hereinafter  defined)  immediately  prior to such  date;
provided,  however, that in the event that the current per share market price of
the Security is determined  during a period  following the  announcement  by the
issuer of such  Security  of (A) a dividend  or  distribution  on such  Security
payable in shares of such Security or securities  convertible  into such shares,
or (B)

                                      -15-

<PAGE>
any subdivision,  combination or  reclassification of such Security and prior to
the expiration of 30 Trading Days after the  ex-dividend  date for such dividend
or  distribution,  or the  record  date for  such  subdivision,  combination  or
reclassification,  then,  and in each such case,  the current  per share  market
price shall be  appropriately  adjusted to reflect the current  market price per
share  equivalent of such Security.  The closing price for each day shall be the
last sale price,  regular way, or, in case no such sale takes place on such day,
the average of the closing bid and asked prices, regular way, in either case, as
reported in the principal consolidated transaction reporting system with respect
to securities listed on the principal national  securities exchange on which the
Security is listed or  admitted to trading or, if the  Security is not listed or
admitted to trading on any national securities  exchange,  the last quoted price
or, if not so quoted,  the  average of the high bid and low asked  prices in the
over-the-counter  market, as reported by the National  Association of Securities
Dealers,  Inc. Automated  Quotations System ("Nasdaq") or such other system then
in use,  or,  if on any  such  date  the  Security  is not  quoted  by any  such
organization,  the average of the closing bid and asked prices as furnished by a
professional  market maker making a market in the Security selected by the Board
of Directors of the Company.  The term  "Trading  Day" shall mean a day on which
the principal  national  securities  exchange or automated  quotation  system on
which the Security is listed or admitted to trading is open for the  transaction
of  business  or, if the  Security  is not listed or  admitted to trading on any
national securities exchange or automated quotation system, a Business Day.

                  (ii)  For  the  purpose  of  any  computation  hereunder,  the
"current per share market price" of the Preference Shares shall be determined in
accordance  with the  method set forth in Section  11(d)(i).  If the  Preference
Shares are not publicly  traded,  the  "current  per share market  price" of the
Preference  Shares  shall be  conclusively  deemed to be the  current  per share
market price of the Common  Shares as  determined  pursuant to Section  11(d)(i)
(appropriately  adjusted to reflect any stock split,  stock  dividend or similar
transaction  occurring  after the date hereof),  multiplied  by one hundred.  If
neither the Common  Shares nor the  Preference  Shares are  publicly  held or so
listed or traded, "current per share market price" shall mean the fair value per
share as  determined  in good faith by the Board of  Directors  of the  Company,
whose  determination  shall be  described  in a statement  filed with the Rights
Agent.

                  (e) No  adjustment  in the  Purchase  Price  shall be required
unless such  adjustment  would require an increase or decrease of at least 1% in
the Purchase Price;  provided,  however, that any adjustments which by reason of
this  Section  11(e) are not  required  to be made shall be carried  forward and
taken into account in any subsequent  adjustment.  All  calculations  under this
Section 11 shall be made to the nearest cent or to the nearest one one-millionth
of a Preference  Share or one  ten-thousandth  of any other share or security as
the case may be.  Notwithstanding  the first sentence of this Section 11(e), any
adjustment  required by this  Section 11 shall be made no later than the earlier
of (i)  three  years  from  the  date  of the  transaction  that  requires  such
adjustment  or (ii) the date of the  expiration  of the  right to  exercise  any
Rights.

                  (f) If as a result of an  adjustment  made pursuant to Section
11(a) hereof, the holder of any Right thereafter exercised shall become entitled
to receive  any shares of capital  stock of the  Company  other than  Preference
Shares, thereafter the number of such other shares so receivable

                                      -16-

<PAGE>
upon exercise of any Right shall be subject to adjustment from time to time in a
manner and on terms as nearly  equivalent as practicable to the provisions  with
respect to the  Preference  Shares  contained  in  Section  11(a)  through  (c),
inclusive,  and the  provisions  of Sections 7, 9, 10 and 13 with respect to the
Preference Shares shall apply on like terms to any such other shares.

                  (g) All Rights originally issued by the Company  subsequent to
any adjustment  made to the Purchase Price hereunder shall evidence the right to
purchase,  at the adjusted Purchase Price, the number of one one-hundredths of a
Preference  Share  purchasable  from time to time hereunder upon exercise of the
Rights, all subject to further adjustment as provided herein.

                  (h) Unless the Company  shall have made the election  provided
below in Section 11(i),  upon each  adjustment of the Purchase Price as a result
of the  calculations  made in  Sections  11(b) and (c),  each Right  outstanding
immediately prior to the making of such adjustment shall thereafter evidence the
right  to  purchase,  at  the  adjusted  Purchase  Price,  that  number  of  one
one-hundredths   of  a  Preference   Share   (calculated   to  the  nearest  one
one-millionth of a Preference  Share) obtained by (i) multiplying (x) the number
of one  one-hundredths  of a share covered by a Right  immediately prior to this
adjustment  by (y) the  Purchase  Price  in  effect  immediately  prior  to such
adjustment  of the Purchase  Price and (ii)  dividing the product so obtained by
the Purchase Price in effect  immediately  after such adjustment of the Purchase
Price.

                  (i)  The  Company  may  elect  on or  after  the  date  of any
adjustment of the Purchase Price to adjust the number of Rights, in substitution
for any  adjustment in the number of one  one-hundredths  of a Preference  Share
purchasable upon the exercise of a Right.  Each of the Rights  outstanding after
such  adjustment of the number of Rights shall be exercisable  for the number of
one  one-hundredths  of a  Preference  Share for  which a Right was  exercisable
immediately  prior to such  adjustment.  Each Right held of record prior to such
adjustment  of  the  number  of  Rights  shall  become  that  number  of  Rights
(calculated to the nearest one ten-thousandth) obtained by dividing the Purchase
Price in effect  immediately  prior to adjustment  of the Purchase  Price by the
Purchase Price in effect immediately after adjustment of the Purchase Price. The
Company shall make a public announcement of its election to adjust the number of
Rights,  indicating  the record  date for the  adjustment,  and, if known at the
time, the amount of the adjustment to be made.  This record date may be the date
on which the Purchase Price is adjusted or any day thereafter, but, if the Right
Certificates have been issued,  shall be at least 10 days later than the date of
the public  announcement.  If Right  Certificates  have been  issued,  upon each
adjustment of the number of Rights  pursuant to this Section 11(i),  the Company
shall, as promptly as practicable,  cause to be distributed to holders of record
of Right Certificates on such record date Right Certificates evidencing, subject
to Section 14  hereof,  the  additional  Rights to which such  holders  shall be
entitled as a result of such adjustment, or, at the option of the Company, shall
cause  to  be  distributed  to  such  holders  of  record  in  substitution  and
replacement for the Right Certificates held by such holders prior to the date of
adjustment,  and upon surrender thereof,  if required by the Company,  new Right
Certificates  evidencing  all of the  Rights  to  which  such  holders  shall be
entitled after such adjustment. Right Certificates so to be distributed shall be
issued, executed and countersigned in the manner

                                      -17-

<PAGE>

provided  for  herein  and shall be  registered  in the names of the  holders of
record  of  Right  Certificates  on the  record  date  specified  in the  public
announcement.

                  (j)  Irrespective  of any adjustment or change in the Purchase
Price or the number of one  one-hundredths  of a Preference  Share issuable upon
the exercise of the Rights,  the Right  Certificates  theretofore and thereafter
issued  may  continue  to  express  the  Purchase  Price  and the  number of one
one-hundredths  of a Preference  Share that were  expressed in the initial Right
Certificates issued hereunder.

                  (k) Before  taking any action that would  cause an  adjustment
reducing the Purchase Price below one  one-hundredth  of the then par value,  if
any, of the Preference Shares issuable upon exercise of the Rights,  the Company
shall take any  corporate  action that may, in the  opinion of its  counsel,  be
necessary in order that the Company may validly and legally issue fully paid and
nonassessable Preference Shares at such adjusted Purchase Price.

                  (l) In any case in which this Section 11 shall require that an
adjustment  in the  Purchase  Price be made  effective as of a record date for a
specified  event,  the Company may elect to defer until the  occurrence  of such
event the issuance to the holder of any Right  exercised  after such record date
of the  Preference  Shares and other capital stock or securities of the Company,
if any,  issuable upon such exercise  over and above the  Preference  Shares and
other capital stock or  securities  of the Company,  if any,  issuable upon such
exercise on the basis of the Purchase Price in effect prior to such  adjustment;
provided,  however,  that the Company shall deliver to such holder a due bill or
other  appropriate  instrument  evidencing  such holder's  right to receive such
additional shares upon the occurrence of the event requiring such adjustment.

                  (m)   Anything   in   this   Section   11  to   the   contrary
notwithstanding,  the Company  shall be entitled to make such  reductions in the
Purchase  Price,  in addition to those  adjustments  expressly  required by this
Section 11, as and to the extent that it in its sole discretion  shall determine
to be advisable in order that any consolidation or subdivision of the Preference
Shares,  issuance  wholly  for cash of any  Preference  Shares  at less than the
current  market  price,  issuance  wholly  for  cash  of  Preference  Shares  or
securities  that  by  their  terms  are  convertible  into or  exchangeable  for
Preference  Shares,  dividends on Preference Shares payable in Preference Shares
or issuance of rights,  options or warrants  referred to  hereinabove in Section
11(b),  hereafter made by the Company to holders of its Preference  Shares shall
not be taxable to such stockholders.

                  (n) In the  event  that at any  time  after  the  date of this
Agreement and prior to the  Distribution  Date, the Company shall (i) declare or
pay any dividend on the Common Shares  payable in Common Shares or (ii) effect a
subdivision,   combination   or   consolidation   of  the   Common   Shares  (by
reclassification  or otherwise  than by payment of  dividends in Common  Shares)
into a greater or lesser number of Common Shares,  then in any such case (A) the
number of one  one-hundredths of a Preference Share purchasable after such event
upon proper exercise of each Right shall be determined by multiplying the number
of one one-hundredths of a Preference Share so purchasable  immediately prior to
such event by a fraction, the numerator of which is the number of Common

                                      -18-

<PAGE>
Shares outstanding immediately before such event and the denominator of which is
the number of Common Shares  outstanding  immediately  after such event, and (B)
each Common  Share  outstanding  immediately  after such event shall have issued
with  respect to it that  number of Rights that each  Common  Share  outstanding
immediately  prior to such event had issued with respect to it. The  adjustments
provided for in this Section  11(n) shall be made  successively  whenever such a
dividend is declared or paid or such a subdivision, combination or consolidation
is effected.

                  Section 12.  Certificate of Adjusted  Purchase Price or Number
of  Shares.  Whenever  an  adjustment  is made as  provided  in Section 11 or 13
hereof, the Company shall promptly (a) prepare a certificate  setting forth such
adjustment,  and a brief statement of the facts  accounting for such adjustment,
(b) file  with the  Rights  Agent and with each  transfer  agent for the  Common
Shares or the Preference  Shares a copy of such certificate and (c) mail a brief
summary thereof to each holder of a Right Certificate in accordance with Section
25 hereof.

                  Section  13.  Consolidation,  Merger  or Sale or  Transfer  of
Assets or Earning Power. In the event that, directly or indirectly,  at any time
after a Person has become an Acquiring Person, (a) the Company shall consolidate
with, or merge with and into, any other Person, (b) any Person shall consolidate
with the  Company,  or merge with and into the Company and the Company  shall be
the continuing or surviving  corporation of such merger and, in connection  with
such merger, all or part of the Common Shares shall be changed into or exchanged
for stock or other  securities  of any other  Person (or the Company) or cash or
any other property,  or (c) the Company shall sell or otherwise transfer (or one
or more of its Subsidiaries  shall sell or otherwise  transfer),  in one or more
transactions,  assets or earning power  aggregating 50% or more of the assets or
earning  power of the  Company  and its  Subsidiaries  (taken as a whole) to any
other  Person  other  than  the  Company  or one  or  more  of its  wholly-owned
Subsidiaries,  then, and in each such case,  proper  provision  shall be made so
that (i) each holder of a Right  (except as  otherwise  provided  herein)  shall
thereafter have the right to receive, upon the exercise thereof at a price equal
to  the  then  current   Purchase   Price   multiplied  by  the  number  of  one
one-hundredths of a Preference Share for which a Right is then  exercisable,  in
accordance  with the terms of this  Agreement and in lieu of Preference  Shares,
such  number of Common  Shares of such other  Person  (including  the Company as
successor  thereto or as the  surviving  corporation)  as shall equal the result
obtained by (A) multiplying the then current Purchase Price by the number of one
one-hundredths  of a Preference  Share for which a Right is then exercisable and
dividing  that  product by (B) 50% of the then current per share market price of
the Common  Shares of such other Person  (determined  pursuant to Section  11(d)
hereof)  on the date of  consummation  of such  consolidation,  merger,  sale or
transfer;  (ii) the issuer of such Common Shares shall thereafter be liable for,
and shall assume, by virtue of such consolidation, merger, sale or transfer, all
the obligations and duties of the Company pursuant to this Agreement;  (iii) the
term "Company" shall thereafter be deemed to refer to such issuer; and (iv) such
issuer shall take such steps (including,  but not limited to, the reservation of
a sufficient number of its Common Shares in accordance with Section 9 hereof) in
connection  with  such  consummation  as may be  necessary  to  assure  that the
provisions  hereof shall  thereafter be applicable,  as nearly as reasonably may
be, in relation to the Common Shares thereafter deliverable upon the exercise of
the Rights.  The Company shall not  consummate any such  consolidation,  merger,
sale or transfer unless prior thereto the

                                      -19-

<PAGE>

Company and such issuer shall have  executed and delivered to the Rights Agent a
supplemental  agreement  so  providing.  The  Company  shall not enter  into any
transaction  of the kind  referred to in this  Section 13 if at the time of such
transaction   there  are  any  rights,   warrants,   instruments  or  securities
outstanding  or  any  agreements  or  arrangements  which,  as a  result  of the
consummation of such transaction,  would eliminate or substantially diminish the
benefits  intended to be afforded by the Rights.  The provisions of this Section
13 shall similarly  apply to successive  mergers or  consolidations  or sales or
other transfers.

                  Notwithstanding  anything in this  Agreement to the  contrary,
Section 13 shall not be applicable to a transaction  described in Section 13 if:
(i) such transaction is consummated with a Person or Persons who acquired Common
Shares  pursuant to a Qualifying  Offer or a Permitted  Offer (or a wholly owned
Subsidiary  of any such  Person or  Persons);  (ii) the price per  Common  Share
offered in such  transaction is not less than the price per Common Share paid to
all  holders of Common  Shares  whose  shares  were  purchased  pursuant to such
Qualifying Offer or Permitted Offer; and (iii) the form of consideration offered
in such  transaction is the same as the form of  consideration  paid pursuant to
such  Qualifying  Offer  or  Permitted  Offer.  Upon  consummation  of any  such
transaction  contemplated  by this Section 13, all Rights provided for hereunder
shall expire.

                  Section 14. Fractional Rights and Fractional  Shares.  (a) The
Company  shall not be required  to issue  fractions  of Rights or to  distribute
Right  Certificates that evidence  fractional Rights. In lieu of such fractional
Rights,  there shall be paid to the registered holders of the Right Certificates
with regard to which such  fractional  Rights would  otherwise  be issuable,  an
amount in cash equal to the same fraction of the current market value of a whole
Right.  For the purposes of this Section  14(a),  the current  market value of a
whole  Right  shall be the  closing  price of the  Rights  for the  Trading  Day
immediately  prior to the date on which such  fractional  Rights would have been
otherwise issuable.  The closing price for any day shall be the last sale price,
regular  way,  or, in case no such sale takes place on such day,  the average of
the closing bid and asked prices, regular way, in either case as reported in the
principal  consolidated  transaction reporting system with respect to securities
listed on the  principal  national  securities  exchange on which the Rights are
listed or  admitted  to trading  or, if the Rights are not listed or admitted to
trading on any national securities exchange, the last quoted price or, if not so
quoted, the average of the high bid and low asked prices in the over-the-counter
market,  as  reported  by Nasdaq or such other  system then in use or, if on any
such date the Rights are not quoted by any such organization, the average of the
closing bid and asked prices as furnished by a professional  market maker making
a market in the Rights selected by the Board of Directors of the Company.  If on
any such date no such market  maker is making a market in the  Rights,  the fair
value of the  Rights on such date as  determined  in good  faith by the Board of
Directors of the Company shall be used.

                  (b) The Company  shall not be required to issue  fractions  of
Preference  Shares  (other than  fractions  that are  integral  multiples of one
one-hundredth  of a  Preference  Share)  upon  exercise  of  the  Rights  or  to
distribute  certificates that evidence fractional  Preference Shares (other than
fractions  that are  integral  multiples  of one  one-hundredth  of a Preference
Share).   Fractions  of   Preference   Shares  in  integral   multiples  of  one
one-hundredth of a Preference Share may, at the

                                      -20-

<PAGE>
election of the Company,  be evidenced by  depositary  receipts,  pursuant to an
appropriate  agreement  between  the Company  and a  depositary  selected by it;
provided,  that such agreement shall provide that the holders of such depositary
receipts shall have all the rights, privileges and preferences to which they are
entitled as  beneficial  owners of the  Preference  Shares  represented  by such
depositary  receipts.  In lieu of  fractional  Preference  Shares  that  are not
integral multiples of one one-hundredth of a Preference Share, the Company shall
pay to the registered  holders of Right Certificates at the time such Rights are
exercised as herein provided an amount in cash equal to the same fraction of the
current market value of one Preference  Share.  For the purposes of this Section
14(b), the current market value of a Preference Share shall be the closing price
of a Preference Share (as determined  pursuant to the second sentence of Section
11(d)(i)  hereof)  for the  Trading  Day  immediately  prior to the date of such
exercise,  however, that if the closing price of the Preference Shares cannot be
so determined,  the closing price of the Preference  Shares for such Trading Day
shall be  conclusively  deemed to be an amount equal to the closing price of the
Common Shares  (determined  pursuant to the second sentence of Section  11(d)(i)
hereof)  for  such  Trading  Day  multiplied  by  100  (as  such  number  may be
appropriately  adjusted to reflect events such as stock splits, stock dividends,
recapitalizations  or  similar  transactions   relating  to  the  Common  Shares
occurring after the date of this Agreement.

                  (c) The  holder  of a Right  by the  acceptance  of the  Right
expressly  waives his right to receive any  fractional  Rights or any fractional
shares upon exercise of a Right (except as provided above).

                  Section 15. Rights of Action.  All rights of action in respect
of this  Agreement,  excepting  the rights of action  given to the Rights  Agent
under Section 18 hereof, are vested in the respective  registered holders of the
Right  Certificates (and, prior to the Distribution Date, the registered holders
of the Common Shares);  and any registered  holder of any Right Certificate (or,
prior to the  Distribution  Date, of the Common Shares),  without the consent of
the Rights Agent or of the holder of any other Right  Certificate  (or, prior to
the Distribution Date, of the Common Shares), may, in his own behalf and for his
own  benefit,  enforce,  and may  institute  and  maintain  any suit,  action or
proceeding  against the Company to enforce,  or otherwise act in respect of, his
right to exercise the Rights  evidenced by such Right  Certificate in the manner
provided in such Right  Certificate and in this Agreement.  Without limiting the
foregoing or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and will be entitled to specific performance of
the  obligations  under,  and  injunctive  relief  against  actual or threatened
violations of the obligations of any Person subject to, this Agreement.

                  Section 16.  Agreement  of Right  Holders.  Every  holder of a
Right,  by  accepting  the same,  consents  and agrees  with the Company and the
Rights Agent and with every other holder of a Right that:

                  (a)  prior  to the  Distribution  Date,  the  Rights  will  be
transferable only in connection with the transfer of the Common Shares;

                                      -21-

<PAGE>
                  (b) after the  Distribution  Date, the Right  Certificates are
transferable  only on the registry  books of the Rights Agent if  surrendered at
the principal  office of the Rights Agent,  duly  endorsed or  accompanied  by a
proper instrument of transfer;

                  (c) the  Company  and the Rights  Agent may deem and treat the
person in whose name the Right Certificate (or, prior to the Distribution  Date,
the associated  Common Shares  certificate)  is registered as the absolute owner
thereof and of the Rights evidenced  thereby  (notwithstanding  any notations of
ownership or writing on the Right  Certificates or the associated  Common Shares
certificate  made by anyone other than the Company or the Rights  Agent) for all
purposes  whatsoever,  and neither  the  Company  nor the Rights  Agent shall be
affected by any notice to the contrary; and

                  (d)   notwithstanding   anything  in  this  Agreement  to  the
contrary,  neither the Company nor the Rights Agent shall have any  liability to
any holder of a Right or other  Person as a result of its  inability  to perform
any of its  obligations  under this  Agreement by reason of any  preliminary  or
permanent  injunction  or other  order,  decree or  ruling  issued by a court of
competent jurisdiction or by a governmental, regulatory or administrative agency
or commission,  or any statute,  rule, regulation or executive order promulgated
or enacted by any governmental  authority,  prohibiting or otherwise restraining
performance of such obligation;  provided,  however,  that the Company shall use
its best  efforts to have any such order,  decree or ruling  lifted or otherwise
overturned as soon as possible.

                  Section 17. Right Certificate Holder Not Deemed a Stockholder.
No holder, as such, of any Right Certificate shall be entitled to vote,  receive
dividends  or be deemed for any purpose the holder of the  Preference  Shares or
any other  securities  of the  Company  that may at any time be  issuable on the
exercise of the Rights represented  thereby, nor shall anything contained herein
or in any Right  Certificate be construed to confer upon the holder of any Right
Certificate,  as such,  any of the rights of a stockholder of the Company or any
right to vote for the  election of  directors  or upon any matter  submitted  to
stockholders  at any  meeting  thereof,  or to give or  withhold  consent to any
corporate  action,  or to receive notice of meetings or other actions  affecting
stockholders  (except as provided in Section 25 hereof), or to receive dividends
or subscription  rights,  or otherwise,  until the Right or Rights  evidenced by
such  Right  Certificate  shall  have  been  exercised  in  accordance  with the
provisions hereof.

                  Section 18. Concerning the Rights Agent. The Company agrees to
pay to the Rights Agent reasonable  compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent,  its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this  Agreement and the exercise and  performance of its duties
hereunder.  The Company  also agrees to  indemnify  the Rights Agent for, and to
hold it harmless  against,  any loss,  liability,  or expense,  incurred without
negligence, bad faith or willful misconduct on the part of the Rights Agent, for
anything done or omitted by the Rights Agent in connection  with the  acceptance
and  administration  of this  Agreement,  including  the costs and  expenses  of
defending against any claim of liability in the premises.

                                      -22-

<PAGE>
                  The  Rights  Agent  shall  be  protected  and  shall  incur no
liability  for, or in respect of any action taken,  suffered or omitted by it in
connection with, its administration of this Agreement in reliance upon any Right
Certificate  or certificate  for the  Preference  Shares or Common Shares or for
other securities of the Company,  instrument of assignment or transfer, power of
attorney,   endorsement,   affidavit,   letter,  notice,   direction,   consent,
certificate,  statement, or other paper or document believed by it to be genuine
and to be signed,  executed and, where necessary,  verified or acknowledged,  by
the proper  person or persons,  or  otherwise  upon the advice of counsel as set
forth in Section 20 hereof.

                  Section  19.  Merger  or  Consolidation  or  Change of Name of
Rights  Agent.  Any  corporation  into which the Rights  Agent or any  successor
Rights  Agent  may be  merged  or  with  which  it may be  consolidated,  or any
corporation resulting from any merger or consolidation to which the Rights Agent
or any successor Rights Agent shall be a party, or any corporation succeeding to
the  stock  transfer  or  corporate  trust  powers  of the  Rights  Agent or any
successor  Rights  Agent,  shall be the successor to the Rights Agent under this
Agreement without the execution or filing of any paper or any further act on the
part of any of the parties  hereto;  provided,  that such  corporation  would be
eligible for  appointment  as a successor  Rights Agent under the  provisions of
Section 21 hereof. In case at the time such successor Rights Agent shall succeed
to the agency created by this  Agreement,  any of the Right  Certificates  shall
have been  countersigned but not delivered,  any such successor Rights Agent may
adopt the  countersignature  of the  predecessor  Rights  Agent and deliver such
Right  Certificates so countersigned;  and in case at that time any of the Right
Certificates shall not have been  countersigned,  any successor Rights Agent may
countersign such Right Certificates either in the name of the predecessor Rights
Agent or in the name of the successor  Rights Agent;  and in all such cases such
Right  Certificates shall have the full force provided in the Right Certificates
and in this Agreement.

                  In case at any  time  the name of the  Rights  Agent  shall be
changed  and at  such  time  any of  the  Right  Certificates  shall  have  been
countersigned but not delivered, the Rights Agent may adopt the countersignature
under its prior name and deliver Right  Certificates  so  countersigned;  and in
case  at  that  time  any  of  the  Right   Certificates  shall  not  have  been
countersigned,  the Rights Agent may countersign such Right Certificates  either
in its prior  name or in its  changed  name;  and in all such  cases  such Right
Certificates shall have the full force provided in the Right Certificates and in
this Agreement.

                  Section  20.  Duties  of  Rights   Agent.   The  Rights  Agent
undertakes  the  duties  and  obligations  imposed  by this  Agreement  upon the
following terms and  conditions,  by all of which the Company and the holders of
Right Certificates, by their acceptance thereof, shall be bound:

                  (a) The Rights Agent may consult  with legal  counsel (who may
be legal counsel for the Company), and the opinion of such counsel shall be full
and complete  authorization  and protection to the Rights Agent as to any action
taken or omitted by it in good faith and in accordance with such opinion.


                                      -23-

<PAGE>
                  (b)  Whenever  in the  performance  of its  duties  under this
Agreement the Rights Agent shall deem it necessary or desirable that any fact or
matter be proved or  established by the Company prior to taking or suffering any
action hereunder,  such fact or matter (unless other evidence in respect thereof
be herein  specifically  prescribed) may be deemed to be conclusively proved and
established by a certificate signed by any one of the Chairman of the Board, the
Chief Executive Officer, the President, any Vice President, the Treasurer or the
Secretary of the Company and delivered to the Rights Agent; and such certificate
shall be full authorization to the Rights Agent for any action taken or suffered
in good faith by it under the provisions of this Agreement in reliance upon such
certificate.

                  (c) The Rights Agent shall be liable  hereunder to the Company
and any  other  Person  only  for its  own  negligence,  bad  faith  or  willful
misconduct.

                  (d) The Rights  Agent  shall not be liable for or by reason of
any of the statements of fact or recitals  contained in this Agreement or in the
Right  Certificates  (except  its  countersignature  thereof)  or be required to
verify the same, but all such statements and recitals are and shall be deemed to
have been made by the Company only.

                  (e) The Rights Agent shall not be under any  responsibility in
respect of the validity of this  Agreement or the execution and delivery  hereof
(except  the due  execution  hereof by the  Rights  Agent) or in  respect of the
validity or  execution  of any Right  Certificate  (except its  countersignature
thereof);  nor shall it be  responsible  for any  breach by the  Company  of any
covenant or condition  contained in this Agreement or in any Right  Certificate;
nor shall it be responsible for any change in the  exercisability  of the Rights
(including the Rights becoming void pursuant to Section 11(a)(ii) hereof) or any
adjustment in the terms of the Rights  (including  the manner,  method or amount
thereof) provided for in Section 3, 11, 13, 23 or 24, or the ascertaining of the
existence of facts that would require any such change or adjustment (except with
respect to the exercise of Rights evidenced by Right  Certificates  after actual
notice  that such change or  adjustment  is  required);  nor shall it by any act
hereunder  be  deemed  to  make  any   representation  or  warranty  as  to  the
authorization  or reservation of any Preference  Shares to be issued pursuant to
this Agreement or any Right  Certificate or as to whether any Preference  Shares
will,  when  issued,   be  validly   authorized  and  issued,   fully  paid  and
nonassessable.

                  (f)  The  Company  agrees  that  it  will  perform,   execute,
acknowledge  and deliver or cause to be performed,  executed,  acknowledged  and
delivered  all such further and other acts,  instruments  and  assurances as may
reasonably be required by the Rights Agent for the carrying out or performing by
the Rights Agent of the provisions of this Agreement.

                  (g) The Rights  Agent is hereby  authorized  and  directed  to
accept instructions with respect to the performance of its duties hereunder from
any  one  of the  Chairman  of the  Board,  the  Chief  Executive  Officer,  the
President,  any Vice  President,  the Secretary or the Treasurer of the Company,
and to apply to such officers for advice or  instructions in connection with its
duties, and

                                      -24-

<PAGE>
it shall not be liable for any action  taken or  suffered by it in good faith in
accordance  with  instructions  of any such  officer  or for any delay in acting
while waiting for those instructions.

                  (h) The Rights Agent and any stockholder, director, officer or
employee of the Rights Agent may buy, sell or deal in any of the Rights or other
securities of the Company or become pecuniarily interested in any transaction in
which the  Company  may be  interested,  or  contract  with or lend money to the
Company or otherwise  act as fully and freely as though it were not Rights Agent
under this Agreement. Nothing herein shall preclude the Rights Agent from acting
in any other capacity for the Company or for any other legal entity.

                  (i) The  Rights  Agent may  execute  and  exercise  any of the
rights or powers hereby vested in it or perform any duty hereunder either itself
or by or through  its  attorneys  or agents,  and the Rights  Agent shall not be
answerable or  accountable  for any act,  default,  neglect or misconduct of any
such attorneys or agents or for any loss to the Company  resulting from any such
act, default,  neglect or misconduct,  provided reasonable care was exercised in
the selection and continued employment thereof.

                  Section 21.  Change of Rights  Agent.  The Rights Agent or any
successor  Rights Agent may resign and be discharged  from its duties under this
Agreement  upon 30 days'  notice in writing  mailed to the  Company  and to each
transfer  agent of the  Common  Shares or  Preference  Shares by  registered  or
certified  mail,  and to the holders of the Right  Certificates  by  first-class
mail. The Company may remove the Rights Agent or any successor  Rights Agent for
any  reason  upon 30 days'  notice in  writing,  mailed to the  Rights  Agent or
successor  Rights Agent,  as the case may be, and to each transfer  agent of the
Common Shares or Preference  Shares by registered or certified  mail, and to the
holders of the Right Certificates by first-class mail. If the Rights Agent shall
resign or be removed or shall otherwise become incapable of acting,  the Company
shall appoint a successor to the Rights Agent. If the Company shall fail to make
such appointment  within a period of 30 days after giving notice of such removal
or after it has been  notified in writing of such  resignation  or incapacity by
the  resigning  or  incapacitated  Rights  Agent  or by the  holder  of a  Right
Certificate  (who shall,  with such  notice,  submit his Right  Certificate  for
inspection by the Company),  then the registered holder of any Right Certificate
may apply to any court of competent  jurisdiction  for the  appointment of a new
Rights Agent. Any successor Rights Agent, whether appointed by the Company or by
such a court,  shall be a legal  business  entity  organized and doing  business
under the laws of the United States or of the State of New York (or of any other
state of the United  States so long as such entity is  authorized to do business
in the State of New York and is in good standing,  has an office in the State of
New York, is  authorized  under such laws to exercise  corporate  trust or stock
transfer powers and is subject to supervision or examination by federal or state
authority)  and  that  has at the  time of its  appointment  as  Rights  Agent a
combined  capital  and surplus of at least $5 million.  After  appointment,  the
successor Rights Agent shall be vested with the same powers,  rights, duties and
responsibilities  as if it had been  originally  named as Rights  Agent  without
further act or deed; but the predecessor Rights Agent shall deliver and transfer
to the successor Rights Agent any property at the time held by it hereunder, and
execute and deliver any further assurance, conveyance, act or deed necessary for
the purpose. Not later than the effective date of any such appointment, the


                                      -25-

<PAGE>
Company shall file notice thereof in writing with the  predecessor  Rights Agent
and each transfer agent of the Common Shares or Preference  Shares,  and mail by
first-class  mail  notice  thereof in writing to the  registered  holders of the
Right Certificates.  Failure to give any notice provided for in this Section 21,
however, or any defect therein, shall not affect the legality or validity of the
resignation  or removal of the Rights Agent or the  appointment of the successor
Rights Agent, as the case may be.

                  Section   22.    Issuance    of   New   Right    Certificates.
Notwithstanding  any of the provisions of this Agreement or of the Rights to the
contrary,  the  Company  may,  at  its  option,  issue  new  Right  Certificates
evidencing  Rights in such form as may be approved by its Board of  Directors to
reflect any adjustment or change in the Purchase Price and the number or kind or
class of shares or other  securities  or  property  purchasable  under the Right
Certificates  made in  accordance  with the  provisions  of this  Agreement.  In
addition,  in  connection  with the  issuance  and sale by the Company of Common
Shares following the Distribution  Date, the Company (a) shall,  with respect to
Common  Shares so issued or sold  pursuant  to the  exercise  or  conversion  of
securities  issued prior to the  Distribution  Date that are exercisable for, or
convertible  into  Common  Shares,  and (b) may,  in any other  case,  if deemed
necessary,  appropriate  or  desirable by the Board of Directors of the Company,
issue Right  Certificates  representing an equivalent  number of Rights as would
have been  issued in respect of such  Common  Shares if they had been  issued or
sold prior to the Distribution Date appropriately adjusted as provided herein as
if they had been so issued or sold;  provided,  however,  that (i) no such Right
Certificate  shall be issued  if,  and to the  extent  that,  in its good  faith
judgment the Board of Directors of the Company  shall have  determined  that the
issuance of such Right Certificate could have a material adverse tax consequence
to the  Company  or to the  Person  to  whom or  which  such  Right  Certificate
otherwise would be issued,  and (ii) no such Right  Certificate  shall be issued
if, and to the extent that,  appropriate  adjustment  otherwise  shall have been
made in lieu of the issuance thereof.

                  Section  23.  Redemption.  (a) The Board of  Directors  of the
Company may, at its option,  at any time prior to 5:00 p.m, Eastern time, on the
earlier of (i) the tenth  Business Day  following the Shares  Acquisition  Date,
subject to extension  by the Board of Directors  for a period of time up to, but
not exceeding,  ten additional days, or (ii) the Final  Expiration Date,  redeem
all but not less than all of the then  outstanding  Rights at a redemption price
of $.001 per Right,  appropriately  adjusted to reflect any stock  split,  stock
dividend or similar transaction occurring after the date hereof (such redemption
price being hereinafter  referred to as the "Redemption  Price"). The redemption
of the Rights by the Board of Directors  may be made  effective at such time, on
such  basis  and with such  conditions  as the  Board of  Directors  in its sole
discretion  may  establish.  Notwithstanding  anything in this  Agreement to the
contrary,  no Rights may be exercised at any time that the Rights are subject to
redemption in accordance with the terms of this Agreement.

                  (b)  Immediately  upon the action of the Board of Directors of
the Company  ordering the redemption of the Rights  pursuant to paragraph (a) of
this  Section 23, and without  any  further  action and without any notice,  the
right to exercise the Rights will terminate and the only right thereafter of the
holders of Rights shall be to receive the Redemption Price. The Company shall

                                      -26-

<PAGE>
promptly give public notice of any such redemption;  provided, however, that the
failure to give, or any defect in, any such notice shall not affect the validity
of such  redemption.  Within 10 days after such action of the Board of Directors
ordering  the  redemption  of the  Rights,  the  Company  shall mail a notice of
redemption  to all of the holders of the then  outstanding  Rights at their last
addresses as they appear upon the  registry  books of the Rights Agent or, prior
to the  Distribution  Date, on the registry  books of the transfer agent for the
Common Shares.  Any notice that is mailed in the manner herein provided shall be
deemed given, whether or not the holder receives the notice. Each such notice of
redemption  shall state the method by which the payment of the Redemption  Price
will be made. The Company may, at its option,  pay the Redemption Price in cash,
Common  Shares  (based  upon the current  per share  market  price of the Common
Shares (determined  pursuant to Section 11(d) hereof) at the time of redemption)
or any other form of consideration  deemed appropriate by the Board of Directors
of the Company  (based upon the fair market  value of such other  consideration,
determined  by the  Board of  Directors  of the  Company  in good  faith) or any
combination thereof.

                  At any time following the Shares  Acquisition  Date, the Board
of Directors of the Company may  relinquish the right to redeem the Rights under
this Section 23 by duly adopting a resolution to that effect.  Immediately  upon
adoption of such resolution, the rights of the Board of Directors of the Company
to redeem the Rights  shall  terminate  without  further  action and without any
notice. Promptly after adoption of such a resolution, the Company shall publicly
announce such action; provided, however, that the failure to give, or any defect
in, any such notice  shall not affect the validity of the action of the Board of
Directors  of the  Company.  Neither the Company  nor any of its  Affiliates  or
Associates  may redeem,  acquire or purchase for value any Rights at any time in
any  manner  other  than that  specifically  set forth in this  Section 23 or in
Section 24 hereof,  and other than in  connection  with the  purchase  of Common
Shares prior to the Distribution Date.

                  Section  24.  Exchange.  (a) The  Board  of  Directors  of the
Company  may, at its option,  at any time after any Person  becomes an Acquiring
Person,  exchange all or part of the then  outstanding  and  exercisable  Rights
(which shall not include Rights that have become void pursuant to the provisions
of Section  11(a)(ii)  hereof)  for Common  Shares at an  exchange  ratio of one
Common Share per Right, appropriately adjusted to reflect any stock split, stock
dividend or similar  transaction  occurring after the date hereof (such exchange
ratio being hereinafter  referred to as the "Exchange  Ratio").  Notwithstanding
the  foregoing,  the Board of  Directors  shall not be  empowered to effect such
exchange at any time after any Person (other than the Company, any Subsidiary of
the Company, any employee benefit plan of the Company or any such Subsidiary, or
any entity holding Common Shares for or pursuant to the terms of any such plan),
together  with  all  Affiliates  and  Associates  of such  Person,  becomes  the
Beneficial Owner of 50% or more of the Common Shares then outstanding.

                  (b)  Immediately  upon the action of the Board of Directors of
the Company  ordering  the exchange of any Rights  pursuant to paragraph  (a) of
this Section 24 and without any further action and without any notice, the right
to exercise  such Rights  shall  terminate  and the only right  thereafter  of a
holder of such Rights shall be to receive that number of Common  Shares equal to
the


                                      -27-

<PAGE>
number of such Rights held by such holder  multiplied by the Exchange Ratio. The
Company  shall  promptly  give  public  notice of any such  exchange;  provided,
however,  that the  failure to give,  or any defect in,  such  notice  shall not
affect the validity of such exchange.  The Company  promptly shall mail a notice
of any  such  exchange  to all of the  holders  of such  Rights  at  their  last
addresses as they appear upon the registry books of the Rights Agent. Any notice
that is mailed in the manner herein  provided shall be deemed given,  whether or
not the holder receives the notice. Each such notice of exchange shall state the
method by which the  exchange  of the Common  Shares for Rights will be effected
and,  in the event of any  partial  exchange,  the number of Rights that will be
exchanged.  Any partial  exchange shall be effected pro rata based on the number
of Rights (other than Rights that have become void pursuant to the provisions of
Section 11(a)(ii) hereof) held by each holder of Rights.

                  (c) In the event that  there  shall not be  sufficient  Common
Shares  issued but not  outstanding  or  authorized  but  unissued to permit any
exchange  of Rights as  contemplated  in  accordance  with this  Section 24, the
Company  shall take all such action as may be necessary to authorize  additional
Common Shares for issuance upon exchange of the Rights. In the event the Company
shall,  after good  faith  effort,  be unable to take all such  action as may be
necessary  to  authorize  such  additional  Common  Shares,  the  Company  shall
substitute, for each Common Share that would otherwise be issuable upon exchange
of a Right,  a number of  Preference  Shares or fraction  thereof  such that the
current per share market price of one Preference Share multiplied by such number
or fraction is equal to the current per share  market  price of one Common Share
as of the date of issuance of such Preference Shares or fraction thereof.

                  (d) The Company  shall not be required to issue  fractions  of
Common Shares or to distribute  certificates  that  evidence  fractional  Common
Shares. In lieu of such fractional  Common Shares,  the Company shall pay to the
registered  holders  of  the  Right  Certificates  with  regard  to  which  such
fractional  Common Shares would otherwise be issuable an amount in cash equal to
the same fraction of the current  market value of a whole Common Share.  For the
purposes of this paragraph (d), the current market value of a whole Common Share
shall be the  closing  price of a Common  Share (as  determined  pursuant to the
second  sentence of Section  11(d)(i)  hereof)  for the Trading Day  immediately
prior to the date of exchange pursuant to this Section 24.

                  Section 25. Notice of Certain Events.  (a) In case the Company
shall  propose  (i) to pay any  dividend  payable  in stock of any  class to the
holders  of its  Preference  Shares  or to make any  other  distribution  to the
holders of its Preference Shares (other than a regular quarterly cash dividend),
(ii) to offer to the  holders of its  Preference  Shares  rights or  warrants to
subscribe for or to purchase any additional Preference Shares or shares of stock
of any class or any other  securities,  rights or  options,  (iii) to effect any
reclassification  of  its  Preference  Shares  (other  than  a  reclassification
involving only the subdivision of outstanding Preference Shares), (iv) to effect
any  consolidation  or  merger  into or  with,  or to  effect  any sale or other
transfer  (or to permit  one or more of its  Subsidiaries  to effect any sale or
other transfer),  in one or more  transactions,  of 50% or more of the assets or
earning  power of the  Company and its  Subsidiaries  (taken as a whole) to, any
other Person,  (v) to effect the  liquidation,  dissolution or winding up of the
Company,  or (vi) to declare or pay any dividend on the Common Shares payable in
Common Shares or to effect a subdivision,


                                      -28-

<PAGE>
combination  or  consolidation  of the  Common  Shares (by  reclassification  or
otherwise  than by payment of dividends in Common  Shares),  then,  in each such
case,  the  Company  shall  give  to each  holder  of a  Right  Certificate,  in
accordance with Section 26 hereof, a notice of such proposed action, which shall
specify the record date for the purposes of such stock dividend, or distribution
of  rights  or   warrants,   or  the  date  on  which   such   reclassification,
consolidation,  merger, sale, transfer, liquidation,  dissolution, or winding up
is to take place and the date of  participation  therein  by the  holders of the
Common Shares and/or  Preference  Shares,  if any such date is to be fixed,  and
such notice shall be so given in the case of any action covered by clause (i) or
(ii) above at least 10 days prior to the record date for determining  holders of
the Preference  Shares for purposes of such action,  and in the case of any such
other action,  at least 10 days prior to the date of the taking of such proposed
action or the date of participation  therein by the holders of the Common Shares
and/or Preference Shares, whichever shall be the earlier.

                  (b) In case the event set forth in  Section  11(a)(ii)  hereof
shall occur,  then the Company shall as soon as practicable  thereafter  give to
each holder of a Right  Certificate,  in  accordance  with Section 26 hereof,  a
notice of the  occurrence of such event,  which notice shall describe such event
and the consequences of such event to holders of Rights under Section  11(a)(ii)
hereof.

                  Section 26.  Notices.  Notices or demands  authorized  by this
Agreement  to be given or made by the Rights Agent or by the holder of any Right
Certificate to or on the Company shall be sufficiently  given or made if sent by
first-class mail, postage prepaid,  addressed (until another address is filed in
writing with the Rights Agent) as follows:

                  American Pacific Corporation
                  3770 Howard Hughes Parkway, Suite 300
                  Las Vegas, Nevada 89109
                  Attn: Chief Executive Officer

                  Subject to the provisions of Section 21 hereof,  any notice or
demand authorized by this Agreement to be given or made by the Company or by the
holder of any Right  Certificate to or on the Rights Agent shall be sufficiently
given or made if sent by first-class  mail,  postage  prepaid,  addressed (until
another address is filed in writing with the Company) as follows:

                  American Stock Transfer & Trust Company
                  40 Wall Street, 46th Floor
                  New York, New York 10005
                  Attention: Corporate Trust Department

                  Notices or demands authorized by this Agreement to be given or
made by the Company or the Rights  Agent to the holder of any Right  Certificate
shall  be  sufficiently  given  or made if sent  by  first-class  mail,  postage
prepaid,  addressed to such holder at the address of such holder as shown on the
registry books of the Company.


                                      -29-

<PAGE>
                  All  notices or  demands  which are  required  or may be given
under  this  Agreement  shall be deemed to have been duly  given five days after
being sent by first class mail, postage prepaid.

                  Section 27.  Supplements and Amendments.  The Company may from
time to time  supplement  or amend this  Agreement  without the  approval of any
holders  of Right  Certificates  in order to cure any  ambiguity,  to correct or
supplement any provision  contained herein that may be defective or inconsistent
with any other provisions  herein,  or to make any other provisions with respect
to the  Rights  that the  Company  may deem  necessary  or  desirable,  any such
supplement  or amendment to be evidenced by a writing  signed by the Company and
the Rights Agent; provided, however, that from and after such time as any Person
becomes an Acquiring  Person,  this Agreement shall not be amended in any manner
that would  adversely  affect the interests of the holders of Rights (other than
an Acquiring Person or an Affiliate or Associate of an Acquiring  Person).  Upon
delivery of a certificate from an appropriate officer of the Company that states
that the proposed  supplement  or amendment is in  compliance  with the terms of
this Section 27, the Rights Agent shall  execute such  supplement  or amendment;
provided,  however,  that the failure or refusal of the Rights  Agent to execute
such  supplement or amendment shall not affect the validity of any supplement or
amendment adopted by the Company,  any of which shall be effective in accordance
with the  terms  thereof.  Notwithstanding  anything  in this  Agreement  to the
contrary,  no  supplement or amendment  shall be made that  decreases the stated
Redemption Price or the period of time remaining until the Final Expiration Date
or that  modifies a time  period  relating to when the Rights may be redeemed at
such time as the Rights are not then redeemable. Prior to the Distribution Date,
the  interests  of the  holders of Rights  shall be deemed  coincident  with the
interest of the holders of the Company's Common Stock.

                  Section 28.  Successors.  All the covenants and  provisions of
this  Agreement  by or for the benefit of the Company or the Rights  Agent shall
bind and  inure  to the  benefit  of their  respective  successors  and  assigns
hereunder.

                  Section  29.  Benefits  of  this  Agreement.  Nothing  in this
Agreement shall be construed to give to any person or corporation other than the
Company,  the Rights Agent and the registered  holders of the Right Certificates
(and, prior to the Distribution  Date, the Common Shares) any legal or equitable
right, remedy or claim under this Agreement; but this Agreement shall be for the
sole and exclusive  benefit of the Company,  the Rights Agent and the registered
holders of the Right  Certificates  (and,  prior to the  Distribution  Date, the
Common Shares).

                  Section 30. Severability.  If any term, provision, covenant or
restriction  of this Agreement is held by a court of competent  jurisdiction  or
other  authority  to be invalid,  void or  unenforceable,  the  remainder of the
terms, provisions,  covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated.

                  Section  31.  Governing  Law.  This  Agreement  and each Right
Certificate  issued  hereunder  shall be deemed to be a contract  made under the
laws of the State of New York and for


                                      -30-

<PAGE>

all purposes  shall be governed by and construed in accordance  with the laws of
such State without reference to the choice of law provisions thereof.

                  Section 32.  Counterparts.  This  Agreement may be executed in
any number of counterparts and each of such counterparts  shall for all purposes
be deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.

                  Section 33. Descriptive Headings.  Descriptive headings of the
several  Sections of this Agreement are inserted for convenience  only and shall
not  control or affect  the  meaning or  construction  of any of the  provisions
hereof.

                  Section 34. Administration.  (a) The Board of Directors of the
Company shall have the exclusive power and authority to administer and interpret
the  provisions  of  this  Agreement  and to  exercise  all  rights  and  powers
specifically  granted to the Board of Directors of the Company or to the Company
or as may be necessary or advisable in the administration of this Agreement. All
such actions, calculations,  determinations and interpretations that are done or
made by the Board of  Directors  of the  Company in good  faith  shall be final,
conclusive  and binding on the  Company,  the Rights  Agent,  the holders of the
Rights and all other parties and shall not subject the Board of Directors of the
Company to any liability to the holders of the Rights.

         (b) It is understood  that the TIDE  Committee (as described  below) of
the Board of  Directors  shall review and  evaluate  this  Agreement in order to
consider  whether  the  maintenance  of this  Agreement  continues  to be in the
interests of the Company, its stockholders and any other relevant constituencies
of the Company every three years. Following each such review, the TIDE Committee
will  communicate its conclusions to the full Board of Directors,  including any
recommendations in light thereof as to whether this Agreement should be modified
or the Rights should be redeemed.  The TIDE Committee  shall be appointed by the
Board of  Directors of the Company and shall  comprise  Directors of the Company
who are not officers, employees or Affiliates of the Company, provided, however,
that for the  purposes of this  Section  34(b),  no Director  shall be deemed an
Affiliate of the Company solely due to his status as a Director of the Company.


                                      -31-

<PAGE>

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement  to be duly  executed and  attested,  all as of the day and year first
above written.

                                            AMERICAN PACIFIC CORPORATION


                                            By   /s/ David N. Keys
                                                 -------------------------------
                                               Name:    David N. Keys
                                               Title:   Executive Vice President


                                            AMERICAN STOCK TRANSFER & TRUST
                                            COMPANY


                                            By /s/ Herbert J. Lemmer
                                               ---------------------------------
                                                   Name:    Herbert J. Lemmer
                                                   Title:   Vice President


                                      -32-

<PAGE>
                                                                       Exhibit A

                          CERTIFICATE OF DESIGNATION OF
                   SERIES D PARTICIPATING PREFERENCE STOCK OF
                          AMERICAN PACIFIC CORPORATION

                         (Pursuant to Section 151 of the
                General Corporation Law of the State of Delaware)


         American  Pacific  Corporation,  a  corporation  organized and existing
under the General  Corporation Law of the State of Delaware  (hereinafter called
the "Corporation"),  hereby certifies that the following  resolution was adopted
by the Board of Directors of the  Corporation  as required by Section 151 of the
General Corporation Law at a meeting duly called and held on August 3, 1999:

         WHEREAS,  the Board of  Directors  of the  Corporation  (the  "Board of
Directors"  or the  "Board") is  authorized  to provide for the  issuance of the
shares of preferred stock in series, and by filing a certificate pursuant to the
applicable  law of the State of  Delaware,  to  establish  from time to time the
number  of  shares  to  be  included  in  each  such  series,  and  to  fix  the
designations,  powers,  preferences and rights of the shares of each such series
and the qualifications, limitations or restrictions thereof;

         WHEREAS,  the Board of Directors desires,  pursuant to its authority as
aforesaid,  to designate a new series of preferred  stock,  to set the number of
shares constituting such series and to fix the rights,  preferences,  privileges
and restrictions of such series.

         NOW,  THEREFORE,  BE IT RESOLVED,  that the Board of  Directors  hereby
creates a series of preferred  stock, par value $1.00 per share (the "Preference
Stock"),  of the  Corporation  and hereby states the  designation  and number of
shares, and fixes the relative rights, preferences,  and limitations thereof, in
addition to the provisions set forth in the Certificate of  Incorporation of the
Corporation that are applicable to Preference Stock of all series, as follows:

                  Series D Participating Preference Stock:

                  Section 1.  Designation,  Amount and Par Value.  The series of
Preference  Stock  shall be  designated  as "Series D  Participating  Preference
Stock" (the "Series D Preference Stock"), and the number of shares so designated
shall be 350,000. The par value of each share of Preferred Stock shall be $1.00.
Such number of shares may be increased or decreased by  resolution  of the Board
of Directors;  provided,  that no decrease  shall reduce the number of shares of
Series D  Preference  Stock to a number  less than the  number  of  shares  then
outstanding plus the number of shares reserved for issuance upon the exercise of
outstanding  options,   rights  or  warrants  or  upon  the  conversion  of  any
outstanding  securities  issued by the  Corporation  convertible  into  Series D
Preference Stock.


                                       A-1

<PAGE>
                  Section 2.  Dividends and Distributions.

                  (A)  Subject to the rights of the holders of any shares of any
         series of  Preference  Stock (or any similar  stock)  ranking prior and
         superior to the Series D Preference  Stock with  respect to  dividends,
         the holders of shares of Series D Preference  Stock,  in  preference to
         the  holders of Common  Stock,  par value  $.10 per share (the  "Common
         Stock"),  of the Corporation,  and of any other junior stock,  shall be
         entitled to receive, when, as and if declared by the Board of Directors
         out of funds legally  available for that purpose,  quarterly  dividends
         payable in cash on the first day of August, November,  February and May
         in each year (each such date being  referred to herein as a  "Quarterly
         Dividend  Payment Date"),  commencing on the first  Quarterly  Dividend
         Payment Date after the first issuance of a share or fraction of a share
         of Series D Preference  Stock,  in an amount per share  (rounded to the
         nearest  cent)  equal to the greater of (a) $1.00 or (b) subject to the
         provision for adjustment hereinafter set forth, 100 times the aggregate
         per share amount of all cash dividends, and 100 times the aggregate per
         share  amount  (payable  in kind) of all  non-cash  dividends  or other
         distributions,  other than a dividend payable in shares of Common Stock
         or a  subdivision  of  the  outstanding  shares  of  Common  Stock  (by
         reclassification or otherwise),  declared on the Common Stock since the
         immediately  preceding Quarterly Dividend Payment Date or, with respect
         to the first Quarterly  Dividend Payment Date, since the first issuance
         of any share or fraction of a share of Series D  Preference  Stock.  In
         the event the Corporation shall at any time declare or pay any dividend
         on the  Common  Stock  payable in shares of Common  Stock,  or effect a
         subdivision or combination or consolidation  of the outstanding  shares
         of Common Stock (by  reclassification or otherwise than by payment of a
         dividend in shares of Common  Stock) into a greater or lesser number of
         shares of  Common  Stock,  then in each  such case the  amount to which
         holders  of  shares  of  Series  D  Preference   Stock  were   entitled
         immediately  prior to such  event  under  clause  (b) of the  preceding
         sentence  shall be adjusted by  multiplying  such amount by a fraction,
         the  numerator  of  which is the  number  of  shares  of  Common  Stock
         outstanding  immediately  after such event and the denominator of which
         is  the  number  of  shares  of  Common  Stock  that  were  outstanding
         immediately prior to such event.

                  (B) The  Corporation  shall declare a dividend or distribution
         on the Series D Preference  Stock as provided in paragraph  (A) of this
         Section immediately after it declares a dividend or distribution on the
         Common Stock (other than a dividend payable in shares of Common Stock);
         provided that, in the event that no dividend or distribution shall have
         been declared or made on the Common Stock during the period between any
         Quarterly  Dividend  Payment  Date  and the next  subsequent  Quarterly
         Dividend  Payment  Date,  a dividend of $1.00 per share on the Series D
         Preference  Stock  shall  nevertheless  be payable  on such  subsequent
         Quarterly Dividend Payment Date.

                  (C)  Dividends  shall  begin to accrue  and be  cumulative  on
         outstanding  shares of Series D  Preference  Stock  from the  Quarterly
         Dividend  Payment Date next preceding the date of issue of such shares,
         unless the date of issue of such shares is prior to the record date


                                       A-2

<PAGE>
         for the first Quarterly  Dividend Payment Date, in which case dividends
         on such  shares  shall  begin to accrue  from the date of issue of such
         shares,  or unless the date of issue is a  Quarterly  Dividend  Payment
         Date or is a date  after  the  record  date  for the  determination  of
         holders of shares of Series D  Preference  Stock  entitled to receive a
         quarterly  dividend and before such Quarterly Dividend Payment Date, in
         either of which  events  such  dividends  shall  begin to accrue and be
         cumulative  from such  Quarterly  Dividend  Payment  Date.  Accrued but
         unpaid dividends shall not bear interest.  Dividends paid on the shares
         of Series D Preference Stock in an amount less than the total amount of
         such  dividends at the time accrued and payable on such shares shall be
         allocated pro rata on a  share-by-share  basis among all such shares at
         the time outstanding.  The Board of Directors may fix a record date for
         the  determination  of holders of shares of Series D  Preference  Stock
         entitled  to receive  payment of a dividend  or  distribution  declared
         thereon,  which record date shall be not less than 10 days and not more
         than 60 days prior to the date fixed for the payment thereof.

                  Section 3.  Voting  Rights.  The holders of shares of Series D
Preference Stock shall have the following voting rights:

                  (A) Subject to the provision for  adjustment  hereinafter  set
         forth, each share of Series D Preference Stock shall entitle the holder
         thereof  to  100  votes  on all  matters  submitted  to a  vote  of the
         stockholders of the Corporation.  In the event the Corporation shall at
         any time  declare or pay any  dividend on the Common  Stock  payable in
         shares of Common  Stock,  or effect a  subdivision  or  combination  or
         consolidation   of  the   outstanding   shares  of  Common   Stock  (by
         reclassification  or otherwise  than by payment of a dividend in shares
         of Common  Stock)  into a greater or lesser  number of shares of Common
         Stock,  then in each such  case the  number of votes per share to which
         holders  of  shares  of  Series  D  Preference   Stock  were   entitled
         immediately  prior to such event shall be adjusted by multiplying  such
         number by a fraction, the numerator of which is the number of shares of
         Common  Stock   outstanding   immediately  after  such  event  and  the
         denominator  of which is the number of shares of Common Stock that were
         outstanding immediately prior to such event.

                  (B)  Except  as  otherwise   provided  herein,  in  any  other
         Certificate of  Designations  creating a series of Preference  Stock or
         any  similar  stock,  or by law,  the  holders  of  shares  of Series D
         Preference  Stock and the  holders  of  shares of Common  Stock and any
         other capital stock of the  Corporation  having  general  voting rights
         shall vote together as one class on all matters  submitted to a vote of
         stockholders of the Corporation.

                  (C) Except as set forth in the Certificate of Incorporation or
         herein, or as otherwise provided by law, holders of Series D Preference
         Stock shall have no special  voting  rights and their consent shall not
         be  required  (except  to the  extent  they are  entitled  to vote with
         holders of Common Stock as set forth  herein) for taking any  corporate
         action.

                  Section  4.  Reacquired   Shares.   Any  shares  of  Series  D
Preference  Stock  purchased or  otherwise  acquired by the  Corporation  in any
manner whatsoever shall be retired and canceled


                                       A-3

<PAGE>
promptly  after the  acquisition  thereof.  All such  shares  shall  upon  their
cancellation  become  authorized but unissued shares of Preference Stock and may
be  reissued  as  part  of a new  series  of  Preference  Stock  subject  to the
conditions and restrictions on issuance set forth herein,  in the Certificate of
Incorporation,  or in any other Certificate of Designations creating a series of
Preference Stock or any similar stock or as otherwise required by law.

                  Section 5.  Liquidation,  Dissolution  or Winding Up. Upon any
liquidation, dissolution or winding up of the Corporation, no distribution shall
be made (1) to the  holders  of shares of stock  ranking  junior  (either  as to
dividends  or upon  liquidation,  dissolution  or  winding  up) to the  Series D
Preference  Stock  unless,  prior  thereto,  the  holders  of shares of Series D
Preference  Stock shall have  received  $100 per share,  plus an amount equal to
accrued and unpaid dividends and distributions thereon, whether or not declared,
to the date of such  payment,  provided  that the  holders of shares of Series D
Preference  Stock shall be entitled  to receive an  aggregate  amount per share,
subject to the  provision for  adjustment  hereinafter  set forth,  equal to 100
times the aggregate  amount to be distributed  per share to holders of shares of
Common  Stock,  or (2) to the  holders  of shares of stock  ranking  on a parity
(either as to dividends or upon liquidation, dissolution or winding up) with the
Series D Preference  Stock,  except  distributions  made ratably on the Series D
Preference Stock and all such parity stock in proportion to the total amounts to
which the  holders  of all such  shares  are  entitled  upon  such  liquidation,
dissolution  or  winding  up.  In the event  the  Corporation  shall at any time
declare  or pay any  dividend  on the Common  Stock  payable in shares of Common
Stock,  or  effect  a  subdivision  or  combination  or   consolidation  of  the
outstanding  shares of Common Stock (by  reclassification  or otherwise  than by
payment of a dividend in shares of Common Stock) into a greater or lesser number
of shares of Common Stock,  then in each such case the aggregate amount to which
holders of shares of Series D Preference Stock were entitled  immediately  prior
to such event under the proviso in clause (1) of the preceding sentence shall be
adjusted by multiplying  such amount by a fraction the numerator of which is the
number of shares of Common Stock  outstanding  immediately  after such event and
the  denominator  of which is the  number of shares  of Common  Stock  that were
outstanding immediately prior to such event.

                  Section 6. Consolidation, Merger, etc. In case the Corporation
shall enter into any consolidation,  merger, combination or other transaction in
which the shares of Common Stock are  exchanged  for or changed into other stock
or securities,  cash and/or any other property, then in any such case each share
of Series D Preference  Stock shall at the same time be  similarly  exchanged or
changed  into an amount  per  share,  subject to the  provision  for  adjustment
hereinafter  set  forth,  equal to 100  times  the  aggregate  amount  of stock,
securities,  cash and/or any other property  (payable in kind),  as the case may
be, into which or for which each share of Common Stock is changed or  exchanged.
In the event the  Corporation  shall at any time  declare or pay any dividend on
the Common Stock payable in shares of Common Stock,  or effect a subdivision  or
combination  or  consolidation  of the  outstanding  shares of Common  Stock (by
reclassification  or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common  Stock,  then in each
such case the amount set forth in the  preceding  sentence  with  respect to the
exchange or change of shares of Series D  Preference  Stock shall be adjusted by
multiplying  such amount by a fraction,  the numerator of which is the number of
shares of Common Stock


                                       A-4

<PAGE>
outstanding  immediately  after such event and the  denominator  of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

                  Section 7. No  Redemption.  The shares of Series D  Preference
Stock shall not be redeemable.

                  Section 8. Rank.  The Series D  Preference  Stock  shall be of
equal rank in respect of the preference as to dividends and to payments upon the
liquidation, dissolution or winding up, whether voluntary or involuntary, of the
Corporation, with all shares of Preference Stock of all series.

                  Section 9. Amendment.  The Certificate of Incorporation of the
Corporation  shall not be amended in any manner that would  materially  alter or
change the  powers,  preferences  or special  rights of the Series D  Preference
Stock so as to affect them adversely without the affirmative vote of the holders
of at least two-thirds of the outstanding  shares of Series D Preference  Stock,
voting together as a single class.

                   [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK
                             SIGNATURE PAGE FOLLOWS]


                                       A-5

<PAGE>
                  IN  WITNESS  WHEREOF,  this  Certificate  of  Designations  is
executed  under  penalty  of perjury  on behalf of the  Corporation  this day of
August, 1999.

                                            AMERICAN PACIFIC CORPORATION


                                            By:  ___________________________
                                                 David N. Keys
                                                 Executive Vice President






                                       A-6

<PAGE>
                                                                       Exhibit B

                            Form of Right Certificate

Certificate No. R-

                  RIGHTS NOT EXERCISABLE AFTER AUGUST 2, 2009 OR EARLIER IF
                  REDEMPTION OR EXCHANGE OCCURS.  THE RIGHTS ARE SUBJECT TO
                  REDEMPTION AT $.001 PER RIGHT AND TO EXCHANGE ON THE TERMS
                  SET FORTH IN THE RIGHTS AGREEMENT.

                                Right Certificate

                          AMERICAN PACIFIC CORPORATION

                  This certifies that , or registered assigns, is the registered
owner of the number of Rights set forth above,  each of which entitles the owner
thereof,  subject  to  the  terms,  provisions  and  conditions  of  the  Rights
Agreement, dated as of August 3, 1999 (the "Rights Agreement"), between American
Pacific Corporation,  a Delaware corporation (the "Company"), and American Stock
Transfer & Trust Company (the "Rights  Agent"),  to purchase from the Company at
any time  after the  Distribution  Date (as such term is  defined  in the Rights
Agreement)  and  prior to 5:00  P.M.,  Eastern  time,  on  August 2, 2009 at the
principal  office of the  Rights  Agent,  or at the office of its  successor  as
Rights Agent, one one-hundredth of a fully paid non-assessable share of Series D
Participating  Preference Stock, without par value (the "Preference Shares"), of
the Company, at a purchase price of $24.00 per one one-hundredth of a Preference
Share (the  "Purchase  Price"),  upon  presentation  and surrender of this Right
Certificate  with the Form of Election to Purchase duly executed.  The number of
Rights evidenced by this Right Certificate (and the number of one one-hundredths
of a Preference  Share that may be  purchased  upon  exercise  hereof) set forth
above, and the Purchase Price set forth above, are the number and Purchase Price
as of August 3, 1999,  based on the  Preference  Shares as  constituted  at such
date. As provided in the Rights Agreement,  the Purchase Price and the number of
one one-hundredths of a Preference Share that may be purchased upon the exercise
of the Rights  evidenced by this Right  Certificate  are subject to modification
and adjustment upon the happening of certain events.

                  This  Right  Certificate  is  subject  to all  of  the  terms,
provisions and conditions of the Rights Agreement,  which terms,  provisions and
conditions  are hereby  incorporated  herein by reference and made a part hereof
and to which Rights Agreement reference is hereby made for a full description of
the rights, limitations of rights, obligations,  duties and immunities hereunder
of the Rights  Agent,  the Company  and the  holders of the Right  Certificates.
Copies of the Rights Agreement are on file at the principal executive offices of
the Company and at the offices of the Rights Agent.



                                       B-1

<PAGE>
                  This  Right   Certificate,   with  or  without   other   Right
Certificates, upon surrender at the principal office of the Rights Agent, may be
exchanged for another Right Certificate or Right  Certificates of like tenor and
date evidencing  Rights entitling the holder to purchase a like aggregate number
of Preference  Shares as the Rights evidenced by the Right  Certificate or Right
Certificates  surrendered  shall have entitled such holder to purchase.  If this
Right  Certificate  shall be exercised in part,  the holder shall be entitled to
receive upon surrender  hereof another Right  Certificate or Right  Certificates
for the number of whole Rights not exercised.

                  Subject to the provisions of the Rights Agreement,  the Rights
evidenced by this Certificate (i) may be redeemed by the Company at a redemption
price  of $.001  per  Right  or (ii)  may be  exchanged  in whole or in part for
Preference  Shares or shares of the Company's  Common Stock,  par value $.10 per
share.

                  No  fractional  Preference  Shares  shall be  issued  upon the
exercise of any Right or Rights  evidenced hereby (other than fractions that are
integral multiples of one one-hundredth of a Preference Share, which may, at the
election of the  Company,  be  evidenced by  depositary  receipts),  but in lieu
thereof a cash payment  will be made,  as provided in the Rights  Agreement.  No
holder of this Right  Certificate shall be entitled to vote or receive dividends
or be deemed for any purpose the holder of the Preference Shares or of any other
securities  of the  Company  that may at any time be  issuable  on the  exercise
hereof,  nor shall  anything  contained  in the  Rights  Agreement  or herein be
construed  to confer  upon the holder  hereof,  as such,  any of the rights of a
stockholder of the Company or any right to vote for the election of directors or
upon any matter  submitted to stockholders at a meeting  thereof,  or to give or
withhold  consent to any corporate  action,  or to receive notice of meetings or
other  actions  affecting   stockholders  (except  as  provided  in  the  Rights
Agreement), or to receive dividends or subscription rights, or otherwise,  until
the  Right or  Rights  evidenced  by this  Right  Certificate  shall  have  been
exercised as provided in the Rights Agreement.

                  This Right  Certificate  shall not be valid or obligatory  for
any purpose until it shall have been countersigned by the Rights Agent.




                                       B-2

<PAGE>
                  WITNESS the facsimile  signature of the proper officers of the
Company and its corporate seal.

Dated:              ,     .


ATTEST:                                          AMERICAN PACIFIC CORPORATION


                                                 By ____________________________

Countersigned:

AMERICAN STOCK TRANSFER & TRUST COMPANY


By _____________________________
Authorized Officer




                                       B-3

<PAGE>
                    Form of Reverse Side of Right Certificate

                               FORM OF ASSIGNMENT

             (To be executed by the registered holder if such holder
                   desires to transfer the Right Certificate)

                  FOR VALUE RECEIVED _________________ hereby sells, assigns and
transfers unto _________________________________________________________________
                  (Please print name and address of transferee)
this Right Certificate, together with all right, title and interest therein, and
does hereby irrevocably  constitute and appoint            Attorney, to transfer
the within Right Certificate on the books of the within-named Company, with full
power of substitution.

Dated:_____________________


                                             ___________________________________
                                             Signature

Signature Guaranteed:




                  The undersigned  hereby  certifies by checking the appropriate
boxes that:

                  (1) the Rights evidenced by this Right Certificate [ ] are [ ]
are not being sold, assigned, transferred, split up, combined or exchanged by or
on behalf of a Person  who is or was an  Acquiring  Person  or an  Affiliate  or
Associate  of any  such  Person  (as  such  terms  are  defined  in  the  Rights
Agreement);

                  (2)  after  due  inquiry  and to  the  best  knowledge  of the
undersigned,  it [ ] did [ ] did not acquire the Rights  evidenced by this Right
Certificate  from any  Person who is,  was or became an  Acquiring  Person or an
Affiliate or Associate of an Acquiring Person.

Dated:  _________________




                                             ___________________________________
                                             Signature



                                       B-4

<PAGE>
             Form of Reverse Side of Right Certificate -- continued


                          FORM OF ELECTION TO PURCHASE

                  (To be executed if holder desires to exercise
                  Rights represented by the Right Certificate.)

To: AMERICAN PACIFIC CORPORATION

                  The undersigned  hereby  irrevocably elects to exercise Rights
represented by this Right Certificate to purchase the Preference Shares issuable
upon the  exercise  of such  Rights  and  requests  that  certificates  for such
Preference Shares be issued in the name of:

(Please insert social security
or other identifying number)

                         (Please print name and address)

If such  number of Rights  shall not be all the Rights  evidenced  by this Right
Certificate,  a new Right  Certificate for the balance  remaining of such Rights
shall be registered in the name of and delivered to:

(Please insert social security
or other identifying number)

                         (Please print name and address)

Dated:



                  Signature



                                       B-5

<PAGE>

    Form of Reverse Side of Right Certificate -- continued

Signature Guaranteed:





                  The undersigned  hereby  certifies by checking the appropriate
boxes that:

                  (1) the Rights evidenced by this Right Certificate [ ] are [ ]
are not being sold, assigned, transferred, split up, combined or exchanged by or
on behalf of a Person  who is or was an  Acquiring  Person  or an  Affiliate  or
Associate  of any  such  Person  (as  such  terms  are  defined  in  the  Rights
Agreement);

                  (2)  after  due  inquiry  and to  the  best  knowledge  of the
undersigned,  it [ ] did [ ] did not acquire the rights  evidenced by this Right
Certificate  from any  Person who is,  was or became an  Acquiring  Person or an
Affiliate or Associate of an Acquiring Person.

Dated:  _________________



                                             ___________________________________
                                                           Signature


- --------------------------------------------------------------------------------

                                     NOTICE

                  The signature in the Form of Assignment or Form of Election to
Purchase,  as the case may be, must conform to the name as written upon the face
of this Right Certificate in every particular, without alteration or enlargement
or any change whatsoever.

                  In the event the  certification set forth above in the Form of
Assignment  or the Form of  Election  to  Purchase,  as the case may be,  is not
completed,  the Company and the Rights Agent will deem the  beneficial  owner of
the Rights  evidenced by this Right  Certificate to be an Acquiring Person or an
Affiliate or  Associate  thereof (as defined in the Rights  Agreement)  and such
Assignment or Election to Purchase will not be honored.



                                       B-6

<PAGE>
                                                                       Exhibit C


                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES

ADOPTION OF RIGHTS PLAN

                  On August 3, 1999, the Board of Directors of American  Pacific
Corporation (the "Company")  declared a dividend of one preferred share purchase
right (a "Right") for each  outstanding  common share,  par value $.10 per share
(the  "Common  Shares"),  of  the  Company.  The  dividend  is  payable  to  the
stockholders  of record at the close of business on August 16, 1999 (the "Record
Date").  Each Right entitles the registered  holder to purchase from the Company
one  one-hundredth of a share of Series D Participating  Preferred Stock,  $1.00
par value (the "Preferred Shares"),  of the Company at a price of $24.00 per one
one-hundredth  of  a  Preferred  Share  (the  "Purchase   Price"),   subject  to
adjustment.  The  description  and terms of the Rights are set forth in a Rights
Agreement  (the  "Rights  Agreement")  between the Company  and  American  Stock
Transfer & Trust Company, as Rights Agent (the "Rights Agent").

                  The Rights have certain anti-takeover  effects. The Rights may
cause  substantial  dilution  to a person or group that  attempts to acquire the
Company on terms not approved by the Board of Directors,  except  pursuant to an
offer  conditioned on a substantial  number of Rights being acquired or redeemed
by the  Company.  The  Rights  should  not  interfere  with any  merger or other
business combination approved by the Board of Directors,  because of the Board's
ability to redeem the Rights, as discussed below.

RIGHTS ATTACH TO COMMON SHARES INITIALLY

         Initially and until a Distribution Date (as defined below) occurs,  the
Rights are  attached to all Common  Shares and no separate  Rights  certificates
will be issued. During this initial period:

         -        The Rights are not exercisable;

         -        Holders of Rights have no voting  rights  with  respect to the
                  Rights;

         -        The Rights are transferred  with the Common Shares and are not
                  transferable separately from the Common Shares;

         -        No dividends are payable on the Rights;



                                       C-1

<PAGE>

         -        Common  Share  certificates  or book  entry  shares  hereafter
                  issued will contain a notation  incorporating by reference the
                  Rights Agreement;

         -        The  transfer  of  any  Common  Shares  also  constitutes  the
                  transfer of the Rights; and

         -        The Rights  expire on August 2, 2009 (the  "Expiration  Date")
                  unless  earlier  redeemed  or  exchanged  by  the  Company  as
                  described below.

DISTRIBUTION OF RIGHTS

         Separate  certificates  evidencing the Rights will be mailed to holders
of record of the Common Shares on the "Distribution Date." The Distribution Date
is the earlier to occur of the following two events:

         -        The  tenth  business  day after a public  announcement  that a
                  person  or group  of  affiliated  or  associated  persons  has
                  acquired or  obtained  the right to acquire 20 percent or more
                  of  the  outstanding  Common  Shares  (except  pursuant  to  a
                  Permitted Offer or a Qualifying  Offer, each as defined in the
                  Rights Agreement); or

         -        The tenth  business day after the  commencement  of, or public
                  disclosure  of an  intention  to  commence,  a tender offer or
                  exchange  offer by a person  other  than an exempt  person if,
                  upon  consummation  of the offer,  such person  could  acquire
                  beneficial  ownership of 20 percent or more of the outstanding
                  of Common Shares.

RIGHT TO PURCHASE COMPANY SHARES

         If a person  or group  acquires  or  obtains  the right to  acquire  20
percent or more of the outstanding Common Shares (thereby becoming an "Acquiring
Person") each holder of a Right  (except those held by the Acquiring  Person and
its affiliates and associates)  will have the right to purchase,  upon exercise,
Common  Shares (or, in certain  circumstances,  Preferred  Shares,  Common Share
equivalents or cash) having a value equal to two times the exercise price of the
Right.  In other words,  the Rights holders other than the Acquiring  Person may
purchase Common Shares at a fifty percent (50%) discount.

         For  example,  at the exercise  price of $24 per Right,  each Right not
owned by an Acquiring  Person would  entitle its holder to purchase $48 worth of
Common  Shares (or other  consideration,  as noted  above)  for $24.  Assuming a
market  value of $12 per  Common  Share at such  time,  the holder of each valid
Right would be entitled to purchase four Common Shares for $24.



                                       C-2

<PAGE>
RIGHTS TO PURCHASE ACQUIRING PERSON STOCK

         In the event that,  at the time or after a person  becomes an Acquiring
Person,  the Company is involved in a merger or other  business  combination  in
which (i) the  Company  is not the  surviving  entity,  (ii)  Common  Shares are
changed or exchanged,  or (iii) 50 percent or more of the Company's consolidated
assets or earning power are sold, then each Right (other than Rights that are or
were owned by the Acquiring  Person and certain related persons and transferees,
which will  thereafter be void) shall  thereafter be exercisable for a number of
shares of common  stock of the  Acquiring  Person  having a market  value of two
times the  exercise  price of the Right.  In other  words,  a Rights  holder may
purchase the acquiring company's common stock at a fifty percent (50%) discount.

EXCHANGE OF COMPANY SHARES FOR RIGHTS

         At any time after any person or group  becomes an Acquiring  Person and
before the  Acquiring  Person  acquires  50  percent or more of the  outstanding
Common Shares, the Board of Directors may exchange the Rights (other than Rights
owned by the Acquiring Person which will have become void), in whole or in part,
at an exchange ratio of one Common Share,  or one  one-hundredth  of a Preferred
Share (or a Common Share equivalent), per Right (subject to adjustment).

REDEMPTION

         The Rights are  redeemable by the Company in whole but not in part at a
price of $.001 per Right at any time prior to the tenth  business day  following
the time that a person or a group has become an  Acquiring  Person  (subject  to
extension  by the  Board  of  Directors  for a  period  of time  up to,  but not
exceeding,  ten additional  days).  Immediately  upon  redemption,  the right to
exercise  will  terminate  and the only right of holders  will be to receive the
redemption price.

AMENDMENTS

         As long as the  Rights are  redeemable,  the terms of the Rights may be
amended by the Board of Directors in its  discretion  without the consent of the
Rights holders. After that time, no amendment may adversely affect the interests
of a Rights holder (other than the Acquiring Person).

TERMS OF PREFERRED SHARES

         The Preferred  Shares  purchasable upon exercise of the Rights will not
be redeemable.  Each Preferred Share will be entitled to a minimum  preferential
quarterly  dividend  payment  equal to the  greater of $100.00 per share and 100
times the dividend  declared per Common Share. In the event of liquidation,  the
holders of the  Preferred  Shares  will be  entitled  to a minimum  preferential
liquidation  payment equal to the greater of $100.00 per share and 100 times the
payment  made per Common  Share.  Each  Preferred  Share will have 100 votes per
share,  voting  together  with the Common  Shares.  In the event of any  merger,
consolidation or


                                       C-3

<PAGE>
other  transaction  in which Common Shares are exchanged,  each Preferred  Share
will be entitled to receive 100 times the amount received per Common Share.

MISCELLANEOUS

         The Purchase Price payable, and the number and kind of securities, cash
or  other  property  issuable,  upon  exercise  of the  Rights  are  subject  to
adjustment  from time to time to  prevent  dilution  (i) in the event of a stock
dividend or  distribution  on, or a subdivision  or  combination  of, the Common
Shares,  (ii) upon the grant to holders of the Common Shares of rights,  options
or warrants to subscribe for Common Shares or securities convertible into Common
Shares at less than the then current market price,  (iii) upon the  distribution
to holders of the Common Shares of securities,  cash,  evidences of indebtedness
or assets (excluding regular periodic cash dividends out of earnings or retained
earnings)  and (iv) in  connection  with  recapitalizations  of the  Company  or
reclassifications of the Common Shares.

         No fractional  Common Shares or Preferred Shares will be required to be
issued (other than fractions of Preferred Shares that are integral  multiples of
one one  hundredth  of a  Preferred  Share,  which may,  at the  election of the
Company, be evidenced by depositary receipts) and in lieu thereof, an adjustment
in cash will be made based on the  market  price of Common  Shares or  Preferred
Shares on the last trading date prior to the date of exercise.

         Because of the nature of the Preferred  Shares'  dividend,  liquidation
and voting rights,  the value of the one  one-hundredth  interest in a Preferred
Share that may be purchased upon exercise of each Right should  approximate  the
value of one Common Share.

         A copy of the Rights  Agreement has been filed with the  Securities and
Exchange  Commission as an Exhibit to an application  for  registration  on Form
8-A.  A copy of the  Rights  Agreement  is  available  free of  charge  from the
Company.  This summary description of the Rights does not purport to be complete
and is qualified in its entirety by reference to the Rights Agreement,  which is
incorporated herein by reference.


                                       C-4


                    [AMERICAN PACIFIC CORPORATION LETTERHEAD]


                                                                 August 16, 1999


To Our Stockholders:

         Your Board of Directors has recently  declared a dividend of Preference
Share Purchase Rights (the "Rights"), thereby creating a Stockholder Rights Plan
(the  "Plan").  This letter  describes the Plan and the reasons of the Company's
Board of Directors  (the  "Board") for adopting it. We have  enclosed  with this
letter a summary description of the principal features of the Plan.

         The Rights contain  provisions to protect  stockholders in the event of
an unsolicited attempt to acquire the Company,  including a gradual accumulation
of shares in the open market,  a partial or two-tier  tender offer that does not
treat all stockholders  equally, a squeeze-out merger and other abusive takeover
tactics which the Board believes are not in the best interests of  stockholders.
These  tactics  unfairly  pressure  stockholders,  squeeze  them  out  of  their
investment  without  giving them any real  choice and  deprive  them of the full
value of their shares.

         Over 2,000 companies,  including  approximately  60% of the Fortune 500
companies,  have  issued  rights to protect  their  stockholders  against  these
tactics.  We consider the Plan to be the best available means of protecting both
your right to retain your equity investment in the Company and the full value of
that investment, while not foreclosing a fair acquisition bid for the Company.

         The Rights are not  intended  to prevent a takeover  of the Company and
will not do so. However, they should deter any attempt to acquire the Company in
a manner or on terms not approved by the Board.  The Rights are designed to deal
with the very serious problem of another person or company using abusive tactics
to deprive the Company's Board and its  stockholders of any real  opportunity to
determine the destiny of the Company.

         The Rights may be  redeemed  by the Board for $.001 per Right  prior to
the accumulation, through open-market purchases, a tender offer or otherwise, of
20% or more of the  Company's  shares by a single  acquiror or group,  and for a
period  of ten  days  (subject  to  extension  for up to  ten  additional  days)
thereafter.  Because of the redemption feature,  the Rights should not interfere
with any merger or  business  combination  approved  by the Board  prior to that
time.

         The Board  believes that the issuance of the Rights does not in any way
weaken the  financial  strength of the Company or  interfere  with its  business
plans.  The  issuance  of the Rights  has no  dilutive  effect,  will not affect
reported  earnings per share,  is not taxable to the Company or to you, and will
not change the way in which you can  presently  trade the Company's  shares.  As
explained in detail in the Summary of Rights delivered herewith, the Rights will
only be exercisable if and when a problem arises with which they were created to
deal. They will then operate to protect you


<PAGE>


against  being  deprived  of your  right to share  in the full  measure  of your
Company's long-term potential.

         The Board was  aware  when it acted  that  some  people  have  advanced
arguments  that  securities  of  the  sort  we  are  issuing  deter   legitimate
acquisition  proposals.  We carefully  considered these views and concluded that
the arguments are speculative and do not justify  leaving  stockholders  without
any  protection  against  unfair  treatment by an acquiror,  who,  after all, is
seeking his own  advantage,  not yours.  The Board  believes  that these  Rights
represent a sound and  reasonable  means of  addressing  the  complex  issues of
corporate governance and policy.

         While,  as noted  above,  the  distribution  of the Rights  will not be
taxable to you or the Company,  stockholders  may recognize  taxable income upon
the occurrence of certain subsequent events.

         In declaring the Rights  dividend,  we have expressed our confidence in
the future of the Company and our determination  that you, our stockholders,  be
given every opportunity to participate fully in that future.

                                           The Board of Directors of
                                           American Pacific Corporation


                                       -2-



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