NALCO CHEMICAL CO
424B3, 1996-05-20
MISCELLANEOUS CHEMICAL PRODUCTS
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                              Registration #33-9934
                                 Rule 424(b)(3)



PROSPECTUS
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Nalco Chemical Company

DIVIDEND REINVESTMENT
AND STOCK PURCHASE PLAN

1,000,000 SHARES OF COMMON STOCK
(Par Value $0.1875 Per Share)

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THESE  SECURITIES  HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND 
EXCHANGE  COMMISSION NOR HAS THE COMMISSION OR ANY STATE
SECURITIES  COMMISSION  PASSED UPON THE  ACCURACY OR ADEQUACY OF THIS  
PROSPECTUS.  ANY  REPRESENTATION  TO THE  CONTRARY IS A CRIMINAL OFFENSE.
--------------------------------------------------------------------------------

Nalco Chemical Company (the "Company")  hereby offers to eligible holders of its
Common Stock the opportunity to purchase  shares of its Common Stock,  par value
$0.1875  per  share,  with  cash  dividends  automatically  reinvested  and with
optional  cash  payments of up to $60,000 per calendar  year. No service fees or
brokerage  commissions  will be charged to participants for purchases made under
the Nalco Chemical  Company  Dividend  Reinvestment and Stock Purchase Plan (the
"Plan")  except  in  connection  with  automatic  monthly   investments  through
withdrawals from a predesignated account.

All  stockholders  of record of Common Stock are eligible to  participate in the
Plan.  Owners of Common  Stock whose shares are  registered  in names other than
their own, such as a broker or nominee,  must either arrange with the registered
owners to have all or a portion of their dividends  reinvested or become holders
of record  by  having  those  shares  registered  in their own names in order to
reinvest  dividends  under the Plan.  Such owners whose shares are registered in
other names and who desire to make optional cash payments must become holders of
record.

The shares purchased under the Plan may be newly-issued  shares,  shares held by
the Company as treasury stock or shares  purchased for  participants in the open
market  by First  Chicago  Trust  Company  of New York,  as agent.  The price of
authorized  but unissued  shares of Common Stock and shares of Common Stock held
as treasury  stock  purchased for  participants  in the Plan will be 100% of the
average  of the high and low  sales  prices  of the  Company's  Common  Stock as
reported on the New York Stock  Exchange-Composite  Transactions on the relevant
Investment Date (as hereinafter  defined).  If no trading occurs on the New York
Stock  Exchange on the relevant  Investment  Date,  the purchase price per share
will be determined  by the Company on the basis of such market  quotations as it
deems  appropriate.  In no event will the purchase  price of such shares be less
than par value.  The price of shares of Common Stock purchased for  participants
in the Plan on the open market will be the weighted average price of such shares
purchased for the relevant Investment Date.

Further  information  concerning  the  Plan is set  forth  herein  under  "Nalco
Chemical Company Dividend Reinvestment and Stock Purchase Plan".
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The date of this Prospectus is May 20, 1996.

<PAGE>


AVAILABLE INFORMATION
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The  Company  is  subject  to the  information  requirements  of the  Securities
Exchange Act of 1934 (the "Exchange  Act") and, in accordance  therewith,  files
reports and other  information with the Securities and Exchange  Commission (the
"Commission").

Such reports,  proxy and  information  statements and other  information  may be
inspected and copied at the offices of the Commission at 450 Fifth Street, N.W.,
Washington,  D.C.;  and at its  regional  Offices,  1500  West  Madison  Street,
Chicago,  Illinois  60661 and World Trade  Center,  New York,  New York,  10048.
Copies of such material may be obtained from the Public Reference Section of the
Commission in Washington,  D.C. 20549 at prescribed rates. In addition, reports,
proxy and information  statements and other  information  concerning the Company
may be inspected at the offices of the New York and the Chicago Stock  Exchanges
on which the Common Stock of the Company is listed.

INCORPORATION BY REFERENCE
--------------------------------------------------------------------------------

The following  documents,  which have  heretofore been filed by the Company with
the Commission  pursuant to the Exchange Act, are  incorporated  by reference in
this Prospectus and shall be deemed to be a part hereof:

        (a)Annual Report on Form 10-K for the year ended December 31, 1995.

       (b) Description  of  Preferred  Share  Purchase  Rights  included  in the
           Registration  Statement on Form 8-A filed August 1, 1986, Forms 8 and
           8-K filed July 6, 1989 and Form 8-K filed May 15, 1989.

All  documents  filed by the  Company  with the  Commission  pursuant to Section
13(a),  13(c),  14 or 15(d) of the Exchange Act  subsequent  to the date of this
Prospectus and prior to the  termination of the offering made by this Prospectus
shall be deemed to be  incorporated  herein by reference and to be a part hereof
from the date of filing such documents.

The Company hereby undertakes to provide without charge to each person to whom a
copy of the Prospectus has been delivered  (including any beneficial  owner), on
the  written or oral  request of any such  person,  a copy of any and all of the
documents  referred  to above  which  have been or may be  incorporated  in this
Prospectus  by  reference,  other than  exhibits to such  documents  unless such
exhibits are specifically  incorporated by reference in the information that the
Registration  Statement  incorporates.   Requests  should  be  directed  to  the
Secretary,  Nalco  Chemical  Company,  One Nalco  Center,  Naperville,  Illinois
60563-1198,  the Company's principal executive offices.  The Company's telephone
number is 708/305-1000 and beginning August 3, 1996 the telephone number will be
630/305-1000..

THE COMPANY
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Nalco  Chemical  Company  was  incorporated  in  1928  in  Delaware  and has its
principal   executive  offices  at  One  Nalco  Center,   Naperville,   Illinois
60563-1198.  Its telephone  number is 708/305-1000  and beginning August 3, 1996
the telephone number will be 630/305-1000.

The  Company  is  engaged  primarily  in the  manufacture  and  sale  of  highly
specialized  service  chemicals.  This  includes  the  production  and  sale  of
chemicals,  technology and services,  and systems  (monitoring and surveillance)
used in water treatment,  pollution control,  energy conservation,  steelmaking,
papermaking,  mining  and  mineral  processing,  electricity  generation,  other
industrial processes, and commercial building utility systems.


NALCO CHEMICAL COMPANY DIVIDEND
REINVESTMENT AND STOCK PURCHASE PLAN
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Introduction
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The Plan consists in its entirety of the questions and answers appearing below.

The Plan
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1. What is the Plan?

The Plan provides that the Company's  eligible  stockholders  can  automatically
invest their cash  dividends  from some or all of their shares of the  Company's
Common Stock in additional  shares of Common Stock.  Eligible  stockholders  may
also make optional cash payments to purchase  additional  shares of Common Stock
in amounts  from $25 up to an  aggregate  of $60,000  per  calendar  year.  (See
Question 14.)

2. What is the purpose of the Plan?

The Plan  offers a  convenient  method for  eligible  stockholders  to invest in
shares of the Company's Common Stock without payment of any brokerage commission
or service  charge  except in  connection  with  automatic  monthly  investments
through  withdrawals  from  a  predesignated   account.  Funds  from  reinvested
dividends  and optional cash payments are intended to be used by the Company for
general  corporate  purposes  or to  purchase  shares  in the  open  market  for
participants. (See Question 4 and "Use of Proceeds".)

Administration
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3. Who will administer the Plan for participants?

First  Chicago  Trust  Company of New York  ("First  Chicago"),  a  wholly-owned
subsidiary  of First  Chicago  NBD  Corporation,  will  administer  the Plan for
participants,  keep records for the Plan,  perform other duties  relating to the
Plan and mail statements of account to the participants.  Common Stock purchased
under the Plan will be registered in the name of First Chicago (or its nominee),
as agent for the  participants in the Plan, and will be credited to the accounts
of the  respective  participants.  As record holder of Common Stock held for the
benefit of participants  under the Plan, First Chicago will receive dividends on
all shares of Common Stock held under the Plan on the dividend record date, will
credit  such  dividends  to  participants'  accounts  on the  basis  of full and
fractional shares held in their accounts,  and will automatically  reinvest such
dividends in shares of Common Stock. Certificates for any number of whole shares
credited  to an  account  under the Plan will be  issued to a  participant  upon
written request. (See Question 20.)

Purchases
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4. What is the source of Common Stock purchased under the Plan?

Shares of Common Stock will be, at the Company's  discretion,  purchased  either
directly from the Company,  in which event such shares will be either authorized
but unissued shares or shares held by the Company as treasury stock,  or, on the
open market, or by combination of the foregoing.

5. When will shares be purchased under the Plan?

Purchases from the Company of authorized but unissued shares of Common Stock and
shares held as treasury stock will be made on the relevant  Investment  Date (as
defined in the next paragraph).  If the Company elects to cause First Chicago to
make  purchases on the open market,  such purchases will begin on the Investment
Date and will be  completed  no later than 30 days from such date  except  where
completion  at a later  date is  necessary  or  advisable  under any  applicable
regulatory  requirements.  Such  open  market  purchases  may  be  made  on  any
securities  exchange where such shares are traded or by negotiated  transactions
and may be subject to such terms with respect to price,  delivery and  otherwise
as First Chicago may agree to. Neither the Company nor any Plan participant will
have any  authority  or power to direct the time or price at which shares may be
purchased,  or the  selection  of the  broker  or  dealer  through  or from whom
purchases are to be made.

An  Investment  Date in any month in which a dividend  is paid is the  Company's
dividend payment date and in any other month will be the 10th day of such month.
If the  Investment  Date  falls on a date when the New York  Stock  Exchange  is
closed,  the Investment Date will be the first day  immediately  succeeding such
date on which the Exchange is open.

6. What is the purchase price of the shares?

The price of authorized but unissued shares of Common Stock and shares of Common
Stock held as treasury stock purchased for participants in the Plan will be 100%
of the average of the high and low sales prices of the Company's Common Stock as
reported on the New York Stock  Exchange-Composite  Transactions on the relevant
Investment  Date.  If no  trading in Common  Stock  occurs on the New York Stock
Exchange on the relevant  Investment  Date, the purchase price per share will be
determined  by the  Company on the basis of such market  quotations  as it deems
appropriate.  In no event will the  purchase  price for such shares be less than
par value.

The price of shares of Common Stock  purchased for  participants  in the Plan on
the open market will be the weighted  average price of shares  purchased for the
relevant Investment Date.

7. How many shares will be purchased for the participant?

In accordance with the stockholder's  selection on the Enrollment  Authorization
Form, cash dividends  invested,  including dividends received on shares credited
to the participant's  account under the Plan, and optional cash payments will be
used to purchase  Common  Stock for the  participant's  account.  Both whole and
fractional  shares will be purchased,  with the latter computed to three decimal
places.  Shares purchased,  including fractional shares, will be credited to the
participant's  account.  The number of shares,  including  fractional shares, so
purchased  will  depend  on the  amount of  dividends  invested,  the  amount of
optional  cash  payments,  if any, and the price per share as  determined  under
Question 6.

Advantages
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8. What are the advantages of the Plan?

Participants  in the Plan may (1) reinvest the cash dividends from all shares of
Common Stock registered in their names in additional shares of Common Stock, and
may also  invest  additional  amounts  by making  optional  cash  payments,  (2)
reinvest the cash dividends  from some of the shares of Common Stock  registered
in their names,  and may also make  optional cash  payments,  or (3) continue to
receive all cash dividends  from shares  registered in their names and invest by
making optional cash payments.  (See Question 12.) Optional cash payments may be
made in amounts from $25 up to an aggregate of $60,000 per calendar  year.  (See
Question 14.) In addition to eliminating brokerage commissions,  service charges
(except in connection with automatic  monthly  investments  through  withdrawals
from a predesignated  account) and other expenses for participants in connection
with shares  purchased under the Plan,  participants  achieve full investment of
funds, because the Plan permits fractions of shares, as well as whole shares, to
be credited to participants' accounts. (See Question 7.) Moreover,  participants
may avoid  safekeeping  of  certificates  evidencing  shares  credited  to their
accounts and thus be protected  against the risks of loss,  theft or destruction
of such  certificates.  Statements of account will be issued after each purchase
to provide simplified record keeping.

Participation in the Plan
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9. Who is eligible to participate in the Plan?

All  stockholders  of record of Common Stock are eligible to  participate in the
Plan.  Owners of Common  Stock whose shares are  registered  in names other than
their own, such as a broker or nominee,  must either arrange with the registered
owners to have all or a portion of their dividends  reinvested or become holders
of record  by  having  those  shares  registered  in their own names in order to
reinvest  dividends  under the Plan.  Such owners whose shares are registered in
other names and who desire to make optional cash payments must become holders of
record in order to make such optional cash payments. (See Question 14.)

The Company has made arrangements with First Chicago to facilitate  reinvestment
of dividends under the Plan by record holders such as brokers and nominees, on a
per-dividend basis, on behalf of beneficial owners. (See Question 13.)

10. How does an eligible stockholder participate?

Any  eligible  stockholder  may join  the Plan by  completing  and  signing  the
Enrollment  Authorization  Form accompanying this Prospectus and returning it to
First Chicago. A postage-paid envelope is provided for this purpose.  Additional
Enrollment Authorization Forms may be obtained at any time by written request to
First Chicago Trust Company at P.O. Box 2598, Jersey City, New Jersey 07303-2598
or by calling the toll free number 1-800-446-2617.

A  broker  or  nominee  may  reinvest  dividends  under  the Plan on  behalf  of
beneficial  owners  by  signing  and  returning  to  First  Chicago  either  the
Enrollment  Authorization Form or the Broker and Nominee Authorization Form (the
"B&N Form"). (See Question 13.)

11. When may an eligible stockholder join the Plan?

An eligible  holder of Common  Stock may join the Plan at any time.  Once in the
Plan,  such  stockholder  will  remain  a  participant  until  such  stockholder
discontinues  participation.  If an  Enrollment  Authorization  Form  requesting
reinvestment  of dividends is received by First  Chicago on or before the record
date established for a particular dividend, reinvestment will commence with that
dividend. Dividend record dates for Common Stock (and the related payment dates)
are anticipated to be as follows in 1996.  Future  dividends are contingent upon
Board approval.

                   Record Date (Date by                  Payment Date (Date on
                 which Enrollment Authorization            or after which
                       Form must be                          dividend will
                         received)                           be reinvested)
                      February 20, 1996                     March 8, 1996
                      May 20, 1996                          June 10, 1996
                      August 20, 1996                       September 10, 1996
                      November 20, 1996                     December 10, 1996

It is anticipated  that  subsequent  dividend record dates and payment dates for
Common Stock will occur on approximately the same dates each year.

If an Enrollment  Authorization  Form is received  from an eligible  stockholder
after the record date established for a particular dividend, the reinvestment of
dividends will begin on the dividend payment date following the next record date
if such stockholder is still a holder of record.


12. What does the Enrollment Authorization Form provide?

The Enrollment Authorization Form provides for the purchase of additional shares
of Common Stock through the following investment options:
    If "Full Dividend  Reinvestment"  is elected,  the Enrollment  Authorization
    Form directs First Chicago to apply all the cash dividends on all the shares
    then or subsequently  registered in a participant's  name, together with any
    optional cash payments, toward the purchase of additional Common Stock.

    If "Partial Dividend  Reinvestment" is elected, First Chicago will apply all
    the  cash  dividends  on  only  the  number  of  shares  registered  in  the
    Participant's name that are specified on the Enrollment  Authorization Form,
    together with any optional cash payments,  toward the purchase of additional
    Common Stock.

    If "Optional Cash Payments Only" is elected,  the participant  will continue
    to receive  cash  dividends on shares  registered  in his or her name in the
    usual manner,  and First Chicago will apply optional cash payments  received
    toward the purchase of additional Common Stock.

Selection of the "Full Dividend Reinvestment" or "Partial Dividend Reinvestment"
options will not preclude an eligible stockholder from also making optional cash
payments.

The  Enrollment  Authorization  Form further  directs  First Chicago to reinvest
automatically any subsequent  dividends on shares held in the participant's Plan
account.  Under the Plan,  dividends will be reinvested on a cumulative basis on
the shares  designated on the  Enrollment  Authorization  Form and on all shares
held in the Plan account,  until a participant  specifies otherwise or withdraws
from the Plan altogether, or until the Plan is terminated.

If the participant has authorized "Full Dividend  Reinvestment,"  cash dividends
with respect to shares  withdrawn from a participant's  account will continue to
be  reinvested.  If,  however,  cash  dividends with respect to only part of the
shares registered in a participant's  name are being  reinvested,  First Chicago
will  continue to reinvest  dividends on only the number of shares  specified by
the  Participant  on the Enrollment  Authorization  Form unless a new Enrollment
Authorization  Form specifying a different  number of shares is delivered.  If a
participant  disposes of shares of stock while  participating  under the partial
dividend  reinvestment  option  above such that the new share total is less than
the  number  of shares  specified  on the  Enrollment  Authorization  Form,  all
dividends paid on shares of stock registered in the  stockholder's  name will be
reinvested.

If a change in method of participation  is desired,  the participant need simply
file a new Enrollment  Authorization Form indicating the method of participation
to continue thereafter.  The Enrollment Authorization Form must be signed by all
registered owners of the stock.

13. What does the B&N Form provide?

The B&N Form (for  brokers and  nominees)  provides a means  whereby a broker or
nominee may inform First Chicago each time the Company  declares a cash dividend
of  the  names  of  participating  beneficial  owners  and  specify  as to  each
beneficial  owner the number of shares of Common Stock with respect to which the
dividend is to be  reinvested.  The B&N Form,  therefore,  unlike the Enrollment
Authorization  Form,  contemplates new instructions to First Chicago each time a
dividend is declared.  First Chicago,  on the Investment Date, will reinvest the
dividend  payable with  respect to the number of shares  specified in the record
holder's  instructions  for each  identified  beneficial  owner in as many whole
shares of Common Stock as can be purchased in accordance  with the Plan. As soon
as practical  following the Investment  Date, First Chicago will transmit to the
record holder  information  with respect to each  beneficial  owner for whom the
record  holder  has  requested  dividend  reinvestment  showing  as to each such
beneficial  owner:  (a) the number of shares  specified for  reinvestment of the
dividend,  (b) the total  dividend  paid with  respect to such  shares,  (c) the
number of whole shares  purchased,  (d) the total cost of the shares  purchased,
(e) the amount of the total  dividend not  reinvested,  (f) the  aggregate  fair
market value of the shares  purchased and (g) the total dividend  reportable for
federal  income tax  purposes.  Accompanying  such  information  will be a share
certificate,  registered in the name of the record holder,  for the total number
of shares  purchased  for each of such  beneficial  owners,  and a check for the
aggregate amount of the dividend not reinvested for such beneficial owners.

The B&N Form and appropriate  instructions must be received by First Chicago not
later than the fifth business day following the record date for such dividend or
no dividends will be reinvested based on such B&N Form.

Optional Cash Payments
--------------------------------------------------------------------------------
14. What is the procedure for making optional cash payments?

Any  stockholder  of record is  eligible to make  optional  cash  payments  upon
joining the Plan. Cash payments must be a minimum of $25 each and may not exceed
an aggregate of $60,000 per calendar year. First Chicago will apply any optional
cash  payment  received  from a  participant  before an  Investment  Date to the
purchase of Common Stock for the account of the  participant on such  Investment
Date if the Common Stock is purchased  from the Company and as soon as practical
after such Investment Date if such Common Stock is purchased on the open market.

Brokers or nominees  participating on behalf of beneficial owners cannot utilize
the optional cash payment provision of the Plan. Therefore,  if shares of Common
Stock are held by a broker or  nominee  and the owner of such  shares  wishes to
participate  in the optional cash payment  feature of the Plan,  such owner must
become a stockholder of record by having all or a part of such shares registered
in such owner's name.  The owner must then enroll such shares in the Plan.  (See
Questions 10 and 11.)

If the "Optional Cash Payments Only" box on the  Enrollment  Authorization  Form
has been checked,  the Company will pay cash  dividends on shares  registered in
the participant's name to the participant in the usual manner.

An initial  optional cash payment may be made by a participant  upon joining the
Plan by enclosing a check or money order with the Enrollment  Authorization Form
and by returning it to First Chicago. Thereafter,  optional cash payments may be
made using cash  payment  forms  which will be sent to  participants  with their
statements  of account.  Checks or money orders should be made payable to "First
Chicago - Nalco Chemical".

NO INTEREST WILL BE PAID ON OPTIONAL CASH PAYMENTS.  Therefore,  it is suggested
that  optional  cash  payments  be sent  to  First  Chicago  shortly  before  an
Investment Date. Reasonable mail delay time should be taken into account so that
receipt by First Chicago is on a timely basis.

Participants  may  also  make  optional  cash  payments  by  automatic   monthly
investments  of a specified  amount (not less than $25 per  transaction  or more
than $60,000 per calendar  year)  through an Automated  Clearing  House  ("ACH")
withdrawal  from a  predesignated  account.  A  $1.00  transaction  fee  will be
subtracted  from the amount drawn from the  participant's  bank account prior to
each investment.  To initiate automatic monthly  deductions,  a participant must
complete and sign an Automatic Monthly Deduction Form ("Authorization Form") and
return  it to First  Chicago  together  with a voided  blank  check or a savings
account  deposit  slip for the account  from which funds are to be drawn.  Forms
will be processed  and will become  effective as promptly as  practicable.  Once
automatic  monthly  deductions  are  initiated,  funds  will be  drawn  from the
participant's account three business days preceding each Investment Date.

A participant may change or terminate automatic monthly deductions by completing
and  submitting to First Chicago a new  Authorization  Form.  When a participant
transfers shares or otherwise  establishes a new account,  an Authorization Form
must be completed for the new account. If a participant closes or changes a bank
account number, a new Authorization Form must be completed. To be effective with
respect to a particular  Investment Date,  however,  the new Authorization  Form
must be received  by First  Chicago at least six  business  days  preceding  the
Investment Date.

A request to return  optional cash payments will be honored if a written request
is received by First Chicago at least 48 hours before the  Investment  Date. The
same amount of cash need not be sent each time an optional  cash payment is made
and there is no obligation to make optional cash payments.

Costs
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15. What are the costs to a participant in the Plan?

A  participant  will  incur no  brokerage  commissions  or service  charges  for
purchases  made  under the Plan,  except a $1.00  transaction  fee if  automated
monthly  investments  are  made.  All  costs of  administration  of the Plan and
brokerage  commissions  or  service  charges  incurred  in  connection  with the
purchase of shares will be paid by the Company.  A service fee and any brokerage
commissions or transfer taxes in connection  with a sale by First Chicago of all
or a part of the shares held for a participant under the Plan will be charged to
such participant. (See Question 16.)

Withdrawal
--------------------------------------------------------------------------------
16. How does a participant withdraw from the Plan?

In order to withdraw from the Plan, a  participant  must notify First Chicago in
writing or by  telephone  of the desire to withdraw.  Written  notice  should be
addressed to First Chicago Trust Company, P.O. Box 2598, Jersey City, New Jersey
07303-2598.  In the event of  withdrawal,  or in the event of termination of the
Plan  by  the  Company,   a  certificate   for  whole  shares  credited  to  the
participant's  account  under the Plan will be issued and a cash payment will be
made for any  fractional  share based on the then  current  market  price of the
Company's Common Stock. Such payment will be less any brokerage commission.

A participant may withdraw some or all of the  participant's  shares held in the
participant's  account under the Plan. If a participant  requests, a certificate
for all or a  portion  of the  participant's  shares  held in the  participant's
account under the Plan will be issued in the  participant's  name. (See Question
20.) If a participant  so requests,  First Chicago will sell all or a portion of
any shares credited to such participant's  account under the Plan, and remit the
proceeds,  less a service fee, any related  brokerage  commission  and any other
costs of sale, to the participant. Participants may direct their requests to the
above address or by phoning toll free 1-800-446-2617

17. When may a participant withdraw from the Plan?

Participants may withdraw from the Plan at any time. If a request to withdraw is
received by First  Chicago on or after the record  date for a dividend  payment,
First Chicago, in its sole discretion,  may either pay any such dividend in cash
or reinvest it in Common Stock on behalf of the withdrawing participant. If such
dividend is  reinvested,  First Chicago may sell the shares  purchased and remit
the proceeds to the participant,  less any brokerage commission, any service fee
and any other costs of sale.  Any optional  cash  payments sent to First Chicago
prior to the request to  withdraw  will also be  invested  unless  return of the
amount is  expressly  requested  in the request to withdraw  and such request is
received at least 48 hours before the dividend payment date.

After  withdrawing  from the Plan, a stockholder  may re-enroll by sending a new
Enrollment Authorization Form to First Chicago. (See Questions 10 and 11.)


Account Statements
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18. How will the participant be advised of purchases of Common Stock?

Each  participant  in the Plan will  receive a  statement  of account as soon as
practicable  after each Investment  Date.  These  statements are a participant's
continuing  record of the cost of shares  purchased  and should be retained  for
income tax purposes.

Each  participant  will  receive  copies  of all  communications  sent to  other
stockholders   including   the  Company's   Annual  and  Quarterly   Reports  to
Stockholders,  Notices of Annual and Special  Meetings of Stockholders and Proxy
Statements and income tax information for reporting dividends paid.

Dividends
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19. Will participants be credited with dividends on shares held in their
 account under the Plan?

Yes. The Company pays dividends,  as declared,  to the stockholders of record of
all its shares of Common Stock.  As the holder of record for Plan  participants,
First Chicago,  as agent, will receive dividends for all Plan shares held on the
record date. It will credit such dividends received to participants' accounts on
the basis of full and fractional shares held in their accounts,  and will invest
such dividends in additional shares of Common Stock.

Stock Certificates
--------------------------------------------------------------------------------
20. Will stock certificates be issued for shares of Common Stock purchased?

Normally,  certificates  for shares of Common Stock purchased and held under the
Plan will not be issued to  participants.  The number of shares  credited  to an
account under the Plan will be shown on the participant's  statement of account.
This service protects against loss, theft or destruction of stock certificates.

Certificates  for any number of whole  shares  credited to an account  under the
Plan will be issued upon the written or telephone request of a participant.  Any
remaining full shares and fractional  shares will continue to be credited to the
participant's account.

Shares  credited  to an account of a  participant  in the Plan and held by First
Chicago may not be pledged or otherwise  hypothecated.  A participant who wishes
to pledge such shares must first request that a  certificate  for such shares be
issued.

When certificates are issued,  they will be registered in the participant's name
as shown in the  Company's  records.  Certificates  for  shares  purchased  with
dividends  reinvested  pursuant  to  instructions  received on B&N Forms will be
delivered to the holder of record.
(See Question 13.)

Certificates for fractional shares will not be issued under any circumstances.

21.  May stock certificates be deposited with shares held under the Plan?

A participant may deposit with First Chicago any Common Stock  certificates  now
or hereafter  registered  in the  participant's  name for credit under the Plan.
There is no charge for this  custodial  service and, by making the deposit,  the
participant  will  be  relieved  of  the   responsibility  for  loss,  theft  or
destruction of the certificate.

First Chicago provides insurance coverage on certificates mailed by participants
to First  Chicago  for  safekeeping  in Plan  accounts in certain  instances  as
described  below.  Certificates  sent to First Chicago for deposit should not be
endorsed. To be eligible for certificate mailing insurance, certificates must be
mailed in brown,  pre-addressed  return  envelopes  supplied  by First  Chicago.
Certificates  mailed in this manner are insured for up to $25,000 current market
value provided they are mailed first class. First Chicago will promptly send the
Service User a statement confirming each deposit of certificates.  First Chicago
must be notified of any claim within  thirty (30)  calendar days of the date the
certificates  were mailed.  To submit a claim,  a stockholder  must be a current
participant  or the  stockholder's  loss must be  incurred  in  connection  with
becoming a participant. In the latter case, the claimant must enroll in the Plan
at the time the insurance claim is processed.  The maximum insurance  protection
provided is $25,000 and coverage is available only when the  certificate(s)  are
sent to First Chicago in accordance  with the guidelines  described  above.  For
information about mailing  certificates to First Chicago having a current market
value in excess of $25,000, contact First Chicago.

If a participant does not use the brown pre-addressed envelope provided by First
Chicago,  certificates should be sent to the address listed below via registered
mail, return receipt requested, and insured for possible mail loss for 2% of the
market value (minimum of $20.00);  this represents the  replacement  cost to the
participant.

Insurance  covers the  replacement  of shares of stock,  but in no way  protects
against any loss  resulting from  fluctuations  in the value of such shares from
the time the stockholder  mails the certificates  until such time as replacement
can be effected.

Whenever  certificates are issued to the participant either upon request or upon
termination of participation,  new,  differently  numbered  certificates will be
issued.  Dividends will be reinvested on shares  represented by the certificates
deposited with First Chicago.

Sales
--------------------------------------------------------------------------------
22.  How does a participant sell shares held under the Plan?

A participant may at any time,  including upon  withdrawal,  request the sale of
all or any whole  shares  held in his or her  account  under the Plan.  Any such
request may be made by either  writing to First Chicago or calling First Chicago
at  1-800-446-2617.  First  Chicago  will make every  effort to process all sale
orders  (written  and  telephone)  on the day it receives  them,  provided  that
instructions  are received before 1:00 p.m.  Eastern time on a business day when
First Chicago and the relevant  securities  markets are open.  The proceeds from
such sale, less a service fee, any brokerage commission,  and any other costs of
sale, will be remitted to the  participant.  Each sale request will be processed
and a check for the net  proceeds  will be mailed as promptly as possible  after
First Chicago receives such sale request.

Other Information
--------------------------------------------------------------------------------
23. What happens when participants sell or transfer all of the shares registered
    in their names on the books of the Company  other than shares held under the
    Plan?

When  participants  sell or transfer  all shares of Common Stock  registered  in
their names,  First  Chicago will continue to invest the dividends on the shares
credited to their accounts under the Plan until otherwise notified.

24. What happens if the Company has a rights offering?

In the case of a Common Stock rights offering,  Plan  participants  will receive
rights based upon whole shares of Common Stock  registered  in their names as of
the record date for any such rights offered,  and whole shares credited to their
accounts under the Plan as of the record date.



25. Are shares purchased under the Plan entitled to preferred share purchase
rights?

Each share of Common Stock, including each whole share purchased under the Plan,
is entitled to one preferred share purchase  right. If at any time  certificates
representing  preferred  share  purchase  rights are  distributed  to holders of
Common Stock,  First Chicago will distribute to participants  such  certificates
issued with respect to shares of Common Stock held in the Plan.

26. What happens if the Company issues a stock dividend or declares a stock
split?

Any stock dividend or split shares of Common Stock distributed by the Company on
shares credited to the account of a participant  under the Plan will be added to
the participant's account. Stock dividends or split shares distributed on shares
held directly by the participant and registered in the  participant's  name will
be mailed to such  participant in the same manner as to stockholders who are not
participating in the Plan.

27. What are the Federal income tax consequences of participation in the Plan?

In the case of reinvested  dividends,  when First Chicago  acquires shares for a
participant's account directly from the Company, the participant must include in
gross  income a  dividend  equal to the fair  market  value of the shares on the
relevant  dividend  payment date. The  participant's  basis in those shares will
also equal the fair market value of the shares on the relevant  dividend payment
date.

Alternatively,  when First Chicago  purchases  Common Stock for a  participant's
account on the open market with reinvested dividends, a participant must include
in gross income a dividend  equal to the actual  purchase price to First Chicago
of the shares plus that portion of any brokerage commissions paid by the Company
which  are  attributable  to the  purchase  of  the  participant's  shares.  The
participant's  basis in Plan shares held for his or her account will be equal to
their purchase price plus allocable brokerage commissions.

In the case of shares  purchased  directly  from the Company with  optional cash
investments,  the  participant  will not  realize  any  income  by reason of the
purchase,  and the participant's  basis in the shares so purchased will be their
cost.  In the case of shares  purchased  on the open market with  optional  cash
investments,  participants will be in receipt of a dividend to the extent of any
brokerage commissions paid by the Company. The participant's basis in the shares
acquired on the open market with  optional  investments  will be the cost of the
shares plus an allocable share of any brokerage commissions paid by the Company.

The holding  period for Plan shares will begin the day after the date the shares
are acquired.  A participant  will not realize any taxable income when he or she
receives  certificates for whole shares credited to his or her account under the
Plan,  either upon a request for such  certificates  or upon  withdrawal from or
termination of the Plan.  However,  a participant who receives,  upon withdrawal
from or  termination  of the Plan, a cash payment for the sale of Plan shares or
for a fractional share then held in his or her account will realize gain or loss
measured  by the  difference  between  the amount of the cash  received  and the
participant's  basis in such shares or fractional  share. Such gain or loss will
be capital in character if such shares or fractional  shares are a capital asset
in the hands of the participant.

Dividends distributed pursuant to the Plan may be subject to withholding, in the
same circumstances as regular dividends are subject to withholding.  In the case
of  foreign or other  stockholders  who are  subject to income tax  withholding,
dividends will be reinvested after the deduction of such withholding taxes.

For further  information as to tax  consequences of  participation  in the Plan,
participants should consult with their own tax advisors.




28. How many shares will be sold by the Company under the Plan?

Of the shares  registered  with the Securities  and Exchange  Commission for the
Plan,  the Company will sell as many shares as the  dividends  and optional cash
payments of participating  stockholders will purchase.  The Company  anticipates
that it will, from time to time, as required,  make additional  shares available
for purchase under the Plan. (See Question 31)

29. How will participants' shares held under the Plan be voted at meetings of
 stockholders?

For each meeting of stockholders,  participants  will receive proxies which will
enable  them to vote  shares  registered  in their  names and also whole  shares
credited to their accounts under the Plan.

30. Who interprets and regulates the Plan?

The Company  reserves  the right to interpret  and regulate the Plan,  as deemed
desirable or necessary, in connection with its operation.

31. May the Plan be modified or discontinued?

The Company  reserves the right to suspend,  modify or terminate the Plan at any
time.  Participants in the Plan will be notified of any suspension,  termination
or significant modification of the Plan. If the Plan is terminated,  shares held
in the participant's account will be distributed as described in Question 16.

32. What are the responsibilities of the Company and First Chicago under the 
Plan?

Neither the Company,  nor First Chicago,  as  administrator of the Plan, will be
liable for any good faith act or for any good faith omission to act,  including,
without limitation, any claim or liability arising out of failure to terminate a
participant's  account upon such participant's death, the prices at which shares
are purchased or sold for a participant's  account,  the times when purchases or
sales are made, or fluctuations in the market value of Common Stock.

The participants should recognize that neither the Company nor First Chicago can
assure them of a profit or protect them  against a loss on the shares  purchased
by them under the Plan. The Company has no obligation to purchase  shares issued
under the Plan.

33.  Who should be contacted with questions about the Plan?

All correspondence and inquiries concerning the Plan should be directed to:
                  First Chicago Trust Company
                  P.O. Box 2598
                  Jersey City, New Jersey  07303-2598

Telephone inquires should be directed to:
                  Stockholder customer service, including sale of shares: 
                  1-800-446-2617
                  Normal hours:  8:00 am - 10:00 pm, Eastern time, each 
                  business day
                  8:00 am - 3:30 pm, Eastern time, Saturdays

                  Customer Service  Representatives are available 9:00 am -6:00
                  pm, Eastern time, each business day.

                  Internet:  Messages forwarded on the Internet will be 
                responded to within one business day. The
                  First Chicago Internet address is "HTTP://WWW.FCTC.COM"

                  TDD: 1-201-222-4955 Telecommunications Device for the hearing
                    impaired.
                          DESCRIPTION OF CAPITAL STOCK

Common Stock
--------------------------------------------------------------------------------

The record holders of the Common Stock are entitled,  ratably, to such dividends
thereon as the Company's Board of Directors in its discretion may declare out of
funds  available  therefor;  are  entitled to receive pro rata all assets of the
Company  available for  distribution to stockholders in the event of liquidation
of the  Company;  are  entitled  to one vote for each  share  held;  and have no
preemptive  rights to purchase or subscribe  for any stock of the Company now or
hereafter   authorized  or  securities   convertible   into  Common  stock.  All
outstanding  shares of Common Stock,  including the shares offered  hereby,  are
fully paid and non-assessable. There is no charter restriction on the repurchase
by the Company of shares of its own stock.

Preferred Stock
--------------------------------------------------------------------------------

The  Company's  Restated  Certificate  of  Incorporation  permits  the  Board of
Directors of the Company, without further stockholder approval, to authorize the
issuance of up to 2,000,000 shares of Preferred  Stock,  $1.00 par value, and to
fix the various  rights,  preferences,  terms and  provisions  of each series of
Preferred  Stock so issued.  No such Preferred  Stock has been issued other than
Series B ESOP Convertible  Preferred Stock (the "ESOP Stock"),  of which 415,800
Shares  were  issued to the  Northern  Trust  Company  as  Trustee  of the Nalco
Chemical  Company  Employee Stock Ownership Plan (the "ESOP").  These shares are
subject to restrictions on transfer set forth in the Certificate of Designations
relating to the ESOP Stock and a stock purchase transfer agreement dated May 15,
1989. The shares are convertible into the Company's Common Stock in a 20-1 ratio
with the number of votes per share of ESOP  stock  equal to the shares of Common
Stock into which the ESOP Stock can be  converted.  Except  with  respect to the
preferred  share  purchase  rights  described  below,  there  are  presently  no
understandings,  agreements,  negotiations  or  discussions  which will or might
involve the possible issuance of Preferred Stock for any purpose.

Preferred Share Purchase Rights
--------------------------------------------------------------------------------

On July 24,  1986,  the  Company's  Board of  Directors  declared a dividend  of
certain  preferred  share purchase  rights on each  outstanding  share of Common
Stock. The Company will issue similar rights with respect to newly-issued shares
of Common Stock as long as the rights are attached to Common Stock.  The rights,
which are not exercisable  until certain events  involving a potential  takeover
occur, are more particularly  described in the Company's  Registration Statement
on Form 8-A,  filed with the  Commission on August 1, 1986, and Forms 8 and 8-K,
filed with the  Commission  on July 6, 1989,  which are  incorporated  herein by
reference.

Use of Proceeds
--------------------------------------------------------------------------------

The Company does not know the number of shares that will ultimately be purchased
from the  Company  under the Plan nor the  prices at which such  shares  will be
sold. The proceeds are intended to be used for general corporate  purposes or to
purchase shares in the open market for participants.


<PAGE>




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TABLE OF CONTENTS
-------------------------------------

                                              Page
   Available Information...........               2
   Incorporation by Reference......               2
   The Company.....................               2
   Nalco Chemical Company Dividend
   Reinvestment and Stock Purchase Plan           3
   Description of Capital Stock....              14
   Preferred Share Purchase Rights.              14
   Use of Proceeds.................              14

  No  person  has  been  authorized  to give  any  information  or to  make  any
representation  not  contained  in this  Prospectus,  and if given or made  such
information or representation  must not be relied upon as having been authorized
by the Company.  The delivery of this Prospectus at any time does not imply that
information herein is correct at any time subsequent to its date.



Nalco Chemical Company
---------------------------------------

DIVIDEND REINVESTMENT
AND STOCK PURCHASE PLAN


PROSPECTUS
---------------------------------------

May 20, 1996

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