VWR SCIENTIFIC PRODUCTS CORP
SC 14D1/A, 1999-07-02
PROFESSIONAL & COMMERCIAL EQUIPMENT & SUPPLIES
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<PAGE>   1



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                  -------------

                                 SCHEDULE 14D-1
                                (AMENDMENT NO. 1)
               TENDER OFFER STATEMENT PURSUANT TO SECTION 14(d)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                       VWR SCIENTIFIC PRODUCTS CORPORATION
                            (Name of Subject Company)

                               EM SUBSIDIARY, INC.
                          EM LABORATORIES, INCORPORATED
                         MERCK KGAA, DARMSTADT, GERMANY
                                    (Bidders)

                     COMMON STOCK, PAR VALUE $1.00 PER SHARE
                         (Title of Class of Securities)

                                    918435108
                      (Cusip Number of Class of Securities)

                                STEPHEN J. KUNST
                          VICE PRESIDENT AND SECRETARY
                               EM SUBSIDIARY, INC.
                       C/O EM LABORATORIES, INCORPORATED.
                                 7 SKYLINE DRIVE
                            HAWTHORNE, NEW YORK 10532
                                 (914) 592-4660
            (Name, Address and Telephone Number of Person Authorized
           to Receive Notices and Communications on Behalf of Bidders)

                                    COPY TO:
                              KLAUS H. JANDER, ESQ.
                           RICHARD T. MCDERMOTT, ESQ.
                               ROGERS & WELLS LLP
                                 200 PARK AVENUE
                            NEW YORK, NEW YORK 10166
                                 (212) 878-8000

                                  July 2, 1999

                         (Continued on following pages)

                              (Page 1 of 11 pages)
<PAGE>   2
- -----------------------                                   ---------------------
   CUSIP No. 918435108                14D-1                       Page 2
- -----------------------                                   ---------------------
===============================================================================
    1.     Name of Reporting Persons
           S.S. or I.R.S. Identification Nos. of Above Persons

                                   EM SUBSIDIARY, INC.
===============================================================================
    2.     Check the Appropriate Box if a Member of a Group
              (a) [ ]
              (b) [X]
===============================================================================
    3.     SEC Use Only
===============================================================================
    4.     Sources of Funds

                                AF
===============================================================================
    5.  Check if Disclosure of Legal Proceedings is Required Pursuant to Items
        2(e) or 2(f)

              [ ]
===============================================================================
    6.     Citizenship or Place of Organization

                                  PENNSYLVANIA
===============================================================================
    7.     Aggregate Amount Beneficially Owned by Each Reporting Person

                                15,538,784
===============================================================================
    8.     Check if the Aggregate Amount in Row 7 Excludes Certain Shares

              [ ]
===============================================================================
    9.     Percent of Class Represented by Amount in Row 7

                                49.9%
===============================================================================
   10.     Type of Reporting Person

                                CO
===============================================================================
<PAGE>   3
- -----------------------                                   ---------------------
   CUSIP No. 918435108                14D-1                       Page 3
- -----------------------                                   ---------------------
===============================================================================
    1.     Name of Reporting Persons
           S.S. or I.R.S. Identification Nos. of Above Persons

                              EM LABORATORIES, INCORPORATED
===============================================================================
    2.     Check the Appropriate Box if a Member of a Group
              (a) [ ]
              (b) [X]
===============================================================================
    3.     SEC Use Only
===============================================================================
    4.     Sources of Funds

                                AF
===============================================================================
    5.  Check if Disclosure of Legal Proceedings is Required Pursuant to Items
        2(e) or 2(f)

              [ ]
===============================================================================
    6.     Citizenship or Place of Organization

                                NEW YORK
===============================================================================
    7.     Aggregate Amount Beneficially Owned by Each Reporting Person

                                15,538,784
===============================================================================
    8.     Check if the Aggregate Amount in Row 7 Excludes Certain Shares

              [ ]
===============================================================================
    9.     Percent of Class Represented by Amount in Row 7

                                49.9%
===============================================================================
   10.     Type of Reporting Person

                                CO
===============================================================================
<PAGE>   4
- -----------------------                                   ---------------------
   CUSIP No. 918435108                14D-1                       Page 4
- -----------------------                                   ---------------------
===============================================================================
    1.     Name of Reporting Persons
           S.S. or I.R.S. Identification Nos. of Above Persons

                             MERCK KGaA, DARMSTADT, GERMANY
===============================================================================
    2.     Check the Appropriate Box if a Member of a Group
              (a) [ ]
              (b) [X]
===============================================================================
    3.     SEC Use Only
===============================================================================
    4.     Sources of Funds

                                WC
===============================================================================
    5.  Check if Disclosure of Legal Proceedings is Required Pursuant to Items
        2(e) or 2(f)

              [ ]
===============================================================================
    6.     Citizenship or Place of Organization

                                GERMANY
===============================================================================
    7.     Aggregate Amount Beneficially Owned by Each Reporting Person

                                15,538,784
===============================================================================
    8.     Check if the Aggregate Amount in Row 7 Excludes Certain Shares

              [ ]
===============================================================================
    9.     Percent of Class Represented by Amount in Row 7

                                49.9%
===============================================================================
           Type of Reporting Person

                                CO
===============================================================================
<PAGE>   5
   This Amendment No. 1 to the Rule 14d-1 Tender Offer Statement on Schedule
14D-1 (this "Amendment") is being filed by (i) Merck KGaA, Darmstadt, Germany, a
German company ("Merck KGaA"), (ii) EM Laboratories, Incorporated, a New York
corporation ("Parent") and an indirect subsidiary of Merck KGaA and (iii) EM
Subsidiary, Inc., a Pennsylvania corporation ("Purchaser") and a wholly-owned
subsidiary of Parent, pursuant to Section 14(d) of the Securities Exchange Act
of 1934, as amended, and Rule 14d-1 thereunder in connection with the tender
offer by Purchaser, Parent and Merck KGaA to purchase all outstanding shares of
common stock, par value $1.00 per share of VWR Scientific Products Corporation,
a Pennsylvania corporation (the "Company"), at $37.00 per Share, net to the
seller in cash without interest thereon, upon the terms and subject to the
conditions set forth in the Offer to Purchase, dated June 14, 1999, of
Purchaser, Parent and Merck KGaA (the "Offer to Purchase") and in the related
Letter of Transmittal (which, together with any supplements or amendments
thereto, collectively constitute the "Offer").

   ITEM 10  ADDITIONAL INFORMATION.

(a) Item 10(f) is hereby amended by amending and restating the first four
paragraphs under "6. Fairness of the Transaction" in the Offer to Purchase as
follows:

            Merck KGaA, Parent and Purchaser understand as follows concerning
      the determination by the Board of the Company of the fairness of the Offer
      and the Merger. The Company's Board, by unanimous vote of the Unaffiliated
      Directors acting as a quorum of the full Company Board, based upon, among
      other things, the unanimous recommendation and approval of the Special
      Committee, has determined that the Merger Agreement and the transactions
      contemplated thereby, including each of the Offer and the Merger
      (collectively, the "Transactions"), are fair to, and in the best interests
      of, the Company and the shareholders of the Company not affiliated with
      Merck KGaA (the "Public Shareholders"), approved the Merger Agreement, the
      Offer and the Merger, and resolved to recommend that shareholders accept
      the Offer and tender their Shares pursuant to the Offer and subsequently
      to approve the Merger Agreement, if such approval is required by law.

            In making the recommendation to the Company's Board and approving
      the Merger Agreement and the Transactions, the Unaffiliated Directors
      considered a number of factors, including, but not limited to, the
      following:

            (a) the financial and other terms and conditions of the Merger
      Agreement, including the proposed structure of the Offer and the Merger
      involving a cash tender offer of $37.00 per Share for all outstanding
      Shares, to be followed by a merger for the same consideration;

            (b) various risks and uncertainties associated with any expansion of
      the Company's distribution business to meet the needs of its global
      customers;

            (c) the historical market prices of the Shares, including the fact
      that the Offer price and the Merger price of $37.00 per Share represented
      premiums of approximately 29.0%, 32.1% and 32.7% over the closing prices
      per Share on the NASDAQ Stock Market June 3, 4, and 7, 1999, respectively,
      the last three full trading days prior to the June 8, 1999 announcement of
      the Transactions, and represented a premium of approximately 40% over the
      closing price for the Shares on the NASDAQ Stock Market on the date 30
      days prior to the announcement of the Transactions;

            (d) according to Bloomberg LP, the $37.00 per Share to be paid to
      the Public Shareholders in the Offer and the Merger exceeded the highest
      price at which the Shares have closed on the NASDAQ Stock Market since the
      Company became a public company in 1986;

            (e) neither the Offer nor the Merger is subject to any financing
      condition, and that Parent has represented that it has available to it
      from or through Merck KGaA or its affiliates, sufficient funds to
      consummate the Offer, the Merger and the transactions contemplated
      thereby;

            (f) the separate opinions, each dated June 8, 1999, to the Company's
      Board and Special Committee, of BT Alex. Brown Incorporated ("BT Alex.
      Brown") (now merged with Deutsche Bank Securities Inc., and known as
      Deutsche Banc Alex. Brown) and Warburg Dillon Read LLC ("Warburg
<PAGE>   6
      Dillon Read") to the effect that, as of the date of such opinions and
      based upon and subject to certain matters stated therein, the $37.00 per
      Share cash consideration to be received in the Offer and the Merger by the
      holders of Shares (other than Merck KGaA and its affiliates) was fair,
      from a financial point of view, to such holders. The full text of the
      written opinions of BT Alex. Brown and Warburg Dillon Read dated June 8,
      1999, the analyses and conclusions of which were concurred with and
      adopted by the Company's Board and Special Committee and set forth the
      assumptions made, matters considered and limitations on and review
      undertaken, are attached as Schedule II and Schedule III, respectively, to
      this Offer to Purchase and are incorporated herein by reference. The
      opinions of BT Alex. Brown and Warburg Dillon Read are directed to the
      Company's Board and Special Committee, address only the fairness of the
      $37.00 per Share cash consideration to be received in the Offer and the
      Merger by the holders of Shares (other than Merck KGaA and its affiliates)
      from a financial point of view, and do not constitute a recommendation to
      any shareholder as to whether or not such shareholder should tender Shares
      in the Offer or as to how such shareholder should vote with respect to the
      proposed Merger. Holders of Shares are urged to read such opinions
      carefully in their entirety;

            (g) the terms of the Merger Agreement were determined through
      arm's-length bargaining between the Special Committee and its legal and
      financial advisors, on one hand, and representatives of Parent, on the
      other, and provide for the Offer in order to allow Public Shareholders to
      receive payment for their Shares; and

            (h) Parent and its affiliates informed the Special Committee that
      they would not be interested in a third-party sale of the Company; the
      Special Committee and its financial advisors were not authorized to, and
      did not, solicit third-party indications of interest for the acquisition
      of the Company (which they deemed highly unlikely to receive in light to
      the aggregate ownership of the Company by Merck KGaA and its affiliates
      and their affirmative disinterest in a third party sale of the Company),
      nor were any offers from third parties received; although the Unaffiliated
      Directors recognized that this factor did not necessarily support its
      determination regarding the fairness of the Transactions, the Unaffiliated
      Directors concluded that this factor was substantially outweighed by the
      totality of the other factors it considered in arriving at its
      determination.

            The Unaffiliated Directors recognized that the Merger had not been
      structured to require the approval of a majority of the Shares held by the
      Public Shareholders and that following successful completion of the Offer,
      Merck KGaA and its affiliates would have sufficient voting power to
      approve the Merger Agreement without the affirmative vote of any other
      shareholder of the Company. However, the Unaffiliated Directors, including
      all of the members of the Special Committee, believed that the
      Transactions were procedurally fair because, among other things:

            (a) the Special Committee was appointed to represent the interests
      of the Public Shareholders;

            (b) by reason of the Standstill Agreement, completion of the Offer
      (and thus completion of the Merger) is conditioned upon its acceptance by
      the holders of a majority of the Shares not owned by Parent and its
      affiliates; such condition may not be waived by Purchaser without the
      consent of the Company and is designed to assure that the Public
      Shareholders holding a majority of the shares owned by all Public
      Shareholders have determined to accept the terms of the Offer prior to any
      vote on the Merger;

            (c) prior to consummation of the Offer, the Company's Board of
      Directors may cause the Offer to be terminated if it receives an
      unsolicited proposal to be acquired by a third-party and, in the opinion
      of the Company's outside legal counsel, failure to consider such a
      proposal would result in a breach of the fiduciary duties of the Company's
      Board of Directors under applicable law. Under such circumstances, the
      Company would be required to reimburse Parent for its reasonable
      documented out-of-pocket expenses in an amount up to $8 million;
<PAGE>   7
            (d) the Special Committee retained BT Alex. Brown and Warburg Dillon
      Read as its independent financial advisors to assist it in evaluating and
      negotiating a potential transaction with the Parent and its affiliates;

            (e) the Special Committee engaged in deliberations to evaluate the
      Transactions and alternatives thereto;

            (f) the $37.00 per Share price and the other terms and conditions of
      the Transaction resulted from active arm's-length bargaining between
      representatives of the Special Committee, on the one hand, and
      representatives of Parent and its affiliate, on the other; and

            (g) Public Shareholders may obtain "fair value" for their Shares if
      they exercise and perfect their appraisal rights under the PBCL.

      The approval and recommendation of the Company's Board of Directors was
based on the totality of the information considered by it. The Company's Board
of Directors did not assign relative weights to the factors considered by it or
determine that any one factor was of primary importance.

(b) Item 10(f) is hereby amended by amending and restating the paragraph under
"6. Fairness of the Transaction - Position of Merck KGaA, Parent and Purchaser
regarding Fairness of the Offer and Merger" in the Offer to Purchase as follows:

            MerckKGaA, Parent and Purchaser believe that the consideration to be
      received by the Public Shareholders, pursuant to the Offer and the Merger,
      is fair to the Public Shareholders. Merck KGaA, Parent and Purchaser based
      their belief on a number of factors, including, but not limited to:

            (a) the fact that the Unaffiliated Directors and the Special
      Committee unanimously concluded that the Offer and the Merger are fair to,
      and in the best interests of, the Company and the Public Shareholders;

            (b) the financial and other terms and conditions of the Merger
      Agreement, including the proposed structure of the Offer and the Merger
      involving a cash tender offer of $37.00 per Share for all outstanding
      Shares, to be followed by a merger for the same consideration;

            (c) various risks and uncertainties associated with any expansion of
      the Company's distribution business to meet the needs of its global
      customers;

            (d) the historical market prices of the Shares, including the fact
      that the Offer price and the Merger price of $37.00 per Share represented
      premiums of approximately 29.0%, 32.1% and 32.7% over the closing prices
      per Share on the NASDAQ Stock Market June 3, 4, and 7, 1999, respectively,
      the last three full trading days prior to the June 8, 1999 announcement of
      the Transactions, and represented a premium of approximately 40% over the
      closing price for the Shares on the NASDAQ Stock Market on the date 30
      days prior to the announcement of the Transactions;

            (e) according to Bloomberg LP, the $37.00 per Share to be paid to
      the Public Shareholders in the Offer and the Merger exceeded the highest
      price at which the Shares have closed on the NASDAQ Stock Market since the
      Company became a public company in 1986;

            (f) neither the Offer nor the Merger is subject to any financing
      condition, and that Parent has represented that it has available to it
      from or through Merck KGaA or its affiliates, sufficient funds to
      consummate the Offer, the Merger and the transactions contemplated
      thereby;

            (g) notwithstanding the fact that BT Alex. Brown's and Warburg
      Dillon Read's opinions were provided solely for the information and
      assistance of the Company's Board and Special Committee and that Merck
      KGaA, Parent and Purchaser are not entitled to rely on such opinions, the
      fact that the Company's Board and Special Committee received an opinion
      from each of BT Alex. Brown and Warburg Dillon Read as to the fairness,
      from a financial point of view, to the holders of Shares (other than Merck
      KGaA and its affiliates) of the $37.00 per Share cash consideration to be
      received by such holders in the Offer and the Merger. The full text of the
      written opinions of BT Alex. Brown and
<PAGE>   8
      Warburg Dillon Read dated June 8, 1999, which set forth the assumptions
      made, matters considered, and limitations on the review undertaken, are
      attached as Schedules II and III, respectively, to this Offer to Purchase,
      and are incorporated herein by reference. The opinions of BT Alex. Brown
      and Warburg Dillon Read are directed to the Company's Board and Special
      Committee, address only the fairness of the $37.00 per Share cash
      consideration to be received in the Offer and the Merger by the holders of
      Shares (other than Merck KGaA and its affiliates) from a financial point
      of view, and do not constitute a recommendation to any shareholder as to
      whether or not such shareholder should tender Shares in the Offer or as to
      how such shareholder should vote with respect to the proposed Merger.
      Holders of Shares are urged to read such opinions carefully in their
      entirety;

            (h) the terms of the Merger Agreement were determined through
      arm's-length bargaining between the Special Committee and its legal and
      financial advisors, on one hand, and representatives of Parent, on the
      other, and provide for the Offer in order to allow Public Shareholders to
      receive payment for their Shares; and

            (i) Parent and its affiliates informed the Special Committee that it
      would not be interested in a third-party sale of the Company; the Special
      Committee and its financial advisors were not authorized to, and did not,
      solicit third-party indications of interest for the acquisition of the
      Company (which they deemed highly unlikely to receive in light to the
      aggregate ownership of the Company by the Parent and its affiliates and
      their affirmative disinterest in a third party sale of the Company), nor
      were any offers from third parties received; although the Unaffiliated
      Directors recognized that this factor did not necessarily support its
      determination regarding the fairness of the Offer and the Merger, the
      Unaffiliated Directors concluded that this factor was substantially
      outweighed by the totality of the other factors it considered in arriving
      at its determination.

            Merck KGaA, Parent and Purchaser have reviewed the factors
      considered by the Unaffiliated Directors in support of their decision, as
      described in the Schedule 14D-9 and above, and had no basis to question
      their consideration of or reliance on those factors. In concluding that
      the terms of the Offer and the Merger are fair to the Public Shareholders,
      Merck KGaA, Parent and Purchaser viewed all of the factors listed above as
      supporting such conclusion. Merck KGaA, Parent and Purchaser found it
      impracticable to assign, and they did not assign, relative weights to the
      individual factors considered in reaching their conclusion as to fairness,
      but viewed the totality of the factors considered in reaching their
      conclusion. Merck KGaA, Parent and Purchaser recognize that the Merger had
      not been structured to require the approval of a majority of the Shares
      held by the Public Shareholders and that following the successful
      completion of the Offer, Parent and its affiliates would have sufficient
      voting power to approve the Merger Agreement without the affirmative vote
      of any other shareholders of the Company. Without assigning relative
      weights to the factors considered by Unaffiliated Directors, including the
      Special Committee, or determining that any one of such factors was of
      primary importance, Merck KGaA, Parent and Purchaser believe that the
      Offer and the Merger are procedurally fair for the reasons cited by the
      Unaffiliated Directors, including the Special Committee, which factors
      include, without limitation, that by reason of the Standstill Agreement,
      completion of the Offer (and thus completion of the Merger) is conditioned
      upon its acceptance by the holders of a majority of the Shares owned by
      the Public Shareholders; such condition may not be waived by Purchaser
      without the consent of the Company and is designed to assure that the
      shareholders holding a majority of the Shares owned by all Public
      Shareholders have determined to accept the terms of the Offer prior to any
      vote on the Merger. See "6. Fairness of the Transaction."

(c) Item 10(f) is hereby amended by amending and restating the third paragraph
under "6. Fairness of the Transaction - Opinion of BT Alex. Brown Incorporated;
Other Factors" in the Offer to Purchase as follows:

            The preparation of a fairness opinion is a complex analytic process
      involving various determinations as to the most appropriate and relevant
      methods of financial analyses and the application of those methods to the
      particular circumstances and, therefore, a fairness opinion is not readily
      susceptible to a summary description. BT Alex. Brown arrived at its
      ultimate opinion based on the results of all of the analyses undertaken by
      it and assessed as a whole. BT Alex. Brown did not draw conclusions from
      or with regard to any one factor or method of analysis. Rather, BT Alex.
      Brown believed that the totality of the factors considered and analyses
      performed by BT Alex. Brown in
<PAGE>   9
      connection with its opinion operated collectively to support its
      determination as to the fairness of the per Share cash consideration to be
      received in the Offer and the Merger from a financial point of view.
      Accordingly, BT Alex. Brown believes that its analyses and the summary
      above must be considered as a whole and that selecting portions of its
      analyses and factors or focusing on information presented in tabular
      format, without considering all analyses and factors or the narrative
      description of the analyses, could create a misleading or incomplete view
      of the process underlying BT Alex. Brown's analyses and opinion.

(d) Item 10(f) is hereby amended by amending and restating the sixth paragraph
under "6. Fairness of the Transaction - Opinion of BT Alex. Brown Incorporated;
Other Factors" in the Offer to Purchase as follows:

            BT Alex. Brown is an internationally recognized investment banking
      firm and, as a customary part of its investment banking business, is
      engaged in the valuation and their securities in connection with mergers
      and acquisitions, negotiated underwritings, private placements and
      valuations for estate corporate and other purposes. The Company selected
      BT Alex. Brown based on BT Alex. Brown's reputation, expertise and
      familiarity with the Company. BT Alex. Brown and its affiliates have in
      the past provided financial services to the Company and Merck KGaA
      unrelated to the Offer and Merger, for which services BT Alex. Brown and
      its affiliates have received compensation. During the past two years, BT
      Alex. Brown has received aggregate compensation of approximately $451,815
      for its financial services to the Company.

(e) Item 10 (f) is hereby amended by amending and restating the sixth paragraph
under "6. Fairness of the Transaction - Opinion of Warburg Dillon Read LLC" in
the Offer to Purchase as follows:

            Warburg Dillon Read believes that its analyses and the summary below
      must be considered as a whole and that selecting portions of its analyses
      and factors or focusing on information presented in tabular format,
      without considering all analyses and factors or the narrative description
      of the analyses, could create a misleading or incomplete view of the
      process underlying Warburg Dillon Read's analyses and opinion. None of the
      analyses performed by Warburg Dillon Read was assigned a greater
      significance by Warburg Dillon Read than any other. Warburg Dillon Read
      arrived at its ultimate opinion based on the results of all the analyses
      undertaken by it and assessed as a whole. Warburg Dillon Read did not draw
      conclusions from or with regard to any one factor or method of analysis.
      Rather, Warburg Dillon Read believes that the totality of the factors
      considered and analyses performed by Warburg Dillon Read in connection
      with its opinion operated collectively to support its determination as to
      the fairness of the per Share cash consideration to be received in the
      Offer and the Merger from a financial point of view.

(f) Item 10(f) is hereby amended by amending and restating the title of the
table concerning the 1999 Budget Balance Sheet of VWR Scientific Products under
"8. Certain Information Concerning the Company" in the Offer to Purchase as
follows:

                            VWR Scientific Products
                           1999 Budget Balance Sheet
                                 (In millions)

(g) Item 10 (f) is hereby amended by amending and restating in its entirety the
last paragraph under "8. Certain Information Concerning the Company Other
Financial Information" in the Offer to Purchase as follows:

            The foregoing information was prepared by the Company solely for
      internal use and not for publication or with a view to complying with the
      published guidelines of the Commission regarding projections or with the
      guidelines established by the American Institute of Certified Public
      Accountants and are included in this Offer to Purchase only because they
      were furnished to Merck KGaA and Parent. The foregoing information is
      "forward-looking" and inherently subject to significant uncertainties and
      contingencies, many of which are beyond the control of the Company,
      including industry performance, general business and economic conditions,
      changing competition, adverse changes in applicable laws, regulations or
      rules governing environmental, tax or accounting matters and other
      matters. It is not possible to predict whether the assumptions made in
      preparing the foregoing information will be accurate, and actual results
      may be materially higher or lower than those described above. The Company
      has advised Merck KGaA, Parent, and Purchaser that the foregoing
      information was prepared based on the following assumptions: The budgeted
      profit and loss data for the Company for 1999 assumes a sales growth of
      11.6%, which is comprised of an 8% growth in the Company's core business,
      with the remaining growth coming from a full year's effect of the
      acquisitions effected by the Company during 1998 (the "1998
      Acquisitions"). (See Note 2 of the Financial Statements of the Company,
      annexed as Schedule V hereto, which describes the 1998 Acquisitions more
      fully.) The substantial portion of the budgeted gross margin improvement
      is the projected result of a full year effect of the 1998 Acquisitions in
      the education market, which historically earns higher margins. In
      addition, to a lesser extent, the gross margin percentage improvement is
      projected from the continued focus on internal efficiency improvement in
      the Company's core business. Operating expenses as a percent of sales are
      projected to increase slightly over the prior year as a result of the full
      year's effect of the 1998 Acquisitions.

            The balance sheet assumptions are a combination of the flow through
      impact of the 1999 budgeted profit and loss statement, combined with the
      projected days sales outstanding and planned FIFO inventory days therein
      reflected. Capital expenditures are budgeted at $16.0 Million and the
      projected net change in net property during 1999 is the result of regular
      depreciation charges.

            The inclusion of this information should not be regarded as an
      indication that Parent, Purchaser, Merck KGaA, the Company or anyone who
      received this information considered it a reliable predictor or future
      events, and this information should not be relied upon as such. None of
      Parent, Purchaser or Merck KGaA assumes any responsibility for the
      validity, reasonableness, accuracy or completeness of the projections and
      the Company has made no representations to Parent, Purchaser or Merck KGaA
      regarding the financial information described above. None of the Company,
      Parent,

<PAGE>   10
      Purchaser, Merck KGaA or any other party intends publicly to update or
      otherwise publicly revise the projections even if experience or future
      changes make it clear that the projections will not be realized.

(h) The first paragraph under "14. Conditions of the Offer" in the Offer to
Purchase will be amended as follows:

            Purchaser will not be required to accept for payment or, subject to
      any applicable rules and regulations of the Commission, including Rule
      14e-1(c) under the Exchange Act (relating to Purchaser's obligation to pay
      for or return tendered Shares after termination or withdrawal of the
      Offer), pay for, and (subject to any such rules or regulations) may delay
      the acceptance for payment of any tendered Shares and (except as provided
      in the Merger Agreement) amend or terminate the Offer (whether or not any
      Shares have been previously purchased or paid for pursuant to the Offer)
      (A) unless on or before the Expiration Date the following conditions shall
      have been satisfied: (i) there shall be validly tendered and not withdrawn
      prior to the expiration of the Offer a number Shares which represents a
      majority of the total number of outstanding Shares of the Company,
      excluding any Shares held by Parent, Purchaser or any affiliate thereof
      and (ii) any applicable waiting period under the HSR Act or any similar
      applicable foreign law, including but not limited to the requirement of
      the German federal antitrust supervisory authority (Bundeskartelamt),
      shall have expired or been terminated prior to the expiration of the Offer
      and the required approval of any governmental entity for the Merger
      Agreement or the consummation of the transactions contemplated by the
      Merger Agreement shall have been obtained or (B) if at any time after the
      date of the Merger Agreement and before the Expiration Date, any of the
      following events shall occur and be continuing:

<PAGE>   11
                                    SIGNATURE


      After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated: July 2, 1999


                               EM SUBSIDIARY, INC.


                               By:         /s/ Dieter Janssen
                                      ------------------------------------------
                               Name:  Dieter Janssen
                               Title: President





                               EM LABORATORIES, INCORPORATED



                               By:         /s/ Stephen J. Kunst
                                      ------------------------------------------
                               Name:  Stephen J. Kunst
                               Title: Vice-President & Secretary





                               MERCK KGaA, DARMSTADT, GERMANY



                               By:         /s/ Klaus-Peter Brandis
                                      ------------------------------------------
                               Name:  Klaus-Peter Brandis
                               Title: Departmental Director (Abteilungsdirektor)


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