[EXECUTION COPY]

                        RECAPITALIZATION AGREEMENT

             This RECAPITALIZATION AGREEMENT (this "Agreement") is made
   as of April 14, 1999, by and among Dade Behring Holdings, Inc., a
   Delaware corporation ("Holdings"), Hoechst AG, a German corporation
   ("Hoechst"), each of the Persons listed on Schedule I attached hereto
   (the "GS Group") and each of the Persons listed on Schedule II
   attached hereto (the "Bain Group," and, together with the GS Group,
   the "Investors") (Hoechst, the GS Group, the Bain Group and each
   other party from time to time a party thereto are collectively
   referred to herein as the "Stockholders" and individually as a
   "Stockholder").

             WHEREAS, Holdings, as of the date hereof, Hoechst, the GS
   Group, the Bain Group and certain members of Holdings' management own
   the number of shares of Holdings' Class L Common Stock, par value
   $.01 per share (the "Class L Common"), the number of shares of
   Holdings' Class L Common, Series B, par value $.01 per share (the
   "Class L Common, Series B"), and the number of shares of Holdings'
   Common Stock, par value $.01 per share (the "Common"), as set forth
   opposite its name on the Pre-Recap Capitalization Schedule attached
   hereto.  The Class L Common, Class L Common, Series B, and the Common
   are collectively referred to herein as "Common Stock."

             WHEREAS, Holdings desires to reconstitute its capital
   structure through the redemption of a certain number of shares of its
   Common Stock and the incurrence of new debt obligations, all on the
   terms and subject to the conditions set forth herein.

             WHEREAS, on the date hereof, Hoechst, the Investors and
   Holdings have entered into that certain Amended and Restated
   Stockholders Agreement (the "Stockholders Agreement").  Capitalized
   terms not otherwise defined herein shall have the meanings ascribed
   to such terms in the Stockholders Agreement.

             WHEREAS, the Investors desire to have certain of their
   Common Stock redeemed on the terms and subject to the conditions set
   forth herein.

             NOW, THEREFORE, in consideration of the premises and of the
   mutual representations, warranties, and covenants which are to be
   made and performed by the respective parties, it is hereby agreed as
   follows:

                                ARTICLE 1.

                         THE RECAPITALIZATION

             1.1. Recapitalization Overview.  Holdings and the
   Stockholders hereby agree that (i) Holdings shall redeem a portion of
   the Common Stock held by the Investors (as set forth below), (ii)
   Holdings shall redeem a portion of the Common Stock held or the
   Common Stock obtainable upon exercise of options held by members of
   management of Holdings and its subsidiaries or enter into other
   arrangements with respect thereto (as set forth below) and (iii)
   Holdings shall fund the repurchases of Common Stock through
   replacement credit facilities (as set forth below).

             1.2. Financing Arrangements.  The Stockholders and Holdings
   hereby agree that Holdings shall arrange for the financing or
   refinancing necessary for the transactions contemplated hereby.
   Holdings shall take such actions as are reasonably necessary to
   obtain the credit facilities and consummate the transactions
   contemplated hereby (including, the payment of commitment fees,
   financing fees and other fees and expenses).  The terms of the
   financing shall be subject to approval by the Board.

             1.3. Recapitalization Transactions.  On a Closing Date, the
   following transactions shall occur:

             (a)  Holdings shall redeem from the Investors the number of
   shares of Class L Common and Common that may be redeemed taking into
   account (x) the amount of available funds under the replacement
   credit facilities and (y) the payments to be made to members of
   management, as set forth in Section 1.3(b) below (it being understood
   that the aggregate number of shares to be redeemed shall be as
   determined by the Investors in their sole discretion, subject to an
   aggregate amount being redeemed hereunder from the Investors equal to
   the Maximum Amount (as defined on Schedule III attached hereto, i.e.,
   $450 million).  The number of shares of Class L Common and Common to
   be repurchased shall be in the ratio of 1:9.  The per share
   redemption price for each share of Class L Common shall be the Per
   Share Price (as defined on Schedule III attached hereto) plus the
   Unpaid Yield and Unreturned Original Cost on such share (as
   determined as of a Closing Date pursuant to Holdings' Amended and
   Restated Certificate of Incorporation, as in effect on the date
   hereof (the "Certificate of Incorporation")).  The per share
   redemption price for each share of Common shall be the Per Share
   Price (as defined on Schedule III attached hereto).  The redemption
   shall be made pro rata among all Investors and the redemption price
   shall be paid at Closing to the Investors in cash by wire transfer of
   immediately available funds.

             (b)  Holdings shall redeem from members of management of
   Holdings and its subsidiaries shares of Class L Common and Common,
   with the Persons to participate, and the extent of such Persons'
   participation, to be determined by the Board.  Consistent with any
   rights that the members of management may have, the Board shall
   determine the manner and extent of participation by members of
   management holding options to acquire Common.  In its discretion, the
   Board may substitute bonus payments (or other arrangements).  For the
   purposes of this Agreement, "Person" means an individual, a
   partnership, a corporation, an association, a joint stock company, a
   trust, a joint venture, an unincorporated organization, or a
   governmental entity (or any department, agency, or political
   subdivision thereof).

             1.4. Closing Transactions.

             (a)  As and when Holdings obtains financing arrangements
   pursuant to Section 1.2 hereof and the Investors approve the number
   of their shares which are to be redeemed, then there shall be a
   closing of the transactions contemplated hereby (a "Closing").  Any
   date on which a Closing shall occur is referred to herein as a
   "Closing Date," and a Closing shall be effective as of the opening of
   business on a Closing Date.

             (b)  Promptly following a Closing Date, Holdings and the
   Investors shall take all actions necessary so that upon the Investors
   surrendering their Common and Class L Common stock certificates to
   Holdings in exchange for cash by wire transfer of immediately
   available funds to the accounts previously designated by each
   Investor, Holdings shall issue and deliver to each Investor new
   Common and Class L Common stock certificates representing the number
   of Common and Class L Common shares not redeemed.

             1.5. Continuation of Voting Rights.  As a result of the
   recapitalization transactions contemplated by this Agreement, the
   relative voting power of the Investors would be reduced.  Holdings
   and the Stockholders have agreed that until such time as the shares
   of Common Stock held by the Bain Holders no longer constitute at
   least 5% of the outstanding Common Stock, the Investors shall be
   entitled to maintain the same relative voting power that they possess
   on the date of this Agreement.  Holdings and the Stockholders agree
   to take all necessary or desirable actions within such holder's
   control (whether in such holder's capacity as a stockholder, director
   or officer of Holdings or otherwise) as requested by the Investors so
   that in connection with a Closing the Investors shall retain (until
   such time as the shares of Common Stock held by the Bain Holders no
   longer constitute at least 5% of the outstanding Common Stock) voting
   rights equivalent to the voting rights represented by the shares of
   Common Stock being redeemed hereunder.  Such actions may include,
   without limitation, (x) issuing voting proxies in favor of the
   Investors, (y) permitting the Investors to exchange shares of Common
   Stock for replacement shares of capital stock with additional voting
   rights (but with no greater economic participation rights), and (z)
   amending the Transaction Documents in such a manner as may be
   required to ensure that any replacement shares are afforded
   consistent treatment thereunder.

             1.6. Investment Banking Fees.  Holdings and the
   Stockholders acknowledge and agree that in consideration of the
   investment banking services provided by Bain Capital, Inc. and
   Goldman Sachs & Co. in connection with the transaction process which
   has culminated in the parties entering into this Agreement, Holdings
   shall pay each of Bain Capital, Inc. and Goldman Sachs & Co. an
   investment banking fee.  The aggregate amount of the investment
   banking fees shall be the IB Fee Amount (as defined on Schedule III
   attached hereto), 50% of which shall be payable on the date of this
   Agreement and 50% of which shall be payable upon the first date that
   may be deemed a Closing Date.


                                ARTICLE 2.

          REPRESENTATIONS AND WARRANTIES OF THE STOCKHOLDERS

             As a material inducement to the parties hereto to enter
   into this Agreement, each Stockholder hereby represents and warrants
   that:

             2.1. Organizational Power.  Such Stockholder is a
   corporation or limited partnership duly organized, validly existing,
   and in good standing under the laws of its state of organization.
   Such Stockholder has full power and authority to enter into this
   Agreement and the other agreements contemplated hereby to which such
   Stockholder is a party and perform its obligations hereunder and
   thereunder.

             2.2. Authorization of Transaction.  The execution,
   delivery, and performance of this Agreement and the other agreements
   contemplated hereby to which such Stockholder is a party have been
   duly and validly authorized by all requisite action on the part of
   such Stockholder, and no other proceedings on its part is necessary
   to authorize the execution, delivery, or performance of this
   Agreement.  This Agreement constitutes, and each of the other
   agreements contemplated hereby to such Stockholder is a party shall
   when executed constitute, a valid and binding obligation of such
   Stockholder, enforceable in accordance with their terms.


                                ARTICLE 3.
              REPRESENTATIONS AND WARRANTIES OF HOLDINGS

             As a material inducement to the Stockholders to enter into
   this Agreement, Holdings hereby represents and warrants that:

             3.1. Organizational Power.  Holdings has been duly
   organized and is validly existing under the laws of Delaware and has
   full power and authority to execute and deliver, and to perform its
   obligations under, this Agreement and the consummation by it of the
   transactions contemplated hereby has been duly authorized by all
   necessary action on its part.

             3.2. Authorization of Transaction. This Agreement has been
   duly and validly executed and delivered by Holdings and constitutes
   the valid and binding obligation of Holdings, enforceable against
   Holdings in accordance with its terms.

             3.3. Noncontravention.  The execution, delivery and
   performance of this Agreement and the consummation thereby of the
   transactions contemplated hereby by Holdings will not with or without
   the giving of notice or the lapse of time or both (a) violate any
   provision of a material law, statute, rule or regulation to which
   Holdings is subject, (b) violate any order, judgment or decree
   applicable to it or (c) conflict with or result in a breach or
   default under any term or condition of its applicable governing
   instruments or any material agreement or other material instrument to
   which it is a party or by which it is bound.

             3.4. Capitalization.  The capitalization of Holdings prior
   to giving effect to the transactions contemplated by Article 1 above
   (including a list of all authorized, issued and outstanding shares of
   Common Stock, and the identity of the holders thereof) is set forth
   on the Pre-Recap Capitalization Schedule attached hereto.  All of the
   issued and outstanding shares of Common Stock have been duly
   authorized, are validly issued, fully paid, and nonassessable.
   Except as set forth on the Pre-Recap Capitalization Schedule and
   pursuant to this Agreement, there are no outstanding or authorized
   options, warrants, purchase rights, subscription rights, conversion
   rights, exchange rights, or other contracts or commitments that could
   require Holdings to issue, sell, or otherwise cause to become
   outstanding any of its capital stock.


                               ARTICLE 4.

                           OTHER AGREEMENTS

             4.1. Press Release and Announcements.  Unless required by
   law (in which case each party agrees to use reasonable efforts to
   consult with the other parties prior to any such disclosure as to the
   form and content of such disclosure), no press releases,
   announcements to the employees, customers or suppliers of Holdings or
   other releases of information related to this Agreement or the
   transactions contemplated hereby will be issued or released without
   the consent of the holders of at least a majority of the Common Stock
   retained by the Investors and the holders of at least a majority of
   the Common Stock held by Hoechst hereunder.

             4.2. Specific Performance.  Each party acknowledges and
   agrees that the other parties would be damaged irreparably in the
   event any of the provisions of this Agreement are not performed in
   accordance with their specific terms or are otherwise breached.
   Accordingly, each party agrees that the other parties shall be
   entitled to an injunction or injunctions to prevent breaches of the
   provisions of this Agreement and to enforce specifically this
   Agreement and the terms and provisions hereof in any action
   instituted in any court in the United States of America or in any
   state having jurisdiction over the parties and the matter in addition
   to any other remedy to which they may be entitled pursuant hereto.


                               ARTICLE 5.

                             MISCELLANEOUS

             5.1. Cooperation.  In case at any time prior to or after a
   Closing any further action is reasonably necessary or desirable to
   carry out the purposes of this Agreement, each of the parties hereto
   will take such further reasonable action (including the execution and
   delivery of such further instruments and documents) as any other
   party may request.

             5.2. Remedies.  Each Stockholder shall have all rights and
   remedies set forth in this Agreement and all rights and remedies
   which such holders have been granted at any time under any other
   agreement or contract and all of the rights which such holders have
   under any law.  Any Person having any rights under any provision of
   this Agreement shall be entitled to enforce such rights specifically
   (without posting a bond or other security), to recover damages by
   reason of any breach of any provision of this Agreement and to
   exercise all other rights granted by law.

             5.3. Consent to Amendments.  Except as otherwise expressly
   provided herein, the provisions of this Agreement may be amended and
   Holdings may take any action herein prohibited, or omit to perform
   any act herein required to be performed by it, only if Holdings has
   obtained the written consent of the holders of at least a majority of
   the Common Stock retained by the Investors hereunder and the holders
   of at least a majority of the Common Stock held by the Hoechst
   hereunder.

             5.4. Successors and Assigns.  Except as otherwise expressly
   provided herein, all covenants and agreements contained in this
   Agreement by or on behalf of any of the parties hereto shall bind and
   inure to the benefit of the respective successors and assigns of the
   parties hereto whether so expressed or not.

             5.5. Severability.  Whenever possible, each provision of
   this Agreement shall be interpreted in such manner as to be effective
   and valid under applicable law, but if any provision of this
   Agreement is held to be prohibited by or invalid under applicable
   law, such provision shall be ineffective only to the extent of such
   prohibition or invalidity, without invalidating the remainder of this
   Agreement.

             5.6. Counterparts.  This Agreement may be executed
   simultaneously in counterparts (including by means of telecopied
   signature pages), any one of which need not contain the signatures of
   more than one party, but all such counterparts taken together shall
   constitute one and the same Agreement.

             5.7. Descriptive Headings; Interpretation.  The descriptive
   headings of this Agreement are inserted for convenience only and do
   not constitute a substantive part of this Agreement.  The use of the
   word "including" in this Agreement shall be by way of example rather
   than by limitation.

             5.8. Governing Law.  All issues and questions concerning
   the construction, validity, enforcement and interpretation of this
   Agreement and the exhibits and schedules hereto shall be governed by,
   and construed in accordance with, the laws of the State of New York,
   without giving effect to any choice of law or conflict of law rules
   or provisions (whether of the State of New York or any other
   jurisdiction) that would cause the application of the laws of any
   jurisdiction other than the State of New York.

             5.9. Notices.  All notices, demands or other communications
   to be given or delivered under or by reason of the provisions of this
   Agreement shall be in writing and shall be deemed to have been given
   when delivered personally to the recipient two days after being sent
   to the recipient by reputable overnight courier service (charges
   prepaid) to the addresses indicated below or to such other address or
   to the attention of such other person as the recipient party has
   specified by prior written notice to the sending party:

             If to Holdings:

                  Dade Behring Holdings, Inc.
                  1717 Deerfield Road
                  P.O. Box 778
                  Deerfield, Illinois 60015-0778
                  Attention:  Chief Executive Officer

             If to the Bain Group:

                  Bain Capital, Inc.
                  Two Copley Place
                  Boston, Massachusetts  02116
                  U.S.A.
                  Attention:  John Connaughton

             With a copy to (which shall not constitute notice
   hereunder):

                  Kirkland & Ellis
                  200 East Randolph Drive
                  Chicago, Illinois  60601
                  U.S.A.
                  Attention: Matthew E. Steinmetz

             If to the GS Group:

                  Goldman, Sachs & Co.
                  85 Broad Street
                  New York, New York 10004
                  U.S.A.
                  Attn:  Joseph H. Gleberman

             With a copy to (which shall not constitute notice
   hereunder):

                  Fried, Frank, Harris, Shriver & Jacobson
                  One New York Plaza
                  New York, New York 10014
                  U.S.A.
                  Attention:  Lee Parks

             If to Hoechst:

             Hoechst AG
             Bruningstrasse 50
             D-65929 Frankfurt a. M.
             Germany
             Attention:  Chairman of the Management Board

             With a copy to (which shall not constitute notice
   hereunder):
             Shearman & Sterling
             599 Lexington Avenue
             New York, New York  10022
             U.S.A.
             Attention:  Creighton O'M. Condon

             5.10. No Strict Construction.  The parties hereto have
   participated jointly in the negotiation and drafting of this
   Agreement.  In the event an ambiguity or question of intent or
   interpretation arises, this Agreement shall be construed as if
   drafted jointly by the parties hereto, and no presumption or burden
   of proof shall arise favoring or disfavoring any party by virtue of
   the authorship of any of the provisions of this Agreement.

                       *     *     *     *     *

             IN WITNESS WHEREOF, the parties have executed this
   Recapitalization Agreement as of the date first written above.

                                 DADE BEHRING HOLDINGS, INC.


                                 By: /s/
                                 Its: CEO and President


                                 HOECHST AG


                                 By: /s/ Horst Waesche

                                 By: /s/

                                 Its: Board Members


                                 BAIN CAPITAL FUND IV, L.P.

                                 By:  Bain Capital Partners IV, L.P.
                                 Its: General Partner

                                 By:  Bain Capital Investors, Inc.
                                 Its: General Partner

                                 By:   /s/
                                      A Managing Director


                                 BAIN CAPITAL FUND IV-B, L.P.

                                 By:  Bain Capital Partners IV, L.P.
                                 Its: General Partner

                                 By:  Bain Capital Investors, Inc.
                                 Its: General Partner

                                 By:   /s/
                                      A Managing Director


                                 BCIP ASSOCIATES


                                 By:  /s/
                                      A General Partner


                                 BCIP TRUST ASSOCIATES, L.P.


                                 By:  /s/
                                      A General Partner


                                 GS CAPITAL PARTNERS, L.P.


                                 By:  GS Advisors, L.P.
                                 Its: General Partner

                                 By:  GS Advisors, Inc.
                                 Its: General Partner

                                 By:  /s/


                                 BRIDGE STREET FUND 1994, L.P.


                                 By:  Stone Street Funding Corp.
                                 Its: Managing General Partner

                                 By:  /s/


                                 STONE STREET FUND 1994, L.P.


                                 By:  Stone Street Funding Corp.
                                 Its: General Partner

                                 By:  /s/


                                 RANDOLPH STREET PARTNERS


                                 By: /s/
                                      A General Partner