SYBRON CHEMICALS INC
SECURITY AGREEMENT ASSIGNMENT AND AMENDMENT
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<H1 ALIGN=CENTER><FONT SIZE=3>ASSIGNMENT OF AND AMENDMENT TO</FONT></H1>

<H1 ALIGN=CENTER><FONT SIZE=3>THE SECURITY AGREEMENT</FONT></H1>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ASSIGNMENT AND AMENDMENT dated as of March 29, 2000 among SYBRON CHEMICALS INC., (the
"Borrower"), MELLON BANK, N.A., FLEET BANK, N.A. and the SUBSIDIARY GUARANTORS (referred to
below). </FONT></P>

<H1 ALIGN=CENTER><FONT SIZE=3>W I T N E S S E T H</FONT></H1>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, this Assignment and Amendment (the "Agreement") relates to the Security
Agreement dated as of July 31, 1998 (the "Security Agreement") among the Borrower, the
Subsidiary Guarantors party thereto and Mellon Bank, N.A. (the "Existing Administrative Agent"); </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, the
Security Agreement is in favor of the Existing Administrative Agent for the
benefit of the Lenders parties to the Credit Agreement dated as of July 31, 1998
(the <B>&#147;Existing Credit Agreement</B>&#148;) among the Borrower, the
Lenders party thereto, DLJ Capital Funding, Inc., as Syndication Agent (the
&#147;<B>Syndication Agent</B>&#148;), Morgan Guaranty Trust Company of New
York, as Documentation Agent, and the Existing Administrative Agent; </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, the
parties to the Existing Credit Agreement wish to amend and restate the Existing
Credit Agreement as provided in the Amended and Restated Credit Agreement dated
as of March 29, 2000 (the &#147;<B>Amended and Restated Credit
Agreement</B>&#148;) among the Borrower, the Lenders party arty thereto, the
Syndication Agent and Fleet Bank, N.A., as Administrative Agent (the
&#147;<B>New Administrative ive Agent</B>&#148;); </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS,
concurrently with the execution of this Agreement, the Existing Credit Agreement
will be amended and restated pursuant to the Amended and Restated Credit
Agreement; </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, prior
to the effectiveness of the Amended and Restated Credit Agreement, the Lenders
parties to the Existing Credit Agreement will assign, pursuant to the Master
Assignment and Assumption Agreement, to the Lenders parties to the Amended and
Restated Credit Agreement all of their Loans, Revolving Commitments and the
corresponding rights and obligations under the Existing Credit Agreement and the
other Loan Documents; </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, in
connection with Amended and Restated Credit Agreement, the Existing
Administrative Agent is resigning as Administrative Agent under the Existing
Credit Agreement and is being replaced by the New Administrative Agent, as
successor Administrative Agent under the Amended and Restated Credit Agreement
and, in connection therewith the Existing Administrative Agent wishes to assign
all of its rights and obligations under the Security Agreement to the New
Administrative Agent, the New Administrative Agent wishes to assume such rights
and obligations and the Obligors wish to consent to the assignment and
assumption. </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, the parties desire to make certain amendments to the Security Agreement; </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NOW, THEREFORE,
in consideration of the foregoing and the mutual agreements contained herein,
the parties hereto agree as follows: </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 1.  <I>Definitions.</I>  All capitalized terms not otherwise defined herein shall
have the respective meanings set forth in the Existing Credit Agreement or the Security
Agreement, as applicable. </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 2.
<I>Assignment</I>. (a) The Existing Administrative Agent hereby assigns and
transfers to the New Administrative Agent, without recourse or representation,
all of the rights and obligations of the Existing Administrative Agent under the
Security Agreement, all Liens, security interests and rights and obligations
with respect thereto and the New Administrative Agent hereby accepts such
assignment and assumes all of the rights and obligations of the Existing
Administrative Agent. Upon the effectiveness of this Agreement, which shall be
conditioned upon satisfaction of the terms and conditions of the Master
Assignment and Assumption Agreement, (i) the New Administrative Agent shall, as
of the date hereof, succeed to the rights and obligations of the Existing
Administrative Agent under the Security Agreement, (ii) the Existing
Administrative Agent shall be released from its obligations under the Security
Agreement and (iii) the Existing Administrative Agent shall be released from all
claims, liabilities, damages and losses with respect to all actions, decisions
and conduct prior to the date hereof in its capacity as Existing Administrative
Agent. </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The Existing
Administrative Agent shall deliver to the New Administrative Agent on the date
hereof, at the sole expense of the Obligors, all promissory notes, stock
certificates and other instruments included in the Collateral and previously
delivered to Existing Administrative Agent, duly executed assignments, in
appropriate form for filing in the applicable Uniform Commercial Code filing
offices, of all UCC financing statements filed in connection with the Security
Agreement, duly executed assignments, in appropriate form for filing in the
United States Patent and Trademark Office or the United States Copyright Office,
of all Intellectual Property Filings filed in connection with the Security
Agreement, duly executed assignments of all Mortgages in appropriate form for
filing in the applicable recording offices and all other documents previously
delivered to the Existing Administrative Agent or its counsel pursuant to the
Security Agreement. The Existing Administrative Agent agrees to execute and
deliver, at the sole expense of the Obligors, to the New Administrative Agent
such additional documents as may be necessary or as the New Administrative Agent
may reasonably request to effectuate the assignment contemplated in subsection
(a) or to perfect or continue the perfection of the Liens created under the
Collateral Documents. </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 3.
<I>Non-reliance on Existing Administrative Agent</I>. The Existing
Administrative Agent makes no representation or warranty in connection with, and
shall have no responsibility with respect to, the solvency, financial condition,
or statements of the Obligors, or the validity and enforceability of the
obligations of, or the Liens and security interests granted by, the Obligors in
respect of the Existing Credit Agreement, any Note, the Collateral Documents or
the Subsidiary Guarantee Agreement. The New Administrative Agent acknowledges
that it has, independently and without reliance on the Existing Administrative
Agent, assumed the rights and obligations of the Administrative Agent under the
Security Agreement. The assignment made hereunder is made without recourse or
liability to the Existing Administrative Agent. </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 4.  <I>Amendments to Security Agreement.</I>  The following amendments shall be made
to the Security Agreement: </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)      The reference in Section 5(j) of the Security Agreement to &#147;Section 2.13&#148; of the
                  Credit Agreement is hereby changed to &#147;Section 2.04(d)(i).&#148; </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)      The reference in Section 5(q) of the Security Agreement to &#147;Section 2.04(c)(i)&#148; of the
                  Credit Agreement is hereby changed to &#147;Section 2.04(d)(i)&#148;. </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 5.  <I>Governing Law.</I>  This Agreement shall be governed by and construed in
accordance with the laws of the State of New York. </FONT></P>

<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 6.
<I>Counterparts; Effectiveness</I>. This Agreement may be signed in any number
of counterparts, each of which shall be an original, with the same effect as if
the signatures thereto and hereto were upon the same instrument. This Agreement
shall become effective when: </FONT></P>

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<TD WIDTH=95%><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i)
the Syndication Agent shall have received from each of the parties hereto a
counterpart hereof signed by such party or facsimile or other written
confirmation (in form satisfactory to the Syndication Agent) that such party has
signed a counterpart hereof; </FONT>
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<TD WIDTH=95%><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii)
the New Administrative Agent shall have received the promissory notes, stock
certificates and other instruments (other than the financing statement,
Intellectual Property Filing and Mortgage assignments referred to therein)
referred to in the first sentence of Section 2(b) hereof; </FONT>
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<TD WIDTH=95%><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii)
the Master Assignment and Assumption Agreement shall have become effective in
accordance with its terms and the assignments and transfers contemplated therein
shall have been completed; and </FONT>
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<TD WIDTH=95%><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv)
the Amended and Restated Credit Agreement shall have become effective in accordance
with its terms. </FONT>
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<P><FONT SIZE=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN WITNESS
WHEREOF, the parties have caused this Agreement to be executed and delivered by
their duly authorized officer as of the date first above written. </FONT></P>

<PRE>
                                            SYBRON CHEMICALS INC.


                                            By:  _______________________________
                                                  Title:


                                            SYBRON CHEMICALS HOLDINGS INC.


                                            By:  _______________________________
                                                  Title:


                                             RUCO POLYMER CORPORATION


                                            By  _______________________________
                                                  Title:


                                            RUCO POLYMER COMPANY OF
                                                  GEORGIA, LLC


                                            By:  ______________________________
                                                  Title:


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                                            MELLON BANK, N.A., as Existing
                                            Administrative Agent


                                            By:  ______________________________
                                                  Title:


                                            FLEET BANK, N.A., as New
                                            Administrative Agent


                                            By:  ______________________________
                                                  Title:
</PRE>

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