Document:

<PAGE>
                                                                    Exhibit 10.1

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                                CREDIT AGREEMENT

                                   dated as of

                                  June 27, 2001

                                      among

                                ISP CHEMCO INC.,
                       as a Borrower and the Lead Borrower

                                       and
                               ISP CHEMICALS INC.,

                            ISP TECHNOLOGIES INC. and

                               ISP MINERALS INC.,
                             as additional Borrowers

                     The SUBSIDIARY GUARANTORS Party Hereto

                            The LENDERS Party Hereto

                                       and

                            THE CHASE MANHATTAN BANK,
                             as Administrative Agent

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

                                  $450,000,000

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

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                          J.P. MORGAN SECURITIES INC.,
                    as Advisor, Lead Arranger and Bookrunner

             BEAR STEARNS CORPORATE LENDING INC. and UBS WARBURG LLC
                            as Co-Syndication Agents

           DEUTSCHE BANC ALEX. BROWN INC. and THE BANK OF NOVA SCOTIA,
                           as Co-Documentation Agents

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                                TABLE OF CONTENTS

                                                                            Page

     ARTICLE I      DEFINITIONS................................................1
     Section 1.01.  Defined Terms..............................................1
     Section 1.02.  Classification of Loans and Borrowings....................29
     Section 1.03.  Terms Generally...........................................29
     Section 1.04.  Accounting Terms; GAAP....................................29

     ARTICLE II     THE CREDITS...............................................31
     Section 2.01.  The Commitments...........................................31
     Section 2.02.  Loans and Borrowings......................................31
     Section 2.03.  Requests for Syndicated Borrowings........................32
     Section 2.04.  Swingline Loans...........................................33
     Section 2.05.  Letters of Credit.........................................34
     Section 2.06.  Funding of Borrowings.....................................39
     Section 2.07.  Interest Elections........................................39
     Section 2.08.  Termination and Reduction of the Commitments..............40
     Section 2.09.  Repayment of Loans; Evidence of Debt......................42
     Section 2.10.  Prepayment of Loans.......................................43
     Section 2.11.  Fees......................................................48
     Section 2.12.  Interest..................................................49
     Section 2.13.  Alternate Rate of Interest................................49
     Section 2.14.  Increased Costs...........................................50
     Section 2.15.  Break Funding Payments....................................51
     Section 2.16.  Taxes.....................................................52
     Section 2.17.  Payments Generally; Pro Rata Treatment;
                    Sharing of Set-offs.......................................53
     Section 2.18.  Mitigation Obligations; Replacement of Lenders............55
     Section 2.19.  Agency; Joint and Several Liability.......................56
     Section 2.20.  Requests for Special Collateral Releases..................58

     ARTICLE III    GUARANTEE.................................................58
     Section 3.01.  The Guarantee.............................................58
     Section 3.02.  Obligations Unconditional.................................59
     Section 3.03.  Reinstatement.............................................60
     Section 3.04.  Subrogation...............................................60
     Section 3.05.  Remedies..................................................60
     Section 3.06.  Instrument for the Payment of Money.......................60
     Section 3.07.  Continuing Guarantee......................................60
     Section 3.08.  Rights of Contribution....................................61
     Section 3.09.  General Limitation on Guarantee Obligations...............61
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     ARTICLE IV     REPRESENTATIONS AND WARRANTIES............................62
     Section 4.01.  Corporate Existence.......................................62
     Section 4.02.  Financial Condition.......................................62
     Section 4.03.  Litigation................................................62
     Section 4.04.  No Breach.................................................62
     Section 4.05.  Action....................................................63
     Section 4.06.  Approvals.................................................63
     Section 4.07.  Use of Credit.............................................63
     Section 4.08.  ERISA.....................................................63
     Section 4.09.  Taxes.....................................................64
     Section 4.10.  Investment Company Act....................................64
     Section 4.11.  Public Utility Holding Company Act........................64
     Section 4.12.  Indebtedness and Liens....................................64
     Section 4.13.  Hazardous Materials.......................................65
     Section 4.14.  Subsidiaries, Etc.........................................66
     Section 4.15.  Disclosure................................................67
     Section 4.16.  Patents, Trademarks, Etc..................................67
     Section 4.17.  Real Property.............................................67
     Section 4.18.  Compliance with Laws and Agreements.......................68
     Section 4.19.  Restrictions on Subsidiaries..............................68
     Section 4.20.  Investments...............................................68
     Section 4.21.  Collateral Security.......................................68

     ARTICLE V      CONDITIONS................................................68
     Section 5.01.  Effective Date............................................68
     Section 5.02.  Each Credit Event.........................................72
     Section 5.03.  Each Special Collateral Release...........................73

     ARTICLE VI     COVENANTS.................................................73
     Section 6.01.  Information...............................................74
     Section 6.02.  Litigation, Etc...........................................76
     Section 6.03.  Corporate Existence, Etc..................................76
     Section 6.04.  Insurance.................................................77
     Section 6.05.  Use of Proceeds...........................................78
     Section 6.06.  Indebtedness..............................................78
     Section 6.07.  Investments...............................................79
     Section 6.08.  Mergers, Etc..............................................81
     Section 6.09.  Limitation on Liens.......................................82
     Section 6.10.  Restricted Payments.......................................83
     Section 6.11.  Certain Financial Covenants...............................86
     Section 6.12.  Capital Expenditures......................................88
     Section 6.13.  Linden Property...........................................88
     Section 6.14.  Lines of Business.........................................89
     Section 6.15.  Transactions with Affiliates..............................89
     Section 6.16.  Additional Subsidiaries...................................90
     Section 6.17.  Amendments to Other Documents.............................92
     Section 6.18.  No Unfriendly Acquisitions................................93

                                      -ii-
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     Section 6.19.  Restrictive Agreements....................................93
     Section 6.20.  Purchase or Redemption of Subordinate Indebtedness........93
     Section 6.21.  Certain Matters Regarding Dispositions....................94
     Section 6.22.  Collateral Security.......................................94

     ARTICLE VII    EVENTS OF DEFAULT........................................100

     ARTICLE VIII   THE ADMINISTRATIVE AGENT.................................104
     Section 8.01.  Generally................................................104
     Section 8.02.  Collateral Security......................................106

     ARTICLE IX     MISCELLANEOUS............................................107
     Section 9.01.  Notices..................................................107
     Section 9.02.  Waivers; Amendments......................................107
     Section 9.03.  Expenses; Indemnity; Damage Waiver.......................109
     Section 9.04.  Successors and Assigns...................................110
     Section 9.05.  Survival.................................................113
     Section 9.06.  Counterparts; Integration; Effectiveness.................114
     Section 9.07.  Severability.............................................114
     Section 9.08.  Right of Setoff..........................................114
     Section 9.09.  Governing Law; Jurisdiction; Etc.........................114
     Section 9.10.  Waiver of Jury Trial.....................................115
     Section 9.11.  Headings.................................................115
     Section 9.12.  Treatment of Certain Information; Confidentiality........115

                          Schedules and Exhibits

SCHEDULE I     -   Commitments
SCHEDULE II    -   Material Agreements and Liens
SCHEDULE III   -   Restrictive Agreements
SCHEDULE IV    -   Litigation and Contingent Liabilities
SCHEDULE V     -   Environmental Matters
SCHEDULE VI    -   Subsidiaries and Investments
SCHEDULE VII   -   Real Property
SCHEDULE VIII  -   Unrestricted Entities

EXHIBIT A  -  Form of Assignment and Acceptance
EXHIBIT B  -  Form of Guarantee Assumption Agreement
EXHIBIT C  -  Form of LC Reimbursement Agreement

                                     -iii-
<PAGE>
               CREDIT AGREEMENT dated as of June 27, 2001 among ISP CHEMCO INC.,
a Delaware corporation, individually and as Lead Borrower, ISP CHEMICALS INC., a
Delaware corporation, ISP TECHNOLOGIES INC., a Delaware corporation, ISP
MINERALS INC., a Delaware corporation, the SUBSIDIARY GUARANTORS party hereto,
the LENDERS party hereto and THE CHASE MANHATTAN BANK, as Administrative Agent.

               The Borrowers and the Subsidiary Guarantors (each as defined
below) are engaged as an integrated group in the business of manufacturing,
distributing and selling specialty chemicals and related products, and in
related businesses, and in furnishing the required supplies, services,
equipment, credit and other facilities for such integrated operation. The
integrated operation requires financing on such a basis that credit supplied to
the Borrowers be made available from time to time to the Subsidiary Guarantors,
as required for the continued successful operation of the Borrowers and the
Subsidiary Guarantors, separately, and the integrated operation as a whole. In
that connection, each of the Obligors (as defined below) has requested the
Lenders to extend credit (by the making of loans and the issuance of, and
participation in, letters of credit) to or for account of the Borrowers (to be
used by the Borrowers and made available by the Borrowers to the Subsidiary
Guarantors) in an aggregate principal and face amount not exceeding $450,000,000
at any one time outstanding to finance the operations of the Borrowers and the
Subsidiary Guarantors, to refinance certain existing indebtedness as hereinafter
provided and for other general corporate purposes.

               The Lenders and the Administrative Agent (each as so defined)
propose to enter into this Agreement pursuant to which the Lenders will make
loans to and issue or participate in letters of credit for account of the
Borrowers, and each Subsidiary Guarantor jointly and severally will guarantee
repayment of the credit so extended to the Borrowers. Each of the Obligors
expects to derive benefit, directly or indirectly, from the credit so extended
to the Borrowers both in its separate capacity and as a member of the integrated
group, since the successful operation of each of the Borrowers and the
Subsidiary Guarantors is dependent on the continued successful performance of
the functions of the integrated group as a whole.

               Accordingly, the parties hereto agree as follows:

                                   ARTICLE I

                                   DEFINITIONS

               Section 1.01. Defined Terms. As used in this Agreement, the
following terms have the meanings specified below:

               "ABR", when used in reference to any Loan or Borrowing, refers to
whether such Loan, or the Loans constituting such Borrowing, are bearing
interest at a rate determined by reference to the Alternate Base Rate.

               "Adjusted LIBO Rate" means, for the Interest Period for any
Eurodollar Borrowing, an interest rate per annum (rounded upwards, if necessary,
to the next 1/16 of 1%)

                                Credit Agreement
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                                      -2-

equal to (a) the LIBO Rate for such Interest Period multiplied by (b) the
Statutory Reserve Rate for such Interest Period.

               "Adjusted Net Worth" means, on any date, the sum of the following
(without duplication) for the Chemco Consolidated Group as of such date
determined on a consolidated basis: (a) the amount of shareholder's equity of
the Chemco Consolidated Group, as reported on the balance sheet of the Chemco
Consolidated Group as of the Fiscal Quarter ending on, or most recently ended
prior to, such date, minus (b) the Special Capital Balance on such date.
Notwithstanding the foregoing, changes in cumulative translation adjustments
after the first Fiscal Quarter of 2001 shall not be deemed to increase (or
decrease) Adjusted Net Worth pursuant to Statement of Financial Accounting
Standards No. 52 of the Financial Accounting Standards Board.

               "Administrative Agent" means Chase, in its capacity as
administrative agent for the Lenders hereunder.

               "Administrative Questionnaire" means an Administrative
Questionnaire in a form supplied by the Administrative Agent.

               "Affiliate" means, with respect to a specified Person, another
Person that directly, or indirectly through one or more intermediaries, Controls
or is Controlled by or is under common Control with such specified Person, and,
if such specified Person is an individual, any member of the immediate family
(including parents, spouse, children and siblings) of such individual and any
trust whose principal beneficiary is such individual or one or more members of
such immediate family and any Person who is Controlled by any such member or
trust; provided that (a) no individual shall be an Affiliate of any member of
the Chemco Consolidated Group solely by reason of his or her being a director,
officer or employee of such member of the Chemco Consolidated Group and (b) no
member of the Chemco Consolidated Group shall be deemed to be an Affiliate of
any other member of the Chemco Consolidated Group.

               "Alternate Base Rate" means, for any day, a rate per annum equal
to the greater of (a) the Prime Rate in effect on such day and (b) the Federal
Funds Effective Rate for such day plus 0.50% per annum. Any change in the
Alternate Base Rate due to a change in the Prime Rate or the Federal Funds
Effective Rate shall be effective from and including the effective date of such
change in the Prime Rate or the Federal Funds Effective Rate, as the case may
be.

               "Applicable Level" means the applicable "Level" specified below:

               (a) for the period commencing on and including the date hereof
        and ending on but excluding the first Business Day after delivery to the
        Administrative Agent of consolidated financial statements for the second
        Fiscal Quarter of 2001 pursuant to Section 6.01(a), Level IV; and

               (b) at all times thereafter, the Level that the Total Debt
        Leverage Maintenance Ratio falls within in the table below determined as
        of the end of the immediately preceding Fiscal Quarter based upon the
        consolidated financial statements delivered pursuant to Section 6.01(a)
        or (b), and each change in the Applicable Level resulting from a change
        in the Total Debt Leverage Maintenance Ratio shall be effective,
        initially,

                                Credit Agreement
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                                      -3-

        as of the first Business Day after delivery of the financial statements
        described in clause (a) above and, thereafter, during the period
        commencing on the Business Day after delivery to the Administrative
        Agent of such consolidated financial statements indicating such change
        and ending on the date immediately preceding the effective date of the
        next such change:

                       Applicable Level

    Level                Total Debt Leverage
                          Maintenance Ratio

      I                   Less than 2.5 to 1

      II           Equal to or greater than 2.5 to 1
                     and less than 3.0 to 1

      III          Equal to or greater than 3 to 1
                     and less than 3.5 to 1

      IV           Equal to or greater than 3.5 to 1
                     and less than 4.5 to 1

      V            Equal to or greater than 4.5 to 1

provided that the Applicable Level shall not be less than Level IV at any time
on or prior to December 31, 2003; provided further that (i) at any time that an
Event of Default has occurred and is continuing or (ii) if the Lead Borrower
fails to deliver the consolidated financial statements required to be delivered
by it pursuant to Section 6.01(a) or (b) or the certificate required to be
delivered pursuant to Section 6.01(i), during the period from the expiration of
the time for delivery thereof until such consolidated financial statements and
certificate are delivered, the Applicable Level shall be Level V.

        [The remainder of this page has been intentionally left blank.]

                                Credit Agreement
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                                      -4-

               "Applicable Margin" means, for any day, (a) with respect to any
Loan, the applicable rate per annum set forth below under the column for the
Class and Type of such Loan and in the row opposite the Applicable Level in
effect on such day and (b) with respect to any Letter of Credit, the applicable
rate per annum set forth below under the column for Revolving Credit Eurodollar
Loans in the row opposite the Applicable Level in effect on such day:

                                  Applicable Margin
                                     (per annum)

  Applicable      Revolving Credit Loans and               Term Loans
    Level               Swingline Loans

                  Eurodollar       ABR Loans       Eurodollar       ABR Loans
                    Loans                            Loans

     I              1.75%            0.75%           2.50%            1.50%

     II             2.00%            1.00%           2.75%            1.75%

     III            2.25%            1.25%           2.75%            1.75%

     IV             2.50%            1.50%           3.00%            2.00%

     V              2.75%            1.75%           3.25%            2.25%

               "Applicable Percentage" means (a) with respect to any Revolving
Credit Lender for purposes of Sections 2.04 or 2.05 or in respect of any
indemnity claim under Section 9.03(c) arising out of an action or omission of
the Swingline Lender or the LC Bank under this Agreement, the percentage of the
total Revolving Credit Commitments represented by such Revolving Credit Lender's
Revolving Credit Commitment and (b) with respect to any Lender in respect of any
indemnity claim under Section 9.03(c) arising out of an action or omission of
the Administrative Agent under this Agreement, the percentage of the total
Commitments or Loans of both Classes hereunder represented by the aggregate
amount of such Lender's Commitments or Loans of both Classes hereunder. If the
Revolving Credit Commitments have terminated or expired, the Applicable
Percentages shall be determined based upon the Revolving Credit Commitments most
recently in effect, giving effect to any assignments.

               "Approved Fund" means, with respect to any Lender that is a fund
that invests in commercial loans, any other fund that invests in commercial
loans and is managed or advised by the same investment advisor as such Lender or
by an Affiliate of such investment advisor.

               "Assignment and Acceptance" means an assignment and acceptance
agreement entered into by a Lender and an assignee (with the consent of any
party whose consent is required by Section 9.04), and accepted by the
Administrative Agent, substantially in the form of Exhibit A or any other form
approved by the Administrative Agent.

                                Credit Agreement
<PAGE>
                                      -5-

               "Available Distribution Amount" has the meaning assigned to such
term in Section 6.10.

               "Bankruptcy Code" means the United States Bankruptcy Code, 11
U.S.C. Section 101 et seq.

               "Belleville Property" means that real property consisting of
approximately two acres located in Essex County, New Jersey at 11 William
Street, Belleville and owned by ISP Chemicals LLC, which plant was closed on or
about April 1, 2001.

               "Board" means the Board of Governors of the Federal Reserve
System of the United States of America.

               "Borrower" means each of ISP Chemco Inc., a Delaware corporation,
ISP Chemicals Inc., a Delaware corporation, ISP Technologies Inc., a Delaware
corporation, and ISP Minerals Inc., a Delaware corporation.

               "Borrowing" means (a) all Syndicated ABR Loans of the same Class
made, converted or continued on the same date, (b) all Eurodollar Loans of the
same Class that have the same Interest Period or (c) a Swingline Loan.

               "Borrowing Request" means a request by the Lead Borrower for a
Syndicated Borrowing in accordance with Section 2.03.

               "Business Day" means any day (a) that is not a Saturday, Sunday
or other day on which commercial banks in New York City are authorized or
required by law to remain closed and (b) if such day relates to a borrowing of,
a payment or prepayment of principal of or interest on, a continuation or
conversion of or into, or an Interest Period for, a Eurodollar Borrowing, or to
a notice by the Lead Borrower with respect to any such borrowing, payment,
prepayment, continuation, conversion, or Interest Period, that is also a day on
which dealings in Dollar deposits are carried out in the London interbank
market.

               "Capital Expenditures" means, for any period, expenditures
(including the aggregate amount of Capital Lease Obligations incurred during
such period) made by any member of the Chemco Consolidated Group to acquire or
construct fixed assets, plant and equipment (including renewals, improvements
and replacements, but excluding repairs) during such period computed in
accordance with GAAP; provided that the aggregate amount of any Capital Lease
Obligation incurred during such period shall exclude the amount of expenditures,
if any, that were included in Capital Expenditures for a prior period with
respect to the same property that is the subject of such Capital Lease
Obligation.

               "Capital Lease Obligations" means, with respect to any Person,
the obligations of such Person to pay rent or other amounts under a lease of (or
other agreement conveying the right to use) real and/or personal property which
obligations are required to be classified and accounted for as a capital lease
on a balance sheet of such Person under GAAP (including Statement of Financial
Accounting Standards No. 13 of the Financial Accounting Standards Board).

                                Credit Agreement
<PAGE>
               "Cash Equivalents" means (a) readily marketable direct
obligations issued or unconditionally guaranteed or insured by the United States
of America or any agency or instrumentality thereof and backed by the full faith
and credit of the United States of America, in each case maturing within 90 days
from the date of acquisition thereof, (b) commercial paper maturing within 90
days from the date of acquisition thereof and having a rating of at least A-1
(or its equivalent) from Standard & Poor's and P-1 (or its equivalent) from
Moody's, (c) readily redeemable shares of money market mutual funds having a
rating of at least A-1 (or its equivalent) from Standard & Poor's and P-1 (or
its equivalent) from Moody's, and the Dreyfus Government Cash Management and the
Dreyfus Cash Management Plus Inc., (d) certificates of deposit and bankers'
acceptances, in each case maturing within 90 days from the date of acquisition
thereof and issued or accepted by any domestic office of any commercial bank
organized under the laws of the United States of America or any State thereof
which has a combined capital and surplus and undivided profits in an amount of
not less than $500,000,000, (e) cash balances standing to the credit of the
Collateral Account and (f) fully collateralized reverse repurchase agreements
relating to readily marketable securities in respect of the obligations
described in clause (a) of this definition, with a term of not more than 30 days
and entered into with (i) any bank satisfying the criteria described in clause
(d) of this definition, (ii) any primary dealer of United States government
securities or (iii) any other Person principally engaged in the "repo" market
and having a counterparty rating of at least AAA (or its equivalent) from
Standard & Poor's and Aaa (or its equivalent) from Moody's, provided that the
terms of such agreements comply with the guidelines set forth in the Federal
Financial Institutions Examination Council Supervisory Policy Repurchase
Agreements of Depository Institutions With Securities Dealers and Others, as
adopted by the Comptroller of the Currency on October 31, 1985.

               "Casualty Event" means, with respect to any property of any
Person, any loss of or damage to, or any condemnation or other taking of, such
property for which such Person or any of its Subsidiaries or Affiliates
receives, or directs the payment of, insurance proceeds, or proceeds of a
condemnation award or other compensation.

               "Change in Law" means (a) the adoption of any law, rule or
regulation after the date hereof, (b) any change in any law, rule or regulation
or in the interpretation or application thereof by any Governmental Authority
after the date hereof or (c) compliance by any Lender or the LC Bank (or, for
purposes of Section 2.14(b), by any lending office of such Lender or by such
Lender's or the LC Bank's holding company, if any) with any request, guideline
or directive (whether or not having the force of law) of any Governmental
Authority made or issued after the date hereof.

               "Chase" means The Chase Manhattan Bank.

               "Chemco" means ISP Chemco Inc., a Delaware corporation.

               "Chemco Consolidated Group" means, collectively, Chemco and each
of the other members of the Chemco Group the financial statements of which are
(or should be) consolidated with the financial statements of Chemco in
accordance with GAAP; and a "member" of the Chemco Consolidated Group means any
such Person.

                                Credit Agreement
<PAGE>
                                      -7-

               "Chemco Group" means, collectively, Chemco and its Subsidiaries,
including the other Borrowers, but excluding the Unrestricted Entities; and a
"member" of the Chemco Group means any such Person.

               "Chemco Restructuring" means (i) the issuance of the Required
Senior Subordinated Debt and the application of the proceeds thereof, (ii) the
incurrence of Indebtedness pursuant to this Agreement and (iii) the internal
restructuring of ISP to separate its investment assets from its specialty
chemicals business and pursuant to which the investment assets, associated
short-term debt and the outstanding stock of certain subsidiaries of ISP have
been, or will be, transferred to ISP Investco LLC, a Subsidiary of ISP.

               "Class": (a) when used in reference to any Loan or Borrowing,
refers to whether such Loan, or the Loans constituting such Borrowing, are
Revolving Credit Loans, Term Loans or Swingline Loans, (b) when used in
reference to any Commitment, refers to whether such Commitment is a Revolving
Credit Commitment or Term Loan Commitment and (c) when used in reference to
Lenders, refers to whether such Lenders are Revolving Credit Lenders or Term
Loan Lenders.

               "Closing Date Mortgaged Property" has the meaning assigned to
such term in Section 4.17.

               "Code" means the Internal Revenue Code of 1986.

               "Collateral" means all property that is subject (or purported to
be subject) to each Lien in favor of the Administrative Agent pursuant to the
Security Documents, and shall include (a) all property within the meaning of the
term "Collateral" as defined in Section 3 of the Pledge and Security Agreement
and (b) all obligations owing by Chemco or any Subsidiary of Chemco to any
Obligor.

               "Collateral Account" has the meaning assigned to such term in
Section 4.01 of the Pledge and Security Agreement.

               "Commitment" means a Revolving Credit Commitment or Term Loan
Commitment, or any combination thereof (as the context requires).

               "Continuing Director" means, on any date of determination, an
individual who either (a) on the date hereof, is a member of the Board of
Directors of ISP, (b) as of such date of determination, has been a member of
such Board of Directors for at least the 12 preceding months, or (c) has been
approved to be a member of such Board of Directors by a majority of the other
Continuing Directors then in office.

               "Control" means the possession, directly or indirectly, of the
power to direct or cause the direction of the management or policies of a
Person, whether through the ability to exercise voting power, by contract or
otherwise, including in any case the ability, directly or indirectly, to
exercise 10% or more of the voting power (a) for the election of directors or
other governing body of a corporation, (b) of the general partners of a
partnership or (c) of any other management or ownership interests in any other
Person. "Controlling" and "Controlled" have meanings correlative thereto.

                                Credit Agreement
<PAGE>
                                      -8-

               "Credit Documents" means, collectively, this Agreement, any
Notes, the LC Documents, the Security Documents and any fee letter entered into
by any Borrower in connection with the transactions contemplated hereby.

               "Default" means any event or condition which upon notice, lapse
of time or both would, unless cured or waived, become an Event of Default.

               "Determination Date" means (a) the last day of each Fiscal
Quarter, (b) the date that any Loan is (or is proposed to be) made or that any
Letter of Credit is (or is proposed to be) issued, amended, renewed or extended,
(c) the date that each Restricted Payment is (or is proposed to be) made
pursuant to Section 6.10, (d) each date as of which the Administrative Agent
shall request a determination of compliance with any or all of Sections 6.06(e),
6.07, 6.09, 6.10, 6.11 and 6.12 and (e) each other date on or as of which
compliance with the financial covenants of Section 6.11 shall be required to be
determined pursuant to this Agreement, including the date on which Qualified
Senior Subordinated Debt is (or is proposed to be) incurred and as provided in
Section 6.08.

               "Disclosed Matters" means the actions, suits and proceedings
disclosed in Schedule IV and the environmental matters disclosed in Schedule V.

               "Disposition" means, with respect to any Person, any sale,
assignment, lease, transfer or other disposition of any property (whether now
owned or hereafter acquired) by such Person (including dispositions pursuant to
merger, consolidation, amalgamation and sale-leaseback transactions) to any
other Person and any Casualty Event, provided that any Restricted Payment made
pursuant to Section 6.10 shall not be a "Disposition" to the extent permitted
thereunder; provided further that any issuance of shares of capital stock or
other equity interests by any Subsidiary of such Person or any other Person in
which such Person owns equity interests (unless such Person holds such equity
interests in such other Person solely as an investment and without Control or a
view to participating in the management of such other Person) shall be deemed to
be a "Disposition" by such Subsidiary or such other Person of the equity
interests issued by such Subsidiary or such other Person.

               "Dollar Equivalent" means, with respect to any sum, on any day,
(a) if such sum is denominated in Dollars, such sum, and (b) if such sum is
denominated in a currency other than Dollars, the amount of Dollars equivalent
to such sum determined by reference to the spot rate of exchange in the
commercial bank foreign exchange market in London for the purchase by the
Administrative Agent (in its individual capacity) of such currency with Dollars
at approximately 11:00 a.m. London time on the date two Business Days preceding
such day, as determined by the Administrative Agent.

               "Dollars" or "$" refers to lawful money of the United States of
America.

               "EBITDA" means, for any period, the following amount in respect
of the Chemco Consolidated Group determined on a consolidated basis for such
period (without duplication): (a) income before income taxes and extraordinary
items (extraordinary items to include in any event gains and losses on
dispositions of property not in the ordinary course of business), plus (b) the
amount of dividends actually received by an Obligor during such period in
respect of

                                Credit Agreement
<PAGE>
                                      -9-

income attributable to Unrestricted Entities and other Persons (other than any
members of the Chemco Consolidated Group), plus (c) interest expense for such
period determined in accordance with GAAP, plus (d) depreciation of fixed
assets, plus (e) amortization of goodwill.

               Notwithstanding the foregoing: EBITDA shall be deemed to be equal
to $44,400,000 (for the second Fiscal Quarter of 2000), $38,000,000 (for the
third Fiscal Quarter of 2000), $32,100,000 (for the fourth Fiscal Quarter of
2000), $41,200,000 (for the first Fiscal Quarter of 2001); EBITDA for the second
Fiscal Quarter of 2001 shall be calculated on a pro forma basis as provided in
Section 1.04(e); and EBITDA shall be subject to additive adjustments for fees,
costs, expenses and other items incurred in connection with the Chemco
Restructuring.

               If at any time during such period a member of the Chemco
Consolidated Group shall sell or otherwise dispose of, purchase or otherwise
acquire (whether by merger or otherwise), dividend or otherwise distribute as a
Restricted Payment, or contribute to an Unrestricted Entity as an equity
investment, any Business (as defined below), EBITDA shall be calculated after
giving pro forma effect to such transaction as if such transaction occurred on
the first day of such period. If any member of the Chemco Consolidated Group
shall be designated as an Unrestricted Entity, EBITDA shall be calculated after
giving pro forma effect to such transaction as if such transaction occurred on
the first day of the Fiscal Quarter in which such transaction shall have
occurred. If any Unrestricted Entity shall be designated as a Restricted
Subsidiary, EBITDA shall be calculated after giving pro forma effect to such
transaction as if such transaction occurred on the first day of the Fiscal
Quarter immediately following the Fiscal Quarter in which such transaction shall
have occurred. For purposes of this definition, "Business" means (i) all or
substantially all of the assets of a Person related to the operation of a line
of business by such Person, including all or substantially all assets and other
properties that are necessary or useful in the operation of that line of
business or (ii) all or substantially all of the capital stock of a Person which
conducts business or owns property.

               "Effective Date" has the meaning assigned to such term in Section
5.01.

               "Environmental Laws" means any and all present and future
Federal, state, local and foreign laws, rules or regulations, and any and all
orders or decrees, in each case as now or hereafter in effect, relating to the
regulation or protection of human health, safety or the environment or to
emissions, discharges, releases or threatened releases of pollutants,
contaminants, chemicals or toxic or hazardous substances or wastes into the
indoor or outdoor environment, including ambient air, soil, surface water,
ground water, wetlands, land or subsurface strata, or otherwise relating to the
manufacture, processing, distribution, use, treatment, storage, disposal,
transport or handling of pollutants, contaminants, chemicals or toxic or
hazardous substances or wastes.

               "ERISA" means the Employee Retirement Income Security Act of
1974.

               "ERISA Affiliate" means any trade or business (whether or not
incorporated) that, together with the Borrower, is treated as a single employer
under Section 414(b) or (c) of the Code, or, solely for purposes of Section 302
of ERISA and Section 412 of the Code, is treated as a single employer under
Section 414 of the Code.

                                Credit Agreement
<PAGE>
                                      -10-

               "ERISA Event" means (a) any "reportable event", as defined in
Section 4043 of ERISA or the regulations issued thereunder with respect to a
Plan (other than an event for which the 30-day notice period is waived); (b) the
existence with respect to any Plan of an "accumulated funding deficiency" (as
defined in Section 412 of the Code or Section 302 of ERISA), whether or not
waived; (c) the filing pursuant to Section 412(d) of the Code or Section 303(d)
of ERISA of an application for a waiver of the minimum funding standard with
respect to any Plan; (d) the incurrence by Chemco or any of its ERISA Affiliates
of any liability under Title IV of ERISA with respect to the termination of any
Plan; (e) the receipt by Chemco or any ERISA Affiliate from the PBGC or a plan
administrator of any notice relating to an intention to terminate any Plan or
Plans or to appoint a trustee to administer any Plan; (f) the incurrence by
Chemco or any of its ERISA Affiliates of any liability with respect to the
withdrawal or partial withdrawal from any Plan or Multiemployer Plan; or (g) the
receipt by Chemco or any ERISA Affiliate of any notice, or the receipt by any
Multiemployer Plan from Chemco or any ERISA Affiliate of any notice, concerning
the imposition of Withdrawal Liability or a determination that a Multiemployer
Plan is, or is expected to be, insolvent or in reorganization, within the
meaning of Title IV of ERISA.

               "Eurodollar", when used in reference to any Loan or Borrowing,
refers to whether such Loan, or the Loans constituting such Borrowing, are
bearing interest at a rate determined by reference to the Adjusted LIBO Rate.

               "Event of Default" has the meaning assigned to such term in
Article VII.

               "Excluded Disposition" means:

               (a) any sale of inventory in the ordinary course of business and
        on ordinary business terms;

               (b) any sale, assignment, transfer or other disposition of any
        property described in any of clauses (a), (b), (c) and (d) of Section
        6.07 or any obsolete or worn-out equipment, or equipment that is
        replaced with like equipment of equal or greater value, in the ordinary
        course of business;

               (c) any non-recourse sale of accounts receivable made pursuant to
        a Qualified Securitization Program;

               (d) any sale, assignment, transfer or other disposition of
        property by one member of the Chemco Consolidated Group to another
        member of the Chemco Consolidated Group; and

               (e) any Investment made in an Unrestricted Entity and any other
        cash payment made by such Person in the ordinary course of business;

provided that any sale, assignment, lease, transfer or other disposition of
property that is not permitted under the Credit Documents shall not be an
"Excluded Disposition" to the extent that it is not permitted.

                                Credit Agreement
<PAGE>
                                      -11-

               "Excluded Taxes" means, with respect to the Administrative Agent,
any Lender, the LC Bank or any other recipient of any payment to be made by or
on account of any obligation of the Borrowers hereunder, (a) income or franchise
taxes imposed on (or measured by) its net income or overall gross receipts or
franchise taxes imposed in lieu thereof by the United States of America, or by
the jurisdiction under the laws of which such recipient is organized or in which
its principal office is located or, in the case of any Lender, in which its
applicable lending office is located, in each case inclusive of any such taxes
imposed by any political subdivision of such jurisdiction, (b) any branch
profits taxes imposed by the United States of America or any similar tax imposed
by any other jurisdiction in which any Borrower is located, (c) in the case of a
Foreign Lender (other than an assignee pursuant to a request by the Lead
Borrower under Section 2.18(b)), any tax that otherwise would be an Indemnified
Tax but that is imposed on amounts payable to such Foreign Lender at the time
such Foreign Lender becomes a party to this Agreement, except to the extent that
such Lender's assignor (if any) was entitled, at the time of assignment, to
receive additional amounts from the Borrowers with respect to such withholding
tax pursuant to Section 2.16(a) and (d) in the case of any Lender, any Tax that
would be an Indemnified Tax but that is attributable to such Lender's failure or
inability (other than as a result of a Change in Law) to comply with Section
2.16(e).

               "Existing Credit Agreement" means the $400,000,000 Credit
Agreement dated as of July 26, 1996 among ISP Chemicals Inc. and ISP
Technologies Inc., as borrowers, International Specialty Products Inc., as
parent guarantor, the Subsidiary Guarantors party thereto, the Lenders party
thereto and Chase, as Agent, as in effect on the date hereof.

               "Existing Letters of Credit" means the "Letters of Credit" under
(and as defined in) the Existing Credit Agreement, issued by Chase and which are
outstanding on the Effective Date.

               "Federal Funds Effective Rate" means, for any day, the weighted
average (rounded upwards, if necessary, to the next 1/100 of 1%) of the rates on
overnight Federal funds transactions with members of the Federal Reserve System
arranged by Federal funds brokers, as published on the next succeeding Business
Day by the Federal Reserve Lender of New York, or, if such rate is not so
published for any day that is a Business Day, the average (rounded upwards, if
necessary, to the next 1/100 of 1%) of the quotations for such day for such
transactions received by the Administrative Agent from three Federal funds
brokers of recognized standing selected by it.

               "Financial Officer" means, with respect to any Obligor, (a) the
chief financial officer, principal accounting officer or treasurer of such
Obligor or (b) any Senior Officer of such Obligor, or other individual
designated as a "financial officer" hereunder by such Obligor (or, in the case
of the Lead Borrower, each Borrower) in a writing delivered to the
Administrative Agent, with direct knowledge of the Transactions and
responsibility for the applicable subject matter.

               "Fiscal Quarter" means a fiscal quarter of the Chemco
Consolidated Group.

               "Fiscal Year" means an annual period ending on December 31.

                                Credit Agreement
<PAGE>
                                      -12-

               "Foreign Lender" means any Lender that is organized under the
laws of a jurisdiction other than that in which the Borrowers are located. For
purposes of this definition, the United States of America, each State thereof
and the District of Columbia shall be deemed to constitute a single
jurisdiction.

               "Foreign Subsidiary" means any Subsidiary of Chemco that is
organized under the laws of a jurisdiction other than the United States of
America, any State thereof or the District of Columbia.

               "GAAP" means generally accepted accounting principles in the
United States of America applied on a basis consistent with those which, in
accordance with the last sentence of Section 1.04(a), are to be used in making
the calculations for purposes of determining compliance with this Agreement.

               "G-I Holdings" means G-I Holdings Inc., a Delaware corporation.

               "Governmental Authority" means the government of the United
States of America, or of any other nation, or any political subdivision thereof,
whether state or local, and any agency, authority, instrumentality, regulatory
body, court, central bank or other entity exercising executive, legislative,
judicial, taxing, regulatory or administrative powers or functions of or
pertaining to government.

               "Guarantee" means (a) a guarantee, an endorsement, a contingent
agreement to purchase or to furnish funds for the payment or maintenance of, or
otherwise to be or become contingently liable under or with respect to, the
Indebtedness, other obligations, net worth, working capital or earnings of any
Person (other than a member of the Obligors), (b) a guarantee of the payment of
dividends or other distributions upon the stock or equity interests of any
Person or (c) an agreement to purchase, sell or lease (as lessee or lessor)
Property, products, materials, supplies or services primarily for the purpose of
enabling a debtor to make payment of such debtor's obligations or an agreement
to assure a creditor against loss, and including causing a bank or other
financial institution to issue a letter of credit or other similar instrument
for the benefit of another Person, but excluding endorsements for collection or
deposit in the ordinary course of business. The terms "guarantee" and
"guaranteed" used as a verb shall have correlative meanings.

               "Guarantee Assumption Agreement" means a Guarantee Assumption
Agreement substantially in the form of Exhibit B by an entity that, pursuant to
Section 6.16(a), is required to become a "Subsidiary Guarantor".

               "Hazardous Material" means, collectively, (a) any petroleum or
petroleum products, inflammables, explosives, radioactive materials, asbestos in
any form that is or could become friable, urea formaldehyde foam insulation, and
transformers or other equipment that contain dielectric fluid containing
polychlorinated biphenyls (PCB's); (b) any chemicals or other materials or
substances which are now or hereafter become defined as or included in the
definition of "hazardous substances", "hazardous wastes", "hazardous materials",
"extremely hazardous wastes", "restricted hazardous wastes", "toxic substances",
"toxic pollutants", "contaminants", "pollutants" or words of similar import
under any Environmental Law; and

                                Credit Agreement
<PAGE>
(c) any other chemical or other material or substance, exposure to which is now
or hereafter prohibited, limited or regulated under any Environmental Law.

               "Hedge Agreement" means any swap agreement, cap agreement, collar
agreement, futures contract, forward contract or similar agreement or
arrangement entered into to protect against or mitigate the effect of
fluctuations in interest rates, foreign exchange rates or prices of commodities
used in the business of the Chemco Consolidated Group.

               "Indebtedness" means, with respect to any Person, without
duplication: (a) all obligations of such Person for borrowed money or with
respect to deposits or advances of any kind; (b) all obligations of such Person
evidenced by bonds, debentures, notes or similar instruments; (c) all
obligations of such Person upon which interest charges are customarily paid; (d)
all obligations of such Person for the deferred purchase price of property or
services, except trade accounts payable (other than for borrowed money) arising
in the ordinary course of business which are not overdue by more than 90 days;
(d) all Capital Lease Obligations of such Person; (e) all Indebtedness of others
secured by a Lien on any property of such Person (whether or not such
Indebtedness has been assumed by such Person) or Guaranteed by such Person
(whether or not any such Guarantee is limited in amount or is a non-recourse
obligation); (f) any Guarantee of the performance of any obligation of or
completion of any project by any other Person; and (g) all obligations of such
Person, contingent or otherwise, in respect of any letters of credit or bankers'
acceptances; provided that Indebtedness shall not include obligations in respect
of (i) Hedge Agreements or (ii) the honoring by a Lender of a check, draft or
similar instrument, wire transfer or electronic transfer of funds, drawn or
debited against insufficient funds in the ordinary course of business so long
as, in the case of this clause (iii), such obligations are extinguished within
three Business Days after their incurrence.

               "Indemnified Taxes" means Taxes other than Excluded Taxes and
Other Taxes.

               "Initial Settlement Date" has the meaning assigned to such term
in Section 2.10(b)(i).

               "Interest Election Request" means a request by the Lead Borrower
to convert or continue a Syndicated Borrowing in accordance with Section 2.07.

               "Interest Expense" means, for any period, without duplication,
the sum of (a) all (i) interest and (ii) commitment fees for unused credit
availability, facility fees, utilization fees, letter of credit fees, issuance
fees and similar periodically recurring fees (excluding up-front, agency,
engagement, syndication and arrangement fees), related to Indebtedness
(including imputed interest on Capital Lease Obligations) of members of the
Chemco Consolidated Group accrued or capitalized for such period determined on a
consolidated basis, plus (b) the aggregate amount of net payments made or to be
made relating to interest in respect of such period under any Hedge Agreement,
minus (c) the aggregate amount of net payments received or to be received
relating to interest in respect of such period under any Hedge Agreement.

               Notwithstanding the foregoing: Interest Expense shall be deemed
to be equal to $11,300,000 (for the second Fiscal Quarter of 2000), $11,200,000
(for the third Fiscal Quarter of 2000), $9,800,000 (for the fourth Fiscal
Quarter of 2000) and $10,300,000 (for the first Fiscal Quarter of 2001); and for
the second Fiscal Quarter of 2001, Interest Expense shall be calculated

                                Credit Agreement
<PAGE>
                                      -14-

as provided above after giving pro forma effect to the Loans and Letters of
Credit hereunder and the incurrence of the Required Senior Subordinated Debt as
if the aggregate principal amount of the Loans, the aggregate undrawn face
amount of the Letters of Credit and the aggregate principal amount of the
Required Senior Secured Debt outstanding on the last day of such Fiscal Period
were outstanding in such aggregate amount on each day during such Fiscal Quarter
and the respective interest rates thereon, and fees with respect thereto, in
effect on the last day of such Fiscal Quarter, applied to such Loans, Letters of
Credit and Required Senior Subordinated Debt on each day during such Fiscal
Quarter.

               If at any time during such period a member of the Chemco
Consolidated Group shall sell or otherwise dispose of, dividend or otherwise
distribute as a Restricted Payment, or contribute to an Unrestricted Entity as
an equity investment, any Business (as defined below), such transaction shall,
for purposes of calculating Interest Expense, be deemed to have occurred on the
first day of such period, and Interest Expense for such period shall be reduced
by the sum (without duplication) of:

               (1) the amount of Interest Expense for such period attributable
        to Indebtedness directly relating to such Business that is repaid with
        proceeds from such transaction, is otherwise discharged in connection
        with such transaction, or is assumed by the purchaser in connection
        therewith (in each case so long as no member of the Chemco Consolidated
        Group remains liable for such Indebtedness) during such period; plus

               (2) an amount equal to the amount of interest that would have
        accrued during such period on Revolving Credit Eurodollar Loans on a
        principal amount equal to the aggregate amount of cash and cash
        equivalents received in connection with such transaction (net of the
        aggregate amount of actual selling expenses incurred by the Chemco
        Consolidated Group in connection with such transaction and net of taxes
        paid or estimated to be payable in cash by the Chemco Consolidated Group
        in connection with such transaction) (or, if a Financial Officer of the
        Lead Borrower can demonstrate to the reasonable satisfaction of the
        Required Lenders that a rate of interest different from that provided
        under this Agreement should be used for such purpose, such different
        interest rate).

               If at any time during such period a member of the Chemco
Consolidated Group shall have purchased or acquired (whether by merger or
otherwise) a Business, such transaction shall, for purposes of calculating
Interest Expense, be deemed to have occurred on the first day of such period,
and Interest Expense for such period shall be calculated as if (x) the aggregate
purchase price for such transaction were financed with Indebtedness, and (y) the
interest rates applicable to such Indebtedness were, throughout such period,
equal to the interest rates applicable to Revolving Credit Eurodollar Loans made
from time to time under this Agreement throughout such period (or, if a
Financial Officer of the Lead Borrower can demonstrate to the reasonable
satisfaction of the Required Lenders that a different interest rate should be
used for such purpose, such different interest rate). For purposes of this
definition, "Business" means (i) all or substantially all of the assets of a
Person related to the operation of a line of business by such Person, including
all or substantially all assets and other properties that are necessary or
useful in the operation of that line of business or (ii) all or substantially
all of the capital stock of a Person that conducts business or owns property.

                                Credit Agreement
<PAGE>
                                      -15-

               If any member of the Chemco Consolidated Group shall be
designated as an Unrestricted Entity, such transaction shall, for purposes of
calculating Interest Expense, be deemed to have occurred on the first day of the
Fiscal Quarter in which such transaction shall have occurred, and Interest
Expense for such Fiscal Quarter shall be reduced by the amount of Interest
Expense during such Fiscal Quarter, accrued or capitalized to the date of such
transaction, attributable to Indebtedness directly relating to such Unrestricted
Entity. If the designation of any Unrestricted Entity shall be withdrawn,
Interest Expense for the Fiscal Quarter in which such transaction shall have
occurred shall be reduced by the amount of Interest Expense accrued or
capitalized during such Fiscal Quarter, from the date of such transaction,
attributable to Indebtedness directly relating to such Unrestricted Entity.

               "Interest Payment Date" means (a) with respect to any Syndicated
ABR Loan, each Quarterly Date and date that such Loan is required to be repaid,
(b) with respect to any Eurodollar Loan, the last day of each Interest Period
therefor and, in the case of any Interest Period of more than three months'
duration, each day prior to the last day of such Interest Period that occurs at
three-month intervals after the first day of such Interest Period and (c) with
respect to any Swingline Loan, the date that such Loan is required to be repaid.

               "Interest Period" means, for any Eurodollar Loan or Borrowing,
the period commencing on the date of such Loan or Borrowing and ending on the
numerically corresponding day in the calendar month that is one, two, three or
six months thereafter, as specified in the applicable Borrowing Request or
Interest Election Request; provided that (i) if any Interest Period would end on
a day other than a Business Day, such Interest Period shall be extended to the
next succeeding Business Day unless such next succeeding Business Day would fall
in the next calendar month, in which case such Interest Period shall end on the
next preceding Business Day and (ii) any Interest Period that commences on the
last Business Day of a calendar month (or on a day for which there is no
numerically corresponding day in the last calendar month of such Interest
Period) shall end on the last Business Day of the last calendar month of such
Interest Period. For purposes hereof, the date of a Loan initially shall be the
date on which such Loan is made and thereafter shall be the effective date of
the most recent conversion or continuation of such Loan, and the date of a
Syndicated Borrowing comprising Loans that have been converted or continued
shall be the effective date of the most recent conversion or continuation of
such Loans.

               "Investment" means, for any Person: (a) the acquisition (whether
for cash, property, services or securities or otherwise) of capital stock,
bonds, notes, debentures, partnership or other ownership interests or other
securities of any other Person or any agreement to make any such acquisition,
any "short sale" or any sale of any securities at a time when such securities
are not owned by the Person entering into such sale; (b) the making of any
deposit with, or advance, loan or other extension of credit to, any other
Person, including the purchase of property from another Person subject to an
understanding or agreement, contingent or otherwise, to resell such property to
such Person, but excluding (i) any such advance, loan or extension of credit
having a term not exceeding 90 days (except to the extent arising pursuant to a
sale to a buyer outside of the United States of America, in which case such term
shall not exceed 360 days) representing the purchase price of inventory or
supplies sold by such Person in the ordinary course of business, (ii) amounts
owing by such Person under an installment-sale contract for obsolete or worn-out
goods sold by a member of the Chemco Consolidated Group not exceeding
$10,000,000 at any one time for the Chemco Consolidated Group taken as a

                                Credit Agreement
<PAGE>
                                      -16-

whole, (iii) pledges and deposits that are Permitted Liens under Sections
6.09(c) and 6.09(d) and (iv) contingent payments and escrowed amounts in
connection with a permitted Disposition; (c) the entering into of any Guarantee
of, or other contingent obligation with respect to, any Indebtedness or other
liability of any other Person and (without duplication) any amount committed to
be advanced, lent or extended to such Person (except to the extent such
Guarantee is of any obligation described in clause (b)(i), (b)(ii) or (b)(iii)
above); or (d) the entering into of any Hedge Agreement.

               "ISP" means International Specialty Products Inc, a Delaware
corporation.

               "ISP Fine Tech" means the assets acquired by ISP from Fine Tech,
Ltd., a pharmaceutical research company based in Haifa, Israel.

               "ISP Funding" means International Specialty Products Funding
Corporation, a Delaware corporation.

               "ISP 2002 Notes" means the Indebtedness in respect of the 9-3/4%
Senior Notes due February 2002, issued by ISP in an original aggregate principal
amount equal to $199,900,000.

               "ISP 2003 Notes" means the Indebtedness in respect of the 9%
Senior Notes due October 2003, issued by ISP in an original aggregate principal
amount equal to $324,500,000.

               "LC Bank" and "Letter of Credit Bank" means Chase, in its
capacity as the issuer of Letters of Credit hereunder, and its successors in
such capacity as provided in Section 2.05(j).

               "LC Disbursement" means a payment made by the LC Bank pursuant to
a Letter of Credit.

               "LC Documents" means, with respect to any Letter of Credit,
collectively, any application or any LC Reimbursement Agreement therefor and any
other agreements, instruments, guarantees or other documents (whether general in
application or applicable only to such Letter of Credit) governing or providing
for (a) the rights and obligations of the parties concerned or at risk with
respect to such Letter of Credit or (b) any collateral security for any of such
obligations.

               "LC Exposure" means, at any time, the sum of (a) the aggregate
undrawn amount of all outstanding Letters of Credit at such time plus (b) the
aggregate amount of all LC Disbursements that have not yet been reimbursed by or
on behalf of the Borrowers at such time. The LC Exposure of any Lender at any
time shall be its Applicable Percentage of the total LC Exposure at such time.

               "LC Reimbursement Agreement" means an LC Reimbursement Agreement
entered into by a Person (other than an Obligor) for account of which a Letter
of Credit shall be issued, the Lead Borrower and the LC Bank, substantially in
the form of Exhibit C and satisfactory to the Administrative Agent.

               "Lead Arranger" means J.P. Morgan Securities Inc.

                                Credit Agreement
<PAGE>
                                      -17-

               "Lead Borrower" means Chemco, in its capacity as agent for the
Borrowers under the Credit Documents and the other Obligors under the Pledge and
Security Agreement.

               "Lenders" means the Persons listed on Schedule I and any other
Person that shall have become a party hereto pursuant to an Assignment and
Acceptance, other than any such Person that ceases to be a party hereto pursuant
to an Assignment and Acceptance. Unless the context otherwise requires, the term
"Lenders" includes the Swingline Lender.

               "Letter of Credit" means any letter of credit issued or continued
pursuant to this Agreement, including the Existing Letters of Credit.

               "LIBO Rate" means, for the Interest Period for any Eurodollar
Borrowing, the rate appearing on Page 3750 of the Telerate Service (or on any
successor or substitute page of such Service, or any successor to or substitute
for such Service, providing rate quotations comparable to those currently
provided on such page of such Service, as determined by the Administrative Agent
from time to time for purposes of providing quotations of interest rates
applicable to Dollar deposits in the London interbank market) at approximately
11:00 a.m., London time, two Business Days prior to the commencement of such
Interest Period, as the rate for the offering of Dollar deposits with a maturity
comparable to such Interest Period. In the event that such rate is not available
at such time for any reason, then the LIBO Rate for such Interest Period shall
be the rate at which Dollar deposits of $5,000,000 and for a maturity comparable
to such Interest Period are offered by the principal London office of the
Administrative Agent (in its individual capacity) in immediately available funds
in the London interbank market at approximately 11:00 a.m., London time, two
Business Days prior to the commencement of such Interest Period.

               "Lien" means, with respect to any asset, (a) any mortgage, deed
of trust, lien, pledge, hypothecation, encumbrance, adverse claim, charge or
security interest in, on, against or of such asset, (b) the interest of a vendor
or a lessor under any conditional sale agreement, capital lease or title
retention agreement (or any financing lease having substantially the same
economic effect as any of the foregoing) relating to such asset and (c) in the
case of securities, any purchase option, call or similar right of a third party
with respect to such securities.

               "Linden Joint Venture" means a Person in which a member of the
Chemco Group makes or has made an Investment, which Person is an Unrestricted
Entity and which Person has been formed to operate and manage a hazardous-waste
incinerator at the Linden Property.

               "Linden Property" means that real property consisting of
approximately 140 acres located in Union County, New Jersey at the foot of South
Wood Avenue, Linden and owned by ISP Environmental Services Inc., which is the
site of a former chemicals manufacturing facility of GAF Chemicals Corporation.

               "Loans" means the loans made by the Lenders to the Borrowers
pursuant to this Agreement.

               "Management Agreement" means the Amended and Restated Management
Agreement dated as of January 1, 1999 among GAF Corporation, G-I Holdings, G
Industries Corp., Merick Inc., GAF Fiberglass Corporation, International
Specialty Products Inc.,

                                Credit Agreement
<PAGE>
                                      -18-

GAF Building Materials Corporation, GAF Broadcasting Company, Inc., Building
Materials Corporation of America, ISP Management Company Inc. (as assignee of
Chemco, when known as ISP OPCO Holdings Inc.).

               "Margin Stock" means "margin stock" within the meaning of
Regulations T, U and X of the Board.

               "Material Adverse Effect" means a material adverse effect on any
of (a) the property, business, operations, financial condition, prospects of the
Chemco Group taken as a whole, (b) the validity or enforceability of any of the
Credit Documents or (c) the rights and remedies of the Lenders, the LC Bank and
the Administrative Agent under any of the Credit Documents.

               "Materials Business" means the specialty advanced materials
business of Chemco and its Subsidiaries, located on leased premises at the
Redstone Arsenal in Huntsville, Alabama, which consists of blood irradiation
detection films and other specialty imaging films and the manufacture of
carbonyl iron powders sold as iron supplements in our pharmaceutical business
and for metallurgical use in our performance chemicals business.

               "Mineral Granule Business" means the businesses operated by the
Chemco Group that involve the manufacture, sale and distribution of mineral
products consisting of ceramic-colored roofing granules, headlap roofing
granules and fines, including without limitation those manufacturing, sale and
distribution operations located at Annapolis, Missouri; Pembine, Wisconsin; and
Blue Ridge Summit, Pennsylvania.

               "Moody's" means Moody's Investors Service, Inc.

               "Mortgaged Properties" means, collectively, the Closing Date
Mortgaged Properties and the Post-closing Mortgaged Properties.

               "Multiemployer Plan" means a multiemployer plan as defined in
Section 4001(a)(3) of ERISA.

               "Net Available Proceeds" means:

               (I) in the case of any Disposition other than a Casualty Event or
an Excluded Disposition, and subject to clauses (III) and (IV) below, the
aggregate amount of all cash and cash-equivalent consideration received by or
paid at the direction of any member of the Chemco Group directly or indirectly
in connection with such Disposition; provided that:

               (a) Net Available Proceeds shall be net of (i) the amount of any
        legal, title, survey and recording fees and expenses and any transfer,
        documentary, stamp, intangibles, gains or other similar taxes,
        commissions and other fees and expenses paid by any member of the Chemco
        Group to Person that is not a member of the Chemco Group in connection
        with such Disposition and (ii) any Federal, state and local income or
        other taxes reserved in accordance with GAAP or actually paid by any
        member of the Chemco Group (without duplication of taxes described in
        clause (i) above) as a result of

                                Credit Agreement
<PAGE>
                                      -19-

        such Disposition either to the relevant Federal, state or local
        governmental authority or pursuant to the Tax Sharing Agreement
        to a direct or indirect parent of Chemco; and

               (b) Net Available Proceeds shall be net of any repayments by any
        member of the Chemco Group of Indebtedness, to the extent that (i) such
        Indebtedness is secured by a Lien on the property that is the subject of
        such Disposition and (ii) the transferee of (or holder of the Lien on)
        such property requires that such Indebtedness be repaid as a condition
        to the purchase of such property, provided that such Lien shall not have
        been created by any of the Security Documents;

               (II) in the case of any Casualty Event, and subject to clauses
(III) and (IV) below, the aggregate amount of proceeds of insurance,
condemnation awards and other compensation received by or paid at the direction
of any member of the Chemco Group in respect of such Casualty Event net of (i)
reasonable expenses incurred by any members of the Chemco Group in connection
therewith and (ii) contractually required repayments of Indebtedness to the
extent secured by a Lien on such property, other than for mandatory prepayments
required under Section 2.10, and any income and transfer taxes payable by any
members of the Chemco Group in respect of such Casualty Event;

               (III) in the case of a Disposition of all or a portion of the
Belleville Property or the Linden Property, an amount equal to the excess, if
any, of the aggregate amount of Net Available Proceeds as determined pursuant to
clause (I) or (II) above, as the case may be, with respect to such Disposition
and all prior Dispositions in respect of the Belleville Property and the Linden
Property over $20,000,000;

               (IV) in the case of a Disposition of all or a portion of ISP
FineTech, an amount equal to the excess, if any, of the aggregate amount of Net
Available Proceeds as determined pursuant to clause (I) or (II) above, as the
case may be, with respect to such Disposition and all prior Dispositions in
respect of ISP FineTech over $25,000,000;

               (V) in the case of any taxes reserved in accordance with GAAP as
provided by clause (I)(a)(ii) above, an amount equal to the excess, if any, of
the aggregate amount of such reserve over the aggregate amount of the taxes (for
which such reserve was established) that were actually paid by a member of the
Chemco Group to a Person outside of the Chemco Group (determined as of the date
that such reserve is dissolved (or should be dissolved) in accordance with
GAAP); and

               (VI) in the case of any Disposition that is an Excluded
Disposition, an amount equal to zero.

               "Note" means each promissory note issued by the Borrowers
pursuant to Section 2.09(g).

               "non-recourse" means, with respect to an obligation of any
Person, that (a) such obligation benefits from a Lien secured by, or other
preferential arrangement with respect to, certain property of such Person, (b)
such Person has no personal liability in respect of such obligation (provided
that an action or other legal proceeding may be commenced against such Person
for purposes described in clause (d) below), (c) the general assets of such
Person, other

                                Credit Agreement
<PAGE>
                                      -20-

than such certain property, may not be realized upon as a means of
enforcing payment or performance of such obligation, (d) the rights and remedies
of the holder of such obligation are limited to the enforcement of the Lien or
other preferential arrangement and realization of such certain property, (e)
such obligation is not Guaranteed by another Person and (f) if such Person is an
Unrestricted Entity, no default with respect to such obligation would permit,
upon notice, lapse of time or both, any holder of any other Indebtedness of an
Affiliate of such Person to declare a default on such other Indebtedness or
cause the payment of the Indebtedness to be accelerated or payable prior to its
stated maturity. The term "no recourse" shall be construed to have the same
meaning and effect as the defined term "non-recourse".

               "Obligor" means each of the Borrowers and the Subsidiary
Guarantors.

               "Other Taxes" means any and all present or future stamp or
documentary taxes or any other excise or property taxes, charges or similar
levies arising from the execution, delivery or enforcement of, or otherwise with
respect to, any Credit Document.

               "outstanding book value" (and any similar expression) means, at
any time, with respect to any equity Investment or Subsidiary designated as an
Unrestricted Entity (whether or not such Investment is outstanding at such time
or the designation of such Unrestricted Entity as such is withdrawn), an amount
equal to the excess, if any, of the book value of such Investment or
Unrestricted Entity (determined as of the date that such Investment is made or
such Subsidiary is effectively designated as an Unrestricted Entity) over the
sum (without duplication) of (a) cash sale proceeds of any Disposition of such
Investment or Unrestricted Entity received prior to such time by any Obligor
from any Person (other than a member of the Chemco Group), net of the aggregate
amount of all fees, expenses and other items described in clause (I)(a) of the
definition of "Net Available Proceeds" set forth in this Section, plus (b) cash
distributions constituting a return of capital, or otherwise not included in the
definition of "Net Income" set forth in Section 6.10, in each case in respect of
such Investment or Unrestricted Entity received prior to such time by any
Obligor from any Person (other than a member of the Chemco Group), plus (c) an
amount equal to 50% of all other cash distributions, including cash dividends,
in respect of such Investment or Unrestricted Entity received prior to such time
by any Obligor from any Person (other than a member of the Chemco Group), net of
the aggregate amount of all taxes, and amounts in respect of taxes, described in
clause (I)(b) of the definition of "Net Available Proceeds" set forth in this
Section that are attributable to such cash distributions plus (d) if the
designation of such Unrestricted Entity is withdrawn, the book value of such
Unrestricted Entity (determined as of the date that such Unrestricted Entity
effectively becomes a Subsidiary Guarantor).

               "Participant" has the meaning assigned to such term in Section
9.04(e).

               "PBGC" means the Pension Benefit Guaranty Corporation referred to
and defined in ERISA.

               "Permitted Liens" has the meaning assigned to such term in
Section 6.09.

               "Person" means any natural person, corporation, limited liability
company, trust, joint venture, association, company, partnership, Governmental
Authority or other entity.

                                Credit Agreement
<PAGE>
                                      -21-

               "Plan" means any employee pension benefit plan (other than a
Multiemployer Plan) subject to the provisions of Title IV of ERISA or Section
412 of the Code or Section 302 of ERISA, and in respect of which the Borrower or
any ERISA Affiliate is (or, if such plan were terminated, would under Section
4069 of ERISA be deemed to be) an "employer" as defined in Section 3(5) of
ERISA.

               "Pledge and Security Agreement" means the Pledge and Security
Agreement dated as of the date hereof between the Obligors and the
Administrative Agent.

               "Post-closing Mortgaged Property" has the meaning assigned to
such term in Section 4.17.

               "Prime Rate" means the rate of interest per annum publicly
announced from time to time by Chase as its prime rate in effect at its
principal office in New York City; each change in the Prime Rate shall be
effective from and including the date such change is publicly announced as being
effective.

               "Principal Payment Dates" means (a) each of the 20 consecutive
Quarterly Dates, commencing with the Quarterly Date occurring in September 2001,
(b) each of the Quarterly Dates occurring in December 2006, June 2007 and
December 2007 and (c) the Term Loan Maturity Date.

               "property" means any right or interest in or to property of any
kind whatsoever, whether real, personal or mixed and whether tangible or
intangible, including cash, securities, accounts and contract rights. The word
"asset" shall be construed to have the same meaning and effect as the defined
term "property".

               "Qualified ISP Debt" means any Indebtedness of any parent, direct
or indirect, of Chemco, including ISP, other than the ISP 2003 Notes, (a) that
bears market terms and conditions, including a market rate of interest, (b) with
an initial scheduled principal repayment date of at least one year and one day
beyond the Term Loan Maturity Date and (c) which is not guaranteed by any member
of the Chemco Group.

               "Qualified Securitization Program" means any financing
transaction (a) provided by one or more Persons, none of which is a Subsidiary
or an Affiliate of Chemco, (b) in an aggregate principal amount outstanding at
any time not exceeding $50,000,000, (c) in favor of ISP Funding, (d) secured by
the grant by ISP Funding of a security interest in (or a sale of) only accounts
receivable originated by any of the Obligors in connection with the sale or
lease of inventory or the rendering of services in the ordinary course of
business and the proceeds thereof and (e) for which no recourse to any member of
the Chemco Group may be made other than (i) in the case of any Obligor which
sells accounts receivable to ISP Funding in connection with the transaction and
ISP Funding, (A) repurchases of accounts receivable that do not qualify for
financing under terms of such transaction, (B) the amount of any dilutions in
respect of such accounts receivable and (C) customary indemnities for financing
transactions of such type and (ii) in the case solely of ISP Funding, such
accounts receivable and the proceeds thereof; provided that in any event no
recourse to any member of the Chemco Group shall be permitted to be made for any
credit related default or loss with respect to any account receivable.

                                Credit Agreement
<PAGE>
                                      -22-

               "Qualified Senior Subordinated Debt" means Indebtedness of the
Borrowers (a) contractually subordinated in right of payment to the Indebtedness
hereunder, (b) incurred and outstanding at any time when (1) no Indebtedness of
any direct or indirect parent of Chemco, including ISP, is outstanding
(determined as of the close of business on the day such Indebtedness is
incurred) or (2) only Qualified ISP Debt is outstanding, (c) subject to
definitive documentation, and on terms and conditions, substantially similar to
the Required Subordinated Debt Documents and the terms and conditions thereof,
as determined by the Administrative Agent, (d) the definition of "Senior Debt"
(or the like) therein shall cover principal, interest, fees, reimbursement
obligations and all other amounts owing hereunder, (e) the subordination
provisions of which shall apply, and the terms of which shall not permit any
redemption, repurchase, defeasance, retirement or other prepayment of such
Indebtedness, until the payment in full in cash of all amounts owing hereunder,
(f) the covenants, events of default and other terms therein shall be less
restrictive than those set forth herein, and shall not include any maintenance
financial covenants, (g) the holders of such Indebtedness shall be required to
give the Administrative Agent reasonable prior written notice of any
acceleration of such Indebtedness, (h) the initial scheduled principal repayment
date of such Indebtedness shall be at least one year and one day beyond the Term
Loan Maturity Date, (i) the interest rate applicable to such Indebtedness shall
be a market rate, (j) payments of principal of, interest on and all other
amounts owing with respect to such Indebtedness shall be prohibited in the event
of (1) acceleration of the maturity of the Loans hereunder, (2) the voluntary or
involuntary bankruptcy or insolvency of any of the Borrowers and the other
Subsidiaries and (3) subject to payment blockage provisions consistent with
market practice, a Default under clause (a) of Article VII, (k) assignments of
such Indebtedness shall be prohibited except subject to the subordination
provisions, (l) amounts received by any holder of such Indebtedness in
contravention of the subordination terms shall be held in trust and promptly
paid over to the Administrative Agent, (m) the terms and conditions of such
Indebtedness shall not be amended or otherwise modified without the consent of
the Required Lenders, (n) such Indebtedness shall not require the consent of any
holder thereof with respect to any amendment or other modification of any of the
Credit Documents and (o) the documentation shall contain other payment blockage
provisions that are consistent with market practice and an "X" clause.

               "Qualified Senior Subordinated Debt Documents" means,
collectively, each of the notes, agreements, instruments or other documents
evidencing or relating to the Qualified Senior Subordinated Debt.

               "Quarterly Dates" means the last Business Day of March, June,
September and December in each year, the first of which shall be the first such
day after the date hereof.

               "Register" has the meaning set forth in Section 9.04.

               "Related Parties" means, with respect to any specified Person,
such Person's Affiliates and the respective directors, officers, employees,
agents and advisors of such Person and such Person's Affiliates.

               "Release" means any release, spill, emission, leaking, pumping,
injection, deposit, disposal, discharge, dispersal, leaching or migration into
the indoor or outdoor environment, including the movement of Hazardous Materials
through ambient air, soil, surface water, ground water, wetlands, land or
subsurface strata.

                                Credit Agreement
<PAGE>
                                      -23-

               "Replaced Lender" has the meaning set forth in Section 2.18(b).

               "Replacement Event" means:

               (a)  with respect to any Lender or any Participant:

               (i) the failure or refusal by such Lender or Participant to agree
        to a request by the Lead Borrower or to amend or waive, or to grant any
        consent under, any provision of any Credit Document under circumstances
        when such amendment, waiver or consent requires the approval of all of
        the Lenders to be effective and (in the case of a Participant) the
        Lender from which such Participant acquired its participation (the
        "Originator") may not so agree without the consent of such Participant,
        such failure or refusal to be evidenced by:

               (A) the written objection by such Lender or Participant to any
               such request made to it by the Administrative Agent or (in the
               case of a Participant) the relevant Originator in writing
               describing such amendment, waiver or requested consent in
               principle;

               (B) the failure by such Lender or Participant to respond in
               writing to any such request so made to it on or before the 10th
               Business Day after it receives such request; or

               (C) the failure by such Lender or Participant to execute and
               deliver definitive documentation furnished to it by the
               Administrative Agent to effectuate any such amendment, waiver or
               consent on or before the 10th Business Day after it receives such
               documentation; or

               (ii) the request by such Lender or Participant for compensation
        under Section 2.14(a) or (b) or 2.16(c) or (in the case of a Lender) the
        suspension by such Lender of its obligation to make, and continue and
        convert ABR Loans into, Eurodollar Loans hereunder pursuant to Section
        2.13, unless such Lender or Participant shall have withdrawn such
        request or suspension, as the case may be before the replacement of such
        Lender under Section 2.18 or the repurchase of the participation of such
        Participant, as the case may be; and

               (b) with respect to any Lender, the appointment of, or the taking
of possession by, a receiver, custodian, conservator, trustee or liquidator of
such Lender, or the declaration by the appropriate regulatory authority that
such Lender is insolvent.

               "Required Lenders" means, at any time, Lenders having Revolving
Credit Exposures, unused Revolving Credit Commitments and Term Loans
representing more than 50% of the sum of the aggregate Revolving Credit
Exposures, the aggregate unused Revolving Credit Commitments and the aggregate
outstanding principal amount of the Term Loans at such time. The "Required
Lenders" of a particular Class of Loans means, at any time, Lenders having
Revolving Credit Exposures, outstanding Term Loans and unused Commitments of
such Class representing more than 50% of the sum of the aggregate Revolving
Credit Exposures, the

                                Credit Agreement
<PAGE>
                                      -24-

aggregate unused Revolving Credit Commitments and the aggregate outstanding
principal amount of the Term Loans of such Class at such time.

               "Required Senior Subordinated Debt" means the Indebtedness in
respect of the 10-1/4% Senior Subordinated Notes due 2011, jointly issued by the
Borrowers in an original aggregate principal amount equal to $205,000,000.

               "Required Senior Subordinated Debt Documents" means,
collectively, (a) the Indenture by and among the Borrowers, the Guarantors party
thereto and Wilmington Trust Company, as Trustee, (b) the notes evidencing the
Required Senior Subordinated Debt, (c) the Purchase Agreement by and among the
Borrowers, the Guarantors party thereto and the Purchasers party thereto and (d)
the Registration Rights Agreement by and among the Borrowers, the Guarantors
party thereto and the Purchasers party thereto, each dated the Effective Date,
and (e) each other note, agreement, instrument or other document evidencing or
relating to the Required Senior Subordinated Debt.

               "Restricted Payment" means, with respect to any Person: (a) any
dividend or other distribution (whether in cash, securities or other property)
with respect to any shares of any class of capital stock of such Person (whether
made by such Person or any of its Subsidiaries), or any payment (whether in
cash, securities or other property), including any sinking fund or similar
deposit, on account of the purchase, redemption, retirement, acquisition,
cancellation or termination of any such shares of capital stock of such Person
or any option, warrant or other right to acquire any such shares of capital
stock of such Person, excluding dividends or other distributions payable solely
in shares of common stock of such Person of the same class as the stock on which
such dividends or other distributions are payable (or, in each case, warrants or
other rights to purchase any such shares), and (b) Investments by such Person in
any other Person of which such first Person is a Subsidiary, excluding
Investments consisting of Indebtedness permitted under Section 6.06(h) or
Investments permitted by Section 6.07(d) (it being understood that the term
"Restricted Payment" shall not include payments by any member of the Chemco
Group pursuant to the terms of the Tax Sharing Agreement).

               "Restricted Subsidiary" means each member of the Chemco Group
other than the Borrowers.

               "Revolving Credit", when used in reference to any Loan or
Borrowing, refers to whether such Loan, or the Loans constituting such
Borrowing, are made pursuant to Section 2.01(a).

               "Revolving Credit Availability Period" means the period from and
including the Effective Date to but excluding the earlier of the Revolving
Credit Commitment Termination Date and the date of termination of the Revolving
Credit Commitments.

               "Revolving Credit Commitment" means, with respect to each
Revolving Credit Lender, the commitment of such Revolving Credit Lender to make
Revolving Credit Loans and to acquire participations in Letters of Credit and
Swingline Loans hereunder, expressed as an amount representing the maximum
aggregate amount of such Revolving Credit Lender's Revolving Credit Exposure
hereunder, as such commitment may be (a) reduced from time to time pursuant to
Section 2.08 or 2.10(b) and (b) reduced or increased from time to time pursuant

                                Credit Agreement
<PAGE>
                                      -25-

to assignments by or to such Lender pursuant to Section 9.04. The initial amount
of each Revolving Credit Lender's Revolving Credit Commitment is set forth on
Schedule I, or in the Assignment and Acceptance pursuant to which such Lender
shall have assumed its Revolving Credit Commitment, as applicable. The initial
aggregate amount of the Revolving Credit Lenders' Revolving Credit Commitments
is $225,000,000.

               "Revolving Credit Commitment Termination Date" means the fifth
anniversary of the date hereof, provided that, if such anniversary is not a
Business Day, the Revolving Credit Commitment Termination Date shall be the
immediately preceding Business Day.

               "Revolving Credit Exposure" means, with respect to any Revolving
Credit Lender at any time, the sum of (i) the aggregate outstanding principal
amount of Revolving Credit Loans, (ii) the LC Exposure and (iii) the Swingline
Exposure of such Revolving Credit Lender at such time.

               "Revolving Credit Lender" means a Lender with a Revolving Credit
Commitment or, if the Revolving Credit Commitments have terminated or expired, a
Lender with Revolving Credit Exposure.

               "Secured Obligations" has the meaning assigned to such term in
Section 1 of the Pledge and Security Agreement.

               "Security Document" means, collectively, the Pledge and Security
Agreement and each security agreement, pledge agreement, collateral assignment
(including any copyright, patent and trademark assignment), memorandum of
security interest or assignment, mortgage, leasehold mortgage, deed of trust,
assignment of rents, account control agreement, financing statement, fixture
filing and other recording, registration, filing or instrument that creates,
evidences or otherwise relates to any Lien created (or purported to be created)
by any Obligor in favor of the Administrative Agent.

               "Senior Officer" means, with respect to any Obligor, the chief
executive officer, the president or any senior vice president of such Obligor.

               "SJH" means, individually and collectively, as applicable, (a)
Samuel J. Heyman, (b) any member of his immediate family and (c) each Person
that is (i) Controlled by any combination of Samuel J. Heyman and the members of
his immediate family and (ii) in which Samuel J. Heyman and/or any of the
members of his immediate family hold at least 80% of the Voting Stock or other
equity or beneficial interests.

               "Special Acquisition Debt" means Indebtedness that is (a) assumed
by any Obligor in connection with an acquisition by such Obligor of all or a
substantial portion of the assets of another Person, (b) not incurred by such
Obligor or any other Person in contemplation of (or in connection with) such
transaction, except for the assumption thereof as provided in clause (a) above,
and (c) economically more advantageous to such Obligor (or the Chemco
Consolidated Group taken as a whole) than a Revolving Credit Eurodollar Loan
(whether or not such a Revolving Credit Loan is available hereunder).

                                Credit Agreement
<PAGE>
                                      -26-

               "Special Borrowing" means a Syndicated Revolving Credit Borrowing
the proceeds of which are to be used solely to finance one or more acquisitions
or for Capital Expenditures of any of the members of Chemco Group, to pay a
liability arising in connection with a Disposition (to the extent that a reserve
for such liability had been established at the time of such Disposition) or to
prepay Term Loans.

               "Special Capital Balance" means, on any date, the aggregate
amount of all Special Capital Contributions made during the 30-day period ending
on such date minus the aggregate amount of all Restricted Payments made pursuant
to Section 6.10(d) during such period.

               "Special Capital Contribution" means an Investment made in cash
after the Effective Date in the capital stock of Chemco by any Person that is
not a member of the Chemco Group and that is designated as a "special capital
contribution" by the Lead Borrower to the Administrative Agent at the time such
Investment is made.

               "Specialty Chemicals Business" means the businesses operated by
the Chemco Group, including the manufacture, sale and distribution of specialty
chemicals, including products currently derived from acetylene, but excluding
the Mineral Granule Business and the Materials Business.

               "Special Collateral Release" means, subject to the terms and
conditions set forth herein, a release to the Borrowers of Collateral in the
form of cash from the Collateral Account, the proceeds of which release are to
be used solely to finance one or more acquisitions or for Capital Expenditures,
to pay a liability arising in connection with a Disposition (to the extent that
a reserve for such liability had been established at the time of such
Disposition) or to prepay Loans and/or provide cover for LC Exposure.

               "Special Collateral Release Request" means a request by the Lead
Borrower for a release of cash Collateral from the Collateral Account in
accordance with Section 2.20.

               "Special Reserve Amount" has the meaning assigned to such term in
Section 2.10(b)(iii).

               "Standard & Poor's" means Standard & Poor's Ratings Services, a
division of The McGraw-Hill Companies, Inc.

               "Statutory Reserve Rate" means, for the Interest Period for any
Eurodollar Borrowing, a fraction (expressed as a decimal), the numerator of
which is the number one and the denominator of which is the number one minus the
arithmetic mean, taken over each day in such Interest Period, of the aggregate
of the maximum reserve percentages (including any marginal, special, emergency
or supplemental reserves) expressed as a decimal established by the Board to
which the Administrative Agent is subject for eurocurrency funding (currently
referred to as "Eurocurrency liabilities" in Regulation D of the Board). Such
reserve percentages shall include those imposed pursuant to such Regulation D.
Eurodollar Loans shall be deemed to constitute eurocurrency funding and to be
subject to such reserve requirements without benefit of or credit for proration,
exemptions or offsets that may be available from time to time to any Lender
under such Regulation D or any comparable regulation. The Statutory Reserve Rate
shall

                                Credit Agreement
<PAGE>
                                      -27-

be adjusted automatically on and as of the effective date of any change in any
reserve percentage.

               "Subsidiary" means, with respect to any Person: (a) any other
Person of which at least a majority of the Voting Stock is at the time directly
or indirectly owned or controlled by such first Person or one or more of its
Subsidiaries or by such first Person and one or more of its Subsidiaries; or (b)
that is otherwise Controlled by the parent or one or more subsidiaries of the
parent or by the parent and one or more subsidiaries of the parent. Unless
otherwise specified, "Subsidiary" means a Subsidiary of Chemco.

               "Subsidiary Guarantor" means each of the Subsidiaries of Chemco
identified under the caption "SUBSIDIARY GUARANTORS" on the signature pages
hereto and each Subsidiary of Chemco that becomes a "Subsidiary Guarantor" after
the date hereof pursuant to Section 6.16(a).

               "Swingline Exposure" means, at any time, the aggregate principal
amount of all Swingline Loans outstanding at such time. The Swingline Exposure
of any Lender at any time shall be its Applicable Percentage of the total
Swingline Exposure at such time.

               "Swingline Lender" means Chase, in its capacity as lender of
Swingline Loans hereunder.

               "Swingline Loan" means a Loan made pursuant to Section 2.04.

               "Syndicated", when used in reference to any Loan or Borrowing,
refers to whether the Class of such Loan or Borrowing is Revolving Credit or
Term, as opposed to Swingline.

               "Tax Sharing Agreement" means the Tax Sharing Agreement made as
of the 1st of January, 2001 by and among ISP, Newco Holdings Inc., a Delaware
corporation, and Chemco.

               "Taxes" means any and all present or future taxes, levies,
imposts, duties, deductions, charges or withholdings imposed by any Governmental
Authority.

               "Temporary Commitment Reduction Amount" has the meaning assigned
to such term in Section 2.10(b)(i).

               "Term", when used in reference to any Loan or Borrowing, refers
to whether such Loan, or the Loans constituting such Borrowing, are made
pursuant to Section 2.01(b).

               "Term Loan Commitment" means, with respect to each Term Loan
Lender, the commitment of such Term Loan Lender to make one or more Term Loans
hereunder on the Effective Date, expressed as an amount representing the maximum
aggregate principal amount of the Term Loans to be made by such Term Loan Lender
hereunder, as such commitment may be (a) reduced from time to time pursuant to
Section 2.08 or 2.10(b) and (b) reduced or increased from time to time pursuant
to assignments by or to such Lender pursuant to Section 9.04. The initial amount
of each Term Loan Lender's Term Loan Commitment is set forth on Schedule I, or
in the Assignment and Acceptance pursuant to which such Lender shall have
assumed its Term

                                Credit Agreement
<PAGE>
                                      -28-

Loan Commitment, as applicable. The initial aggregate amount of the Term Loan
Lenders' Term Loan Commitments is $225,000,000.

               "Term Loan Lender" means a Lender with a Term Loan Commitment or
an outstanding Term Loan.

               "Term Loan Maturity Date" means the seventh anniversary of the
date hereof, provided that, if such anniversary is not a Business Day, the Term
Loan Maturity Date shall be the immediately preceding Business Day.

               "Title Company" means Chicago Title Insurance Company.

               "Total Consolidated Indebtedness" means, at any date, the sum of
all Indebtedness of the Chemco Consolidated Group determined on a consolidated
basis in accordance with GAAP on such date.

               "Total Consolidated Senior Indebtedness" means, at any date, the
sum of all Indebtedness of the Chemco Consolidated Group that is not
contractually subordinated to any other Indebtedness of the Chemco Consolidated
Group (whether or not any Lien secures such Indebtedness) determined on a
consolidated basis in accordance with GAAP on such date.

               "Total Debt Leverage Maintenance Ratio" means, as of any
Determination Date, the ratio of (i) Total Consolidated Indebtedness as of such
Determination Date to (ii) EBITDA for the period of four consecutive Fiscal
Quarters ending on, or most recently ended prior to, such Determination Date.

               "Transactions" means the execution, delivery and performance by
each Obligor of this Agreement and the other Credit Documents to which such
Obligor is intended to be a party, the borrowing of Loans, the use of the
proceeds thereof and the issuance and continuance of Letters of Credit
hereunder.

               "Type", when used in reference to any Loan or Borrowing, refers
to whether the rate of interest on such Loan, or on the Loans constituting such
Borrowing, is determined by reference to the Adjusted LIBO Rate or the Alternate
Base Rate.

               "Unrestricted Entity" means any Subsidiary of Chemco, or any
Affiliate of Chemco in which any member of the Chemco Group holds an Investment,
that (a) is designated as an "unrestricted entity" in a writing delivered by the
Lead Borrower to the Administrative Agent in accordance with Section 6.16(e),
(b) is not capitalized at any time by any Investment by any member of the Chemco
Group, except to the extent permitted pursuant to Section 6.07(e), (c) has no
Indebtedness guaranteed by any member of the Chemco Group, (d) has no
Indebtedness other than non-recourse Indebtedness and (e) has at least one
director on its board of directors (or similar governing board) that is not a
director of any member of the Chemco Group. In addition, each of the
Subsidiaries of Chemco listed on Schedule VIII shall, as of the Effective Date,
be deemed designated as, and be, an Unrestricted Entity.

               "Voting Stock" means, with reference to any Person, stock of any
class or classes (or equivalent interests), the holders of which are ordinarily,
in the absence of contingencies,

                                Credit Agreement
<PAGE>
                                      -29-

entitled to vote for the election of the directors (or Persons performing
similar functions) of such Person, even though the right so to vote has been
suspended by the happening of such a contingency.

               "Withdrawal Liability" means liability to a Multiemployer Plan as
a result of a complete or partial withdrawal from such Multiemployer Plan, as
such terms are defined in Part I of Subtitle E of Title IV of ERISA.

               Section 1.02. Classification of Loans and Borrowings. For
purposes of this Agreement, Loans may be classified and referred to by Class
(e.g., a "Syndicated Loan"), by Type (e.g., an "ABR Loan") or by Class and Type
(e.g., a "Syndicated ABR Loan"). Borrowings also may be classified and referred
to by Class (e.g., a "Syndicated Borrowing"), by Type (e.g., an "ABR Borrowing")
or by Class and Type (e.g., a "Syndicated ABR Borrowing").

               Section 1.03. Terms Generally. The definitions of terms herein
shall apply equally to the singular and plural forms of the terms defined.
Whenever the context may require, any pronoun shall include the corresponding
masculine, feminine and neuter forms. The words "include", "includes" and
"including" shall be deemed to be followed by the phrase "without limitation".
The word "will" shall be construed to have the same meaning and effect as the
word "shall". The term "date hereof" refers to the date of this Agreement first
above written. Unless the context requires otherwise (a) any definition of or
reference to any agreement, instrument or other document herein shall be
construed as referring to such agreement, instrument or other document as from
time to time amended, restated, supplemented or otherwise modified (subject to
any restrictions on such amendments, restatements, supplements or modifications
set forth therein or herein, including Section 6.17), (b) references to any law,
constitution, statute, treaty, regulation, rule or ordinance (each a "law")
refer to that law as amended from time to time and include any successor law,
(c) any reference herein to any Person shall be construed to include such
Person's successors and permitted assigns, (d) the words "herein", "hereof" and
"hereunder", and words of similar import, shall be construed to refer to this
Agreement in its entirety and not to any particular provision hereof and (e) all
references herein to Articles, Sections, Exhibits and Schedules shall be
construed to refer to Articles and Sections of, and Exhibits and Schedules to,
this Agreement.

               Section 1.04. Accounting Terms; GAAP.

               (a) Except as otherwise expressly provided herein, all accounting
terms used herein shall be interpreted, and all financial statements and
certificates and reports as to financial matters required to be delivered to the
Lenders and/or the Administrative Agent hereunder shall (unless otherwise
disclosed to the Lenders in writing at the time of delivery thereof in the
manner described in subsection (b) below) be prepared, in accordance with GAAP
applied on a basis consistent with those used in the preparation of the latest
audited financial statements furnished to the Lenders after the date hereof
under Section 6.01 (or, before the first such financial statements are so
furnished, those used in the preparation of the financial statements referred to
in Section 4.02). All calculations made for the purposes of determining
compliance with the terms of Article VI shall (except as otherwise expressly
provided herein) be made by application of GAAP applied on a basis consistent
with those used in the preparation of the annual or quarterly financial
statements furnished to the Lenders pursuant to Section 6.01 (or, before the
first such financial statements are so furnished, those used in the preparation
of the financial

                                Credit Agreement
<PAGE>
                                      -30-

statements referred to in Section 4.02) unless (i) the Lead Borrower shall have
notified the Administrative Agent of its objection to determining such
compliance on such basis at the time of delivery of such financial statements or
(ii) the Required Lenders shall notify the Administrative Agent of their
objection within 30 days after delivery of such financial statements, in either
of which events such calculations shall be made on a basis consistent with those
used in the preparation of the latest financial statements as to which such
objection shall not have been made (which, if objection is made in respect of
the first financial statements delivered under Section 6.01, shall mean the
financial statements referred to in Section 4.02).

               (b) The Lead Borrower shall deliver to the Lenders, at the same
time as the delivery of any annual or quarterly financial statement under
Section 6.01, (i) a description in reasonable detail of any material variation
between the application of accounting principles employed in the preparation of
such statement and the application of accounting principles employed in the
preparation of the next preceding annual or quarterly financial statements as to
which no objection has been made in accordance with the last sentence of
subsection (a) above and (ii) reasonable estimates of the difference between
such statements arising as a consequence thereof.

               (c) To enable the ready and consistent determination of
compliance with the covenants set forth in Article VI, among other things, the
Borrowers will not, and will cause the members of the Chemco Consolidated Group
not to, (i) change the last day of their respective Fiscal Years from December
31 or (ii) permit any Fiscal Quarter to be greater than 98 days.

               (d) Except as otherwise expressly provided herein, all financial
statements and certificates and reports as to financial matters required to be
delivered to the Lenders and/or the Administrative Agent hereunder shall be
prepared, and all calculations made for purposes of determining compliance with
the terms hereof shall be made, as if the Unrestricted Entities were carried as
equity investments by the relevant members of the Chemco Group; provided that:
(i) earnings and other increases in the value of Unrestricted Entities shall not
increase earnings of members of the Chemco Consolidated Group until received by
a member of the Chemco Consolidated Group in cash, Cash Equivalents or publicly
traded securities; (ii) the value of equity investments in any Unrestricted
Entity shall not be increased from such value thereof at the date of such
Unrestricted Entity's designation as such, except to reflect the book value of
any assets subsequently contributed thereto by members of the Chemco
Consolidated Group, such book value in the case of any asset to be determined as
of the date of its contribution; and (iii) losses and other decreases of value
of the Unrestricted Entities, when recognized by the respective Unrestricted
Entities, shall, at the time of such recognition, decrease the value of equity
investments in Unrestricted Entities held by members of the Chemco Consolidated
Group, but shall not decrease the earnings of members of the Chemco Consolidated
Group for purposes of determining EBITDA.

               (e) Except as otherwise expressly provided herein, all financial
statements and certificates and reports as to financial matters required to be
delivered to the Lenders and/or the Administrative Agent hereunder shall be
prepared, and all calculations made for purposes of determining compliance with
the terms hereof shall be made after giving pro forma effect to the Chemco
Restructuring as if such Chemco Restructuring occurred as of January 1, 2001.

                                Credit Agreement
<PAGE>
                                      -31-

               (f) All financial statements and certificates and reports as to
financial matters required to be delivered to the Lenders and/or the
Administrative Agent hereunder shall be prepared, and all calculations made for
purposes of determining compliance with the terms hereof shall be made,
excluding any one time effect of the adoption of the Proposed Statement of
Financial Accounting Standards of the Financial Accounting Standards Board
entitled "Business Combinations and Intangible Assets - Accounting for
Goodwill".

                                   ARTICLE II

                                   THE CREDITS

               Section 2.01. The Commitments.

               (a) Revolving Credit Loans. Subject to the terms and conditions
set forth herein, each Revolving Credit Lender agrees to make Revolving Credit
Loans to the Borrowers from time to time during the Revolving Credit
Availability Period in an aggregate principal amount that will not result in (i)
such Lender's Revolving Credit Exposure exceeding such Lender's Revolving Credit
Commitment or (ii) the total Revolving Credit Exposures exceeding the total
Revolving Credit Commitments. Within the foregoing limits and subject to the
terms and conditions set forth herein, the Borrowers may borrow, prepay and
reborrow Revolving Credit Loans.

               (b) Term Loans. Subject to the terms and conditions set forth
herein, each Term Loan Lender agrees to make one or more Term Loans to the
Borrowers on the Effective Date in a principal amount not exceeding its Term
Loan Commitment. Amounts prepaid or repaid in respect of Term Loans may not be
reborrowed.

               Section 2.02. Loans and Borrowings.

               (a) Obligations of Lenders. Each Syndicated Loan shall be made as
part of a Borrowing consisting of Loans of the same Class and Type made by the
Lenders ratably in accordance with their respective Commitments of the
applicable Class. The failure of any Lender to make any Loan required to be made
by it shall not relieve any other Lender of its obligations hereunder; provided
that the Commitments of the Lenders are several and no Lender shall be
responsible for any other Lender's failure to make Loans as required.

               (b) Type of Loans. Subject to Section 2.13, each Syndicated
Borrowing shall be constituted entirely of ABR Loans or of Eurodollar Loans as
the Lead Borrower may request in accordance herewith. Each Swingline Loan shall
be an ABR Loan. Each Lender at its option may make any Eurodollar Loan by
causing any domestic or foreign branch or Affiliate of such Lender to make such
Loan; provided that any exercise of such option shall not affect the obligation
of the Borrowers to repay such Loan in accordance with the terms of this
Agreement.

               (c) Minimum Amounts; Limitation on Number of Borrowings. Each
Eurodollar Borrowing shall be in an aggregate amount of $5,000,000 or a larger
multiple of $1,000,000. Each Syndicated ABR Borrowing shall be in an aggregate
amount equal to $1,000,000 or a larger multiple of $1,000,000; provided that a
Syndicated ABR Borrowing may be in an

                                Credit Agreement
<PAGE>
                                      -32-

aggregate amount that is equal to the entire unused balance of the total
Commitments of the applicable Class. Each Swingline Loan shall be in an amount
equal to $250,000 or a larger multiple of $100,000. Borrowings of more than one
Class and Type may be outstanding at the same time; provided that there shall
not at any time be more than a total of twelve Eurodollar Borrowings
outstanding.

               (d) Limitations on Interest Periods. Notwithstanding any other
provision of this Agreement, the Lead Borrower shall not be entitled to request
(or to elect to convert to or continue as a Eurodollar Borrowing): (i) any
Revolving Credit Borrowing if the Interest Period requested therefor would end
after the Revolving Credit Commitment Termination Date; (ii) any Term Borrowing
if the Interest Period requested therefor would end after the Term Loan Maturity
Date; or (iii) any Term Borrowing if the Interest Period requested therefor
would commence before and end after any Principal Payment Date unless, after
giving effect thereto, the aggregate principal amount of the Term Loans having
Interest Periods that end after such Principal Payment Date shall be equal to or
less than the aggregate principal amount of the Term Loans permitted to be
outstanding after giving effect to the payments of principal required to be made
on such Principal Payment Date.

               Section 2.03. Requests for Syndicated Borrowings.

               (a) Notice by the Lead Borrower. To request a Syndicated
Borrowing, the Lead Borrower shall notify the Administrative Agent of such
request by telephone (i) in the case of a Eurodollar Borrowing, not later than
10:00 a.m., New York City time, three Business Days before the date of the
proposed Borrowing or (ii) in the case of a Syndicated ABR Borrowing, not later
than 1:00 p.m., New York City time, on the date of the proposed Borrowing. Each
such telephonic Borrowing Request shall be irrevocable and shall be confirmed
promptly by hand delivery or telecopy to the Administrative Agent of a written
Borrowing Request in a form approved by the Administrative Agent and signed by
the Lead Borrower.

               (b) Content of Borrowing Requests. Each telephonic and written
Borrowing Request shall specify the following information in compliance with
Section 2.02:

               (i) whether the requested Borrowing is to be a Revolving Credit
        Borrowing or Term Borrowing;

               (ii) the aggregate amount of the requested Borrowing;

               (iii) the date of such Borrowing, which shall be a Business Day;

               (iv) whether such Borrowing is to be an ABR Borrowing or a
        Eurodollar Borrowing;

               (v) whether or not such Borrowing is a Special Borrowing,
        provided that the Borrowers shall not request a Special Borrowing that
        will reinstate the Revolving Credit Commitments that had been reduced in
        connection with a Disposition unless on or prior to the proposed date of
        Borrowing the entire Special Reserve Amount, if any, that shall have
        been deposited to the Collateral Account in connection with such
        Disposition shall have been released pursuant to Sections 2.20 and 5.03;

                                Credit Agreement
<PAGE>
                                      -33-

               (vi) in the case of a Eurodollar Borrowing, the Interest Period
        therefor, which shall be a period contemplated by the definition of the
        term "Interest Period" and permitted under Section 2.02(d); and

               (vii) the location and number of the Borrowers' account to which
        funds are to be disbursed, which shall comply with the requirements of
        Section 2.06.

               (c) Notice by the Administrative Agent to the Lenders. Promptly
following receipt of a Borrowing Request in accordance with this Section, the
Administrative Agent shall advise each Lender of the details thereof and of the
amount of such Lender's Loan to be made as part of the requested Borrowing.

               (d) Failure to Elect. If no election as to the Type of a
Syndicated Borrowing is specified, then the requested Borrowing shall be an ABR
Borrowing. If no Interest Period is specified with respect to any requested
Eurodollar Borrowing, then the requested Borrowing shall be made instead as a
Syndicated ABR Borrowing.

               Section 2.04. Swingline Loans.

               (a) Agreement to Make Swingline Loans. Subject to the terms and
conditions set forth herein, the Swingline Lender agrees to make Swingline Loans
to the Borrowers from time to time during the Revolving Credit Availability
Period in an aggregate principal amount at any one time outstanding that will
not result in (i) the aggregate principal amount of outstanding Swingline Loans
exceeding $5,000,000 or (ii) the total Revolving Credit Exposures exceeding the
total Revolving Credit Commitments; provided that the Swingline Lender shall not
be required to make a Swingline Loan to refinance an outstanding Swingline Loan.
Within the foregoing limits and subject to the terms and conditions set forth
herein, the Borrowers may borrow, prepay and reborrow Swingline Loans.

               (b) Notice of Swingline Loans by the Lead Borrower. To request a
Swingline Loan, the Lead Borrower shall notify the Administrative Agent of such
request by telephone (confirmed by telecopy), not earlier than noon, and not
later than 4:00 p.m., New York City time, on the day of a proposed Swingline
Loan. Each such notice shall be irrevocable and shall specify the requested date
(which shall be a Business Day) and amount of the requested Swingline Loan. The
Administrative Agent will promptly advise the Swingline Lender of any such
notice received from the Lead Borrower. The Swingline Lender shall make each
Swingline Loan available to the Borrowers by means of a credit to the general
deposit account of the Borrowers with the Swingline Lender by 4:30 p.m., New
York City time, on the requested date of such Swingline Loan.

               (c) Participations by Lenders in Swingline Loans. The Swingline
Lender may by written notice given to the Administrative Agent not later than
10:00 a.m., New York City time, on any Business Day require the Lenders to
acquire participations on such Business Day in all or a portion of the Swingline
Loans outstanding. Such notice to the Administrative Agent shall specify the
aggregate amount of Swingline Loans in which Lenders will participate. Promptly
upon receipt of such notice, the Administrative Agent will give notice thereof
to each Lender, specifying in such notice such Lender's Applicable Percentage of
such Swingline Loan or Loans.

                                Credit Agreement
<PAGE>
                                      -34-

Each Lender hereby absolutely and unconditionally agrees, upon receipt of notice
as provided above in this paragraph, to pay to the Administrative Agent, for
account of the Swingline Lender, such Lender's Applicable Percentage of such
Swingline Loan or Loans. Each Lender acknowledges and agrees that its obligation
to acquire participations in Swingline Loans pursuant to this paragraph is
absolute and unconditional and shall not be affected by any circumstance
whatsoever, including the occurrence and continuance of a Default or reduction
or termination of the Commitments, and that each such payment shall be made
without any offset, abatement, withholding or reduction whatsoever. Each Lender
shall comply with its obligation under this paragraph by wire transfer of
immediately available funds, in the same manner as provided in Section 2.06 with
respect to Loans made by such Lender (and Section 2.06 shall apply, mutatis
mutandis, to the payment obligations of the Lenders), and the Administrative
Agent shall promptly pay to the Swingline Lender the amounts so received by it
from the Lenders. The Administrative Agent shall notify the Lead Borrower of any
participations in any Swingline Loan acquired pursuant to this paragraph, and
thereafter payments in respect of such Swingline Loan shall be made to the
Administrative Agent and not to the Swingline Lender. Any amounts received by
the Swingline Lender from the Borrowers (or other party on behalf of the
Borrowers) in respect of a Swingline Loan after receipt by the Swingline Lender
of the proceeds of a sale of participations therein shall be promptly remitted
to the Administrative Agent; any such amounts received by the Administrative
Agent shall be promptly remitted by the Administrative Agent to the Lenders that
shall have made their payments pursuant to this paragraph and to the Swingline
Lender, as their interests may appear. The purchase of participations in a
Swingline Loan pursuant to this paragraph shall not relieve the Borrowers of any
default in the payment thereof. Notwithstanding the foregoing, a Lender shall
not have any obligation to acquire a participation in a Swingline Loan pursuant
to this paragraph if a Default shall have occurred and be continuing at the time
such Swingline Loan was made and such Lender shall have notified the Swingline
Lender in writing, at least one Business Day prior to the time such Swingline
Loan was made, that such Default has occurred and that such Lender will not
acquire participations in Swingline Loans made while such Default is continuing.

               Section 2.05. Letters of Credit.

               (a) General. Subject to the terms and conditions set forth
herein, in addition to the Loans provided for in Section 2.01, the Lead Borrower
may request the LC Bank to issue, at any time and from time to time during the
Revolving Credit Availability Period and in such form as is acceptable to the LC
Bank in its reasonable determination, Letters of Credit for account of any
members of the Chemco Consolidated Group or any Affiliates of Chemco, provided
that any such Person that is not an Obligor shall have duly entered into with
the Borrowers and LC Bank, and delivered to the Administrative Agent, an LC
Reimbursement Agreement. Letters of Credit issued hereunder shall constitute
utilization of the Revolving Credit Commitments.

               (b) Notice of Issuance, Amendment, Renewal or Extension. To
request the issuance of a Letter of Credit (or the amendment, renewal or
extension of an outstanding Letter of Credit), the Lead Borrower shall hand
deliver or telecopy (or transmit by electronic communication, if arrangements
for doing so have been approved by the LC Bank) to the LC Bank and the
Administrative Agent (no less than three Business Days prior to the requested
date of issuance, amendment, renewal or extension or such shorter notice period
to which the LC Bank shall consent in respect to any particular issuance,
amendment, renewal or extension) a notice requesting the issuance of a Letter of
Credit, or identifying the Letter of Credit to be

                                Credit Agreement
<PAGE>
                                      -35-

amended, renewed or extended, and specifying the date of issuance, amendment,
renewal or extension (which shall be a Business Day), the date on which such
Letter of Credit is to expire (which shall comply with paragraph (d) of this
Section), the amount of such Letter of Credit, the name and address of the
beneficiary thereof and such other information as shall be necessary to prepare,
amend, renew or extend such Letter of Credit. If requested by the LC Bank, an
Obligor and/or other Person for account of which a Letter of Credit shall be
issued shall submit a letter of credit application on the LC Bank's standard
form in connection with any request for a Letter of Credit. In the event of any
inconsistency between the terms and conditions of this Agreement and the terms
and conditions of any form of letter of credit application or other agreement
submitted by the Lead Borrower to, or entered into by the Borrowers with, the LC
Bank relating to any Letter of Credit, the terms and conditions of this
Agreement shall control.

               (c) Limitations on Amounts. A Letter of Credit shall be issued,
amended, renewed or extended only if (and upon issuance, amendment, renewal or
extension of each Letter of Credit the Borrowers shall be deemed to represent
and warrant that), after giving effect to such issuance, amendment, renewal or
extension (i) the aggregate LC Exposure of the LC Bank (determined for these
purposes without giving effect to the participations therein of the Revolving
Credit Lenders pursuant to paragraph (e) of this Section) shall not exceed
$50,000,000 and (ii) the total Revolving Credit Exposures shall not exceed the
total Revolving Credit Commitments.

               (d) Expiration Date. Each Letter of Credit shall expire at or
prior to the close of business on the earlier of (i) the date twelve months
after the date of the issuance of such Letter of Credit (or, in the case of any
renewal or extension thereof, twelve months after the then-current expiration
date of such Letter of Credit, so long as such renewal or extension occurs
within three months of such then-current expiration date) and (ii) the date that
is five Business Days prior to the Revolving Credit Commitment Termination Date.

               (e) Participations. By the issuance of a Letter of Credit (or an
amendment to a Letter of Credit increasing the amount thereof) by the LC Bank,
and without any further action on the part of the LC Bank or the Lenders, the LC
Bank hereby grants to each Lender, and each Lender hereby acquires from the LC
Bank, a participation in such Letter of Credit equal to such Lender's Applicable
Percentage of the aggregate amount available to be drawn under such Letter of
Credit. Each Lender acknowledges and agrees that its obligation to acquire
participations pursuant to this paragraph in respect of Letters of Credit is
absolute and unconditional and shall not be affected by any circumstance
whatsoever, including any amendment, renewal or extension of any Letter of
Credit or the occurrence and continuance of a Default or reduction or
termination of the Commitments.

               In consideration and in furtherance of the foregoing, each Lender
hereby absolutely and unconditionally agrees to pay to the Administrative Agent,
for account of the LC Bank, such Lender's Applicable Percentage of each LC
Disbursement made by the LC Bank promptly upon the request of the LC Bank at any
time from the time of such LC Disbursement until such LC Disbursement is
reimbursed by the Borrowers or at any time after any reimbursement payment is
required to be refunded to the Borrowers for any reason. Such payment shall be
made without any offset, abatement, withholding or reduction whatsoever. Each
such payment shall be made in the same manner as provided in Section 2.06 with
respect to Loans made by such Lender (and Section 2.06 shall apply, mutatis
mutandis, to the payment

                                Credit Agreement
<PAGE>
                                      -36-

obligations of the Lenders), and the Administrative Agent shall promptly pay to
the LC Bank the amounts so received by it from the Lenders. Promptly following
receipt by the Administrative Agent of any payment from the Borrowers pursuant
to the next following paragraph, the Administrative Agent shall distribute such
payment to the LC Bank or, to the extent that the Lenders have made payments
pursuant to this paragraph to reimburse the LC Bank, then to such Lenders and
the LC Bank as their interests may appear. Any payment made by a Lender pursuant
to this paragraph to reimburse the LC Bank for any LC Disbursement shall not
constitute a Loan and shall not relieve the Borrowers of their obligation to
reimburse such LC Disbursement.

               (f) Reimbursement. If the LC Bank shall make any LC Disbursement
in respect of a Letter of Credit, the Borrowers shall reimburse the LC Bank in
respect of such LC Disbursement by paying to the Administrative Agent an amount
equal to such LC Disbursement not later than 2:00 p.m., New York City time, on
(i) the Business Day that the Lead Borrower receives notice of such LC
Disbursement, if such notice is received prior to 10:00 a.m., New York City
time, or (ii) the Business Day immediately following the day that the Lead
Borrower receives such notice, if such notice is not received prior to such
time.

               If the Borrowers fail to make such payment when due, the
Administrative Agent shall notify each Revolving Credit Lender of the applicable
LC Disbursement, the payment then due from the Borrowers in respect thereof and
such Lender's Applicable Percentage thereof.

               (g) Obligations Absolute. The Borrowers' obligation to reimburse
LC Disbursements as provided in paragraph (f) of this Section shall be absolute,
unconditional and irrevocable, and shall be performed strictly in accordance
with the terms of this Agreement under any and all circumstances whatsoever and
irrespective of (i) any lack of validity or enforceability of any Letter of
Credit, or any term or provision therein, (ii) any draft or other document
presented under a Letter of Credit proving to be forged, fraudulent or invalid
in any respect or any statement therein being untrue or inaccurate in any
respect, (iii) payment by the LC Bank under a Letter of Credit against
presentation of a draft or other document that does not comply strictly with the
terms of such Letter of Credit and (iv) any other event or circumstance
whatsoever, whether or not similar to any of the foregoing, that might, but for
the provisions of this Section, constitute a legal or equitable discharge of the
Borrowers' obligations hereunder.

               Neither the Administrative Agent, the Lenders nor the LC Bank,
nor any of their Related Parties, shall have any liability or responsibility by
reason of or in connection with the issuance or transfer of any Letter of Credit
by the LC Bank or any payment or failure to make any payment thereunder
(irrespective of any of the circumstances referred to in the preceding
sentence), or any error, omission, interruption, loss or delay in transmission
or delivery of any draft, notice or other communication under or relating to any
Letter of Credit (including any document required to make a drawing thereunder),
any error in interpretation of technical terms or any consequence arising from
causes beyond the control of the LC Bank; provided that the foregoing shall not
be construed to excuse the LC Bank from liability to the Borrowers to the extent
of any direct damages (as opposed to consequential damages, claims in respect of
which are hereby waived by the Borrowers to the extent permitted by applicable
law) suffered by the Borrowers that are caused by the LC Bank's gross negligence
or willful misconduct when determining whether drafts and other documents
presented under a Letter of Credit comply with the terms thereof. The parties
hereto expressly agree that:

                                Credit Agreement
<PAGE>
                                      -37-

            (i) the LC Bank may accept documents that appear on their face to be
      in substantial compliance with the terms of a Letter of Credit without
      responsibility for further investigation, regardless of any notice or
      information to the contrary, and may make payment upon presentation of
      documents that appear on their face to be in substantial compliance with
      the terms of such Letter of Credit;

            (ii) the LC Bank shall have the right, in its sole discretion, to
      decline to accept such documents and to make such payment if such
      documents are not in strict compliance with the terms of such Letter of
      Credit; and

            (iii) this sentence shall establish the standard of care to be
      exercised by the LC Bank when determining whether drafts and other
      documents presented under a Letter of Credit comply with the terms thereof
      (and the parties hereto hereby waive, to the extent permitted by
      applicable law, any standard of care inconsistent with the foregoing).

            (h) Disbursement Procedures. The LC Bank shall, within a reasonable
time following its receipt thereof, examine all documents purporting to
represent a demand for payment under a Letter of Credit. The LC Bank shall
promptly after such examination notify the Administrative Agent and the Lead
Borrower by telephone (confirmed by telecopy) of such demand for payment and
whether the LC Bank has made or will make an LC Disbursement thereunder;
provided that any failure to give or delay in giving such notice shall not
relieve the Borrowers of their obligation to reimburse the LC Bank and the
Lenders with respect to any such LC Disbursement.

            (i) Interim Interest. If the LC Bank shall make any LC Disbursement,
then, unless the Borrowers shall reimburse such LC Disbursement in full on the
date such LC Disbursement is made, the unpaid amount thereof shall bear
interest, for each day from and including the date such LC Disbursement is made
to but excluding the date that the Borrowers reimburse such LC Disbursement, at
the Federal Funds Effective Rate (as in effect from time to time); provided
that, if the Borrowers fail to reimburse such LC Disbursement when due pursuant
to paragraph (f) of this Section, then Section 2.12(c) shall apply. Interest
accrued pursuant to this paragraph shall be for account of the LC Bank, except
that interest accrued on and after the date of payment by any Lender pursuant to
paragraph (f) of this Section to reimburse the LC Bank shall be for account of
such Lender to the extent of such payment.

            (j) Replacement of the LC Bank. The LC Bank may be replaced (i) at
any time, and from time to time, by written agreement between the Borrowers, the
Administrative Agent, the replaced LC Bank and the successor LC Bank and (ii) at
any one time at the written request of the Borrowers, delivered to the
Administrative Agent, if at such time the short-term debt rating of the then
current LC Bank is lower than A-2 by Standard & Poor's or P-2 by Moody's,
pursuant to a written agreement between the Borrowers, the Administrative Agent
and the successor LC Bank. Each successor LC Bank shall be a Revolving Credit
Lender and shall have short-term debt ratings of A-2 or better by Standard &
Poor's and P-2 or better by Moody's at the time of its appointment and
acceptance as LC Bank. The appointment of a successor LC Bank shall be subject
to the reasonable consent of the Administrative Agent, and acceptance and
installation of any Revolving Credit Lender as successor LC Bank shall be in
such Revolving Credit Lender's sole and absolute discretion. The Administrative
Agent shall notify the Lenders

                               Credit Agreement
<PAGE>
                                      -38-

of any such replacement of the LC Bank. At the time any such replacement shall
become effective, the Borrowers shall pay all unpaid fees accrued for account of
the replaced LC Bank pursuant to Section 2.11(b). From and after the effective
date of any such replacement, (i) the successor LC Bank shall have all the
rights and obligations of the replaced LC Bank under this Agreement with respect
to Letters of Credit to be issued thereafter and (ii) references herein to the
term "LC Bank" shall be deemed to refer to such successor or to any previous LC
Bank, or to such successor and all previous LC Banks, as the context shall
require. After the replacement of an LC Bank hereunder, the replaced LC Bank
shall remain a party hereto and shall continue to have all the rights and
obligations of an LC Bank under this Agreement with respect to Letters of Credit
issued by it prior to such replacement, but shall not be required to issue
additional Letters of Credit.

            (k) Cash Collateralization. If either (i) an Event of Default shall
occur and be continuing and the Lead Borrower receives notice from the
Administrative Agent or the Required Lenders (or, if the maturity of the Loans
has been accelerated, Lenders with LC Exposure representing more than 50% of the
total LC Exposure) demanding the deposit of cash Collateral pursuant to this
paragraph, or (if such Event of Default is of the type referred to in clause (f)
or (g) of Article VII), without any demand or taking of any other action by the
Administrative Agent or Lenders, or (ii) the Borrowers shall be required to
provide cover for LC Exposure pursuant to Section 2.10(b) or Section 2.18(b),
the Borrowers shall immediately deposit into the Collateral Account an amount in
cash equal to, (x) in the case of an Event of Default, 105% of the sum of the LC
Exposure as of such date plus any accrued and unpaid interest thereon, (y) in
the case of cover pursuant to Section 2.10(b), the amount required under Section
2.10(b) and (z) in the case of cover pursuant to Section 2.18(b), the Applicable
Percentage of each Replaced Bank, prior to giving effect to the termination of
its Commitments, of the sum of the LC Exposure as of such date plus any accrued
and unpaid interest thereon; provided that the obligation to deposit such cash
Collateral shall become effective immediately, and such deposit shall become
immediately due and payable, without demand or other notice of any kind, upon
the occurrence of any Event of Default with respect to the Borrowers described
in clause (f) or (g) of Article VII. Such deposit shall be held by the
Administrative Agent in the Collateral Account as collateral security in the
first instance for the LC Exposure under this Agreement and thereafter for the
payment of the Secured Obligations.

            (l) Borrowers and Account Parties. Notwithstanding that any member
of the Chemco Consolidated Group or any Affiliate of Chemco is permitted under
the first sentence of Section 2.05(a) to be a named account party in any Letter
of Credit, the Borrowers shall be the actual joint and several account parties
for all purposes of this Agreement for such Letter of Credit and any statement
otherwise in any such Letter of Credit shall not limit or otherwise affect the
obligations of the Borrowers under this Agreement.

            (m) Letters of Credit Under the Existing Credit Agreement. On the
Effective Date, subject to the satisfaction of the conditions to effectiveness
of the obligations of the Lenders hereunder set forth in Article V, each
Existing Letter of Credit shall automatically, and without any action on the
part of any Person, become a Letter of Credit hereunder.

                               Credit Agreement
<PAGE>
                                      -39-

            Section 2.06. Funding of Borrowings.

            (a) Funding by Lenders. Each Lender shall make each Loan to be made
by it hereunder on the proposed date thereof by wire transfer of immediately
available funds by 4:00 p.m., New York City time, to the account of the
Administrative Agent most recently designated by it for such purpose by notice
to the Lenders; provided that Swingline Loans shall be made as provided in
Section 2.04. The Administrative Agent will make such Loans available to the
Borrowers by promptly crediting the amounts so received, in like funds, to an
account of the Borrowers maintained with the Administrative Agent in New York
City and designated by the Lead Borrower in the applicable Borrowing Request.

            (b) Presumption by the Administrative Agent. Unless the
Administrative Agent shall have received notice from a Lender prior to the
proposed date of any Borrowing that such Lender will not make available to the
Administrative Agent such Lender's share of such Borrowing, the Administrative
Agent may assume that such Lender has made such share available on such date in
accordance with paragraph (a) of this Section and may, in reliance upon such
assumption, make available to the Borrowers a corresponding amount. In such
event, if a Lender has not in fact made its share of the applicable Borrowing
available to the Administrative Agent, then the applicable Lender and the
Borrowers severally agree to pay to the Administrative Agent forthwith on demand
such corresponding amount with interest thereon, for each day from and including
the date such amount is made available to the Borrowers to but excluding the
date of payment to the Administrative Agent, at (i) in the case of such Lender,
the Federal Funds Effective Rate or (ii) in the case of the Borrowers, the
interest rate applicable to ABR Loans. If such Lender pays such amount to the
Administrative Agent, then such amount shall constitute such Lender's Loan
included in such Borrowing.

            Section 2.07. Interest Elections.

            (a) Elections by the Borrowers for Syndicated Borrowings. The Loans
constituting each Syndicated Borrowing initially shall be of the Type specified
in the applicable Borrowing Request and, in the case of a Eurodollar Borrowing,
shall have the Interest Period specified in such Borrowing Request. Thereafter,
the Lead Borrower may elect to convert such Borrowing to a Borrowing of a
different Type or to continue such Borrowing as a Borrowing of the same Type
and, in the case of a Eurodollar Borrowing, may elect the Interest Period
therefor, all as provided in this Section. The Lead Borrower may elect different
options with respect to different portions of the affected Borrowing, in which
case each such portion shall be allocated ratably among the Lenders holding the
Loans constituting such Borrowing, and the Loans constituting each such portion
shall be considered a separate Borrowing. This Section shall not apply to
Swingline Borrowings, which may not be converted or continued. The Lead Borrower
may not elect a Eurodollar Term Loan Borrowing for an Interest Period commencing
prior to July 6, 2001.

            (b) Notice of Elections. To make an election pursuant to this
Section, the Lead Borrower shall notify the Administrative Agent of such
election by telephone by the time that a Borrowing Request would be required
under Section 2.03 if the Lead Borrower were requesting a Syndicated Borrowing
of the Type resulting from such election to be made on the effective date of
such election. Each such telephonic Interest Election Request shall be
irrevocable and shall be confirmed promptly by hand delivery or telecopy to the
Administrative Agent a written

                               Credit Agreement
<PAGE>
                                      -40-

Interest Election Request providing the information specified in Section 2.07(c)
in a form approved by the Administrative Agent and signed by a Financial Officer
of the Lead Borrower.

            (c) Content of Interest Election Requests. Each telephonic and
written Interest Election Request shall specify the following information in
compliance with Section 2.02:

            (i) the Borrowing to which such Interest Election Request applies
      and, if different options are being elected with respect to different
      portions thereof, the portions thereof to be allocated to each resulting
      Borrowing (in which case the information to be specified pursuant to
      clauses (iii) and (iv) of this paragraph shall be specified for each
      resulting Borrowing);

            (ii) the effective date of the election made pursuant to such
      Interest Election Request, which shall be a Business Day;

            (iii) whether the resulting Borrowing is to be an ABR Borrowing or a
      Eurodollar Borrowing; and

            (iv) if the resulting Borrowing is a Eurodollar Borrowing, the
      Interest Period therefor after giving effect to such election, which shall
      be a period contemplated by the definition of the term "Interest Period"
      and permitted under Section 2.02(d).

            (d) Notice by the Administrative Agent to the Lenders. Promptly
following receipt of an Interest Election Request, the Administrative Agent
shall advise each Lender of the details thereof and of such Lender's portion of
each resulting Borrowing.

            (e) Failure to Elect; Events of Default. If the Lead Borrower fails
to deliver a timely and complete Interest Election Request with respect to a
Eurodollar Borrowing prior to the end of the Interest Period therefor, then,
unless such Borrowing is repaid as provided herein, at the end of such Interest
Period such Borrowing shall be converted to a Syndicated ABR Borrowing.
Notwithstanding any contrary provision hereof, if an Event of Default has
occurred and is continuing and the Administrative Agent, at the request of the
Required Lenders, so notifies the Lead Borrower, then, so long as an Event of
Default is continuing (i) no outstanding Syndicated Borrowing may be converted
to or continued as a Eurodollar Borrowing and (ii) unless repaid, each
Eurodollar Borrowing shall be converted to a Syndicated ABR Borrowing at the end
of the Interest Period therefor.

            Section 2.08. Termination and Reduction of the Commitments.

            (a) Scheduled Termination. (i) The Term Loan Commitments shall
terminate at 5:00 p.m., New York City time, on the Effective Date and (ii)
unless previously terminated, the Revolving Credit Commitments shall terminate
on the Revolving Credit Commitment Termination Date.

            (b) Voluntary Termination or Reduction. The Borrowers may at any
time terminate, or from time to time reduce, the Revolving Credit Commitments;
provided that (i) each reduction of the Revolving Credit Commitments pursuant to
this Section shall be in an amount that is $5,000,000 or a larger multiple of
$1,000,000, except for a reduction pursuant to

                               Credit Agreement
<PAGE>
                                      -41-

Section 2.18(b) in the amount of the Revolving Credit Commitment of a Replaced
Lender, and (ii) the Borrowers shall not terminate or reduce the Revolving
Credit Commitments if, after giving effect to any concurrent prepayment of the
Revolving Credit Loans in accordance with Section 2.10, the total Revolving
Credit Exposures would exceed the total Revolving Credit Commitments.

            (c) Notice of Voluntary Termination or Reduction. The Lead Borrower
shall notify the Administrative Agent of any election to terminate or reduce the
Revolving Credit Commitments under Section 2.08(b) at least three Business Days
prior to the effective date of such termination or reduction, specifying such
election and the effective date thereof. Promptly following receipt of any
notice, the Administrative Agent shall advise the Lenders of the contents
thereof. Each notice delivered by the Lead Borrower pursuant to this Section
shall be irrevocable; provided that a notice of termination of the Revolving
Credit Commitments delivered by the Lead Borrower may state that such notice is
conditioned upon the effectiveness of other credit facilities, in which case
such notice may be revoked by the Lead Borrower (by notice to the Administrative
Agent on or prior to the specified effective date) if such condition is not
satisfied.

            (d) Automatic Reduction, and Reinstatement. In connection with any
Disposition other than an Excluded Disposition, the Revolving Credit Commitments
shall, on the Initial Settlement Date of such Disposition, be reduced
automatically and temporarily in an amount equal to the Temporary Commitment
Reduction Amount of such Disposition pursuant to Section 2.10(b)(ii). The
Revolving Credit Commitments shall, at the time of each Special Borrowing, be
automatically reinstated (without necessity of any Lender's consent) in an
amount equal to the lesser of (i) the amount of such Special Borrowing and (ii)
the excess, if any, of the aggregate amount of all Temporary Commitment
Reduction Amounts over the aggregate principal amount of all other Special
Borrowings on or prior to the date of such Special Borrowing; provided that the
Revolving Credit Commitment Termination Date has not occurred or the Revolving
Commitments have not been terminated; provided further that the aggregate amount
of the Revolving Credit Commitments shall not, at any time, exceed the amount of
such Revolving Credit Commitments on the date hereof minus the aggregate amount
of all permanent reductions of such Revolving Credit Commitments effected prior
to or at such time. At 5:00 p.m., New York City time, on the Final Settlement
Date of each Disposition, the Revolving Credit Commitments shall be reduced
automatically and permanently as specified in Section 2.10(b)(iv).

            (e) Effect of Termination, Reduction and Reinstatement. Any
termination of the Commitments of either Class shall be permanent. Any reduction
of the Revolving Credit Commitments shall be permanent, except for any temporary
reduction pursuant to Sections 2.08(d) and 2.10(b)(ii), which may be reinstated
solely to the extent provided in Section 2.08(d). Each reduction of the
Revolving Credit Commitments shall be made ratably among the Lenders in
accordance with their respective Revolving Credit Commitments, except in
connection with the termination of Commitments of Replaced Lenders pursuant to
Section 2.18(b), which shall apply solely to the Commitments of such Replaced
Lenders. Each reinstatement of the Revolving Credit Commitments shall be made
ratably among the Revolving Credit Lenders in accordance with their respective
Revolving Credit Commitments.

                               Credit Agreement
<PAGE>
                                      -42-

            Section 2.09. Repayment of Loans; Evidence of Debt.

            (a) Repayment. The Borrowers hereby unconditionally promise to pay
the Loans as follows:

            (i) to the Administrative Agent for account of the Revolving Credit
      Lenders the outstanding principal amount of the Revolving Credit Loans on
      the Revolving Credit Commitment Termination Date,

            (ii) to the Administrative Agent for account of the Term Loan
      Lenders the outstanding principal amount of the Term Loans in 24
      consecutive installments, one such installment to be made on each
      Principal Payment Date, each in the amount set forth opposite the
      reference to the period during which such Principal Payment Date occurs
      (subject to adjustment pursuant to paragraph (b) of this Section):

<TABLE>
<CAPTION>
                        Period                               Amount($)
                        ------                               ---------
<S>                                                       <C>
      Each Principal Payment Date during the period
      from the date hereof to June 30, 2006, inclusive:   $   562,500.00

      Each Principal Payment Date during the period
      from July 1, 2006 to the Term Loan Maturity
      Date, inclusive:                                    $53,437,500.00
</TABLE>

            (iii) to the Swingline Lender the outstanding principal amount of
      each Swingline Loan on the earlier of the Revolving Credit Commitment
      Termination Date and the fifth Business Day after the date that such
      Swingline Loan is made.

            (b) Adjustment of Amortization Schedule. If the initial aggregate
amount of the Term Loan Commitments exceeds the aggregate principal amount of
Term Loans that are made on the Effective Date, then the scheduled repayments of
Term Loans to be made pursuant to Section 2.09(a)(ii) shall be reduced ratably
by an aggregate amount equal to the amount of such excess. Any prepayment of a
Term Borrowing shall be applied to reduce the subsequent scheduled installment
repayments of the Term Borrowings ratably. To the extent not previously paid,
all Term Loans shall be due and payable on the Term Loan Maturity Date.

            (c) Manner of Payment. Prior to any repayment or prepayment of any
Borrowings of either Class hereunder, the Lead Borrower shall select the
Borrowing or Borrowings of the applicable Class to be paid and shall notify the
Administrative Agent by telephone (confirmed by telecopy) of such selection not
later than 1:00 p.m., New York City time, three Business Days before the
scheduled date of such repayment, in the case of Eurodollar Loans, and 1:00
p.m., New York City time, on the scheduled date of such repayment, in the case
of ABR Loans. If the Lead Borrower fails to make a timely selection of the
Borrowing or Borrowings to be repaid or prepaid, such payment shall be applied,
first, to pay any outstanding ABR Borrowings of the applicable Class and,
second, to other Borrowings of such Class in the order of the remaining duration
of their respective Interest Periods (the Borrowing with the shortest remaining
Interest Period to be repaid first). Each payment of a Syndicated Borrowing
shall be applied ratably to the Loans included in such Borrowing.

                               Credit Agreement
<PAGE>
                                      -43-

            (d) Maintenance of Records by Lenders. Each Lender shall maintain in
accordance with its usual practice records evidencing the indebtedness of the
Borrowers to such Lender resulting from each Loan made by such Lender, including
the amounts of principal and interest payable and paid to such Lender from time
to time hereunder.

            (e) Maintenance of Records by the Administrative Agent. The
Administrative Agent shall maintain records in which it shall record (i) the
amount of each Loan made hereunder, the Class and Type thereof and each Interest
Period therefor, (ii) the amount of any principal or interest due and payable or
to become due and payable from the Borrowers to each Lender hereunder and (iii)
the amount of any sum received by the Administrative Agent hereunder for account
of the Lenders and each Lender's share thereof.

            (f) Effect of Entries. The entries made in the records maintained
pursuant to paragraph (d) or (e) of this Section shall be prima facie evidence
of the existence and amounts of the obligations recorded therein; provided that
the failure of any Lender or the Administrative Agent to maintain such records
or any error therein shall not in any manner affect the obligation of the
Borrowers to repay the Loans in accordance with the terms of this Agreement.

            (g) Promissory Notes. Any Lender may request that Loans of either
Class made by it be evidenced by a promissory note. In such event, the Borrowers
shall prepare, execute and deliver to such Lender a promissory note payable to
such Lender (or, if requested by such Lender, to such Lender and its registered
assigns) and in a form approved by the Administrative Agent. Thereafter, the
Loans evidenced by such promissory note and interest thereon shall at all times
(including after assignment pursuant to Section 9.04) be represented by one or
more promissory notes in such form payable to the payee named therein (or, if
such promissory note is a registered note, to such payee and its registered
assigns).

            Section 2.10. Prepayment of Loans.

            (a) Optional Prepayments. The Borrowers shall have the right at any
time and from time to time to prepay any Borrowing in whole or in part, subject
to the requirements of this Section. Any prepayment of the Term Loans pursuant
to this paragraph shall be applied to the installments thereof ratably.

            (b) Mandatory Prepayments; Dispositions Generally. Subject to
Section 2.10(c), and without limiting the obligation of the Borrowers to obtain
the consent of the Required Lenders pursuant to Section 6.08 to any Disposition
not otherwise permitted hereunder, the Borrowers shall prepay the Loans (and/or
provide cover for LC Exposure as specified in Section 2.05(k)), and/or the
Commitments shall be subject to automatic reduction, as follows:

            (i) Statements Regarding Dispositions. In the event of any
      Disposition other than an Excluded Disposition (the "Current
      Disposition"), the Lead Borrower shall deliver to the Administrative Agent
      a statement of the Lead Borrower certified by a Financial Officer, in form
      and detail satisfactory to the Administrative Agent, of (A) the amount of
      the Net Available Proceeds of the Current Disposition, (B) the aggregate
      amount of the Net Available Proceeds of all prior Dispositions, (C) the
      Special Proceeds Amount (as defined below) of such Current Disposition,
      (D) the amount of the Adjusted Net Available Proceeds (as defined below)
      of the Current Disposition, (E) the aggregate

                               Credit Agreement
<PAGE>
                                      -44-

      amount of the Adjusted Net Available Proceeds of all prior Dispositions
      and (F) the amount, if any, of the Adjusted Net Available Proceeds of the
      Current Disposition that the Borrowers intend to apply to the temporary
      reduction of the Revolving Credit Commitments. Each such statement shall
      be so delivered no later than one Business Day after the consummation of
      the applicable Disposition and receipt by any member of the Chemco Group
      or any other Person (paid at the direction of any member of the Chemco
      Group) of the Net Available Proceeds in respect thereof.

            For purposes of this Section:

            "Adjusted Net Available Proceeds" means, with respect to any Current
      Disposition, an amount equal to the sum of:

                  (i) an amount equal to the excess, if any, of (A) the
            aggregate amount of the Net Available Proceeds of such Current
            Disposition and all prior Dispositions other than Excluded
            Dispositions, minus the Special Proceeds Amount of such Disposition,
            over (B) the sum of (y) $15,000,000 for each Fiscal Year which shall
            have commenced on or prior to the date of receipt by any Person of
            the Net Available Proceeds of such Current Disposition, commencing
            with Fiscal Year 2001 and accumulating each Fiscal Year thereafter
            but at no time exceeding a total sum of $75,000,000 plus (z) the
            aggregate amount (without duplication) of the Net Available Proceeds
            of all prior Dispositions that shall have been (1) applied to prepay
            Loans (and/or provide cover for LC Exposure as specified in Section
            2.05(k)) and reduce the Commitments pursuant to Section 2.10(b)(ii)
            and (2) deposited in the Collateral Account and segregated for
            purposes of acquisitions and Capital Expenditures pursuant to
            Section 2.10(b)(iii); plus

                  (ii) the Special Proceeds Amount of such Disposition.

            "Final Settlement Date" means, with respect to any Current
      Disposition, the numerically corresponding day in the calendar month that
      is 18 months after the date of receipt by any Person of any Net Available
      Proceeds of such Current Disposition, provided that, if at the time of
      consummation of such Current Disposition any member of the Chemco
      Consolidated Group shall establish in accordance with GAAP a reserve for
      contingent liabilities arising as a result of such Current Disposition,
      the Final Settlement Date shall not, with respect to the amount of such
      reserve, occur earlier than the date on which such reserve is (or should
      be) dissolved in accordance with GAAP (it being understood that there may
      be more than one Final Settlement Date with respect to any Current
      Disposition).

            "Initial Settlement Date" means, with respect to any Current
      Disposition, the date that is five Business Days after the receipt by the
      Administrative Agent of the statement referred to in Section 2.10(b)(i) in
      respect of such Current Disposition, provided that if any of the Net
      Available Proceeds of such Current Disposition are of the type described
      in clause (V) of the definition of "Net Available Proceeds" set forth in
      Section 1.01, the Initial Settlement Date shall, with respect to such Net
      Available Proceeds, be the date on which the reserve referred to in such
      clause (V) is (or should be) dissolved in accordance

                               Credit Agreement
<PAGE>
                                      -45-

      with GAAP (it being understood that there may be more than one Initial
      Settlement Date with respect to any Current Disposition).

            "Reinvestment Period" means, with respect to any Current
      Disposition, the period commencing on the date of consummation of such
      Current Disposition and receipt by any Person of any Net Available
      Proceeds thereof and ending on the Final Settlement Date of such Current
      Disposition.

            "Special Proceeds Amount" means, with respect to any Current
      Disposition, the amount, if any, of the Net Available Proceeds of such
      Current Disposition that are of the type described in clause (III) or (IV)
      of the definition of "Net Available Proceeds" set forth in Section 1.01.

            "Temporary Commitment Reduction Amount" means, with respect to any
      Current Disposition, an amount equal to the lowest of the following: (A)
      the amount, if any, of the Net Available Proceeds set forth in a statement
      delivered by the Lead Borrower pursuant to Section 2.10(b)(i) in respect
      of such Current Disposition that the Borrowers intend to use for the
      purposes described in Section 2.10(b)(i)(F); (B) the amount of the
      Adjusted Net Available Proceeds of such Current Disposition; and (C) the
      aggregate amount of the Revolving Credit Commitments in effect on the
      Initial Settlement Date of such Current Disposition.

            (ii) Temporary Prepayment and Commitment Reduction. On the Initial
      Settlement Date of each Current Disposition, (A) the Revolving Credit
      Commitments shall be reduced automatically and temporarily in an amount
      equal to the applicable Temporary Commitment Reduction Amount and (B) the
      Borrowers shall, pursuant to Section 2.10(b)(vi) (assuming all Term Loans
      were paid in full), prepay the Loans and/or provide cover for LC Exposure
      as specified in Section 2.05(k).

            (iii) Cash Collateral Account. The Borrowers (or any of the other
      members of the Chemco Group) shall have deposited into the Collateral
      Account as of the Initial Settlement Date of each Current Disposition an
      amount (each, a "Special Reserve Amount") in cash equal to the excess, if
      any, of the Adjusted Available Net Proceeds of such Current Disposition
      over the amount, if any, of the Temporary Commitment Reduction Amount of
      such Current Disposition (it being understood and agreed that any deposit
      to the Collateral Account made pursuant to Section 6.21(d) shall satisfy
      the foregoing requirement of this clause (b)(iv) to the extent such
      deposit remains standing to the credit of the Collateral Account on such
      Initial Settlement Date). Such deposit shall be held by the Administrative
      Agent in the Collateral Account as collateral security for the Secured
      Obligations and (A) at any time (and from time to time) during the
      applicable Reinvestment Period may be released to the Borrowers in an
      aggregate amount not exceeding the Special Reserve Amount subject to the
      terms and conditions set forth herein and (B) at any time after the
      applicable Reinvestment Period, any remaining Special Reserve Amount may
      be released to the Borrowers on the terms and conditions of the Pledge and
      Security Agreement.

            (iv) Final Settlement. On the Final Settlement Date of each Current
      Disposition: (A) the Borrowers shall prepay the Loans (and/or provide
      cover for LC Exposure as

                               Credit Agreement
<PAGE>
                                      -46-

      specified in Section 2.05(k)), and/or the Commitments shall be subject to
      automatic reduction, in an amount equal to the Special Reserve Amount of
      such Current Disposition that has not been reduced by the Special
      Collateral Releases occurring on or prior to such date (it being
      understood and agreed that the amount of each Special Collateral Release
      shall reduce the Special Reserve Amounts in chronological order, provided
      that no amount of a Special Collateral Release shall reduce a Special
      Reserve Amount deposited prior to the Reinvestment Period of such Current
      Disposition); and (B) notwithstanding Section 2.10(b)(vi), the Revolving
      Credit Commitments shall, at 5:00 p.m. New York City time on such date, be
      reduced automatically and permanently in an amount equal to the amount of
      the Temporary Commitment Reduction Amount of such Current Disposition that
      has not been reduced by the Special Borrowings occurring on or prior to
      such date (it being understood and agreed that the amount of each Special
      Borrowing shall be deemed to reduce the Temporary Commitment Reduction
      Amounts in chronological order). It being understood that, subject to the
      terms and conditions hereof (including Sections 2.01, 2.03 and 5.02), the
      Borrowers may make a Special Borrowing on the Final Settlement Date of any
      Current Disposition for the permitted purposes of Special Borrowings,
      including prepayment of Term Loans.

            (v) Redesignation. On any Business Day during the Reinvestment
      Period of a Current Disposition so long as no Default has occurred and is
      continuing, the Lead Borrower may, upon five Business Days' notice to the
      Administrative Agent, elect to: (A) apply cash credited to the Collateral
      Account in an amount not greater than the Special Reserve Amount of such
      Current Disposition that has not been reduced by the Special Collateral
      Releases occurring on or prior to such date to the temporary reduction of
      the Revolving Credit Commitments and/or to prepay Revolving Credit Loans
      (and/or provide cover for LC Exposure as specified in Section 2.05(k)); or
      (B) reinstate the Revolving Credit Commitments in an amount not greater
      than the Temporary Commitment Reduction Amount of such Current Disposition
      that has not been reduced by the Special Borrowings occurring on or prior
      to such date by depositing an equal amount in cash to the Collateral
      Account. The Lead Borrower shall, together with such notice, deliver to
      the Administrative Agent a statement setting forth the Special Proceeds
      Amount and the Temporary Commitment Reduction Amount of the applicable
      Current Disposition as the proposed date of redesignation (prior to giving
      effect thereto) and the pro forma adjustments to such Special Proceeds
      Amount and Temporary Commitment Reduction Amount and to all other
      calculations necessary under this Section and Section 2.08 to effect the
      purposes hereof as if (y) such application of cash from the Collateral
      Account had effected a temporary reduction of Revolving Credit Commitments
      as of the Initial Settlement Date of such Current Disposition and (z) such
      reinstatement of the Revolving Credit Commitments had effected a deposit
      in cash to the Collateral Account as of the Initial Settlement Date. Such
      statement shall be determinative, subject to such further pro forma
      adjustments as the Administrative Agent shall deem appropriate, in
      connection with the subsequent application of this Section and Section
      2.08. The Administrative Agent may, in its reasonable discretion, take all
      appropriate actions to effect such redesignation. In addition, the Lead
      Borrower shall deliver each notice that may be required in connection with
      such redesignation, including under Sections 2.03 (Borrowing Request),
      2.10(d) (notice of prepayment) and 2.20 (Special Collateral Release
      Request).

                               Credit Agreement
<PAGE>
                                      -47-

            (vi) Application. Subject to Section 2.10(b)(ii)(B) and Section
      2.10(b)(v)(B), prepayments and/or reductions of Commitments pursuant to
      clause (b) of this Section shall be applied as follows:

                  first, to prepay the Term Loans (which prepayment of the Term
            Loans shall be applied to the installments thereof ratably); and

                  second, after the payment in full of the Term Loans, to reduce
            the aggregate amount of the Revolving Credit Commitments (and to the
            extent that, after giving effect to such reduction, the total
            Revolving Credit Exposures would exceed the Revolving Credit
            Commitments, the Borrowers shall, first, prepay Swingline Loans,
            second, repay outstanding reimbursement obligations in respect of LC
            Disbursements, third, prepay Revolving Credit Loans and fourth,
            provide cover for LC Exposure as specified in Section 2.05(k) in an
            aggregate amount equal to such excess).

            (c) Mandatory Prepayments; Specialty Chemicals Business. Without
limiting the obligation of the Borrowers to obtain the consent of the Required
Lenders pursuant to Section 6.08 to any Disposition not otherwise permitted
hereunder, the Lead Borrower shall deliver to the Lenders and the Administrative
Agent a notice of any Disposition of all or substantially all of the Specialty
Chemicals Business no later than five Business Days prior to the occurrence of
such Disposition and, upon such Disposition, the Borrowers will prepay all
Loans, pay all other amounts then accrued hereunder and provide cover for LC
Exposure as specified in Section 2.05(k), and the Commitments shall be
automatically terminated in their entirety.

            (d) Notices, Etc. The Lead Borrower shall notify the Administrative
Agent (and, in the case of prepayment of a Swingline Loan, the Swingline Lender)
by telephone (confirmed by telecopy) of any prepayment hereunder (i) in the case
of prepayment of a Eurodollar Borrowing, not later than 1:00 p.m., New York City
time, three Business Days before the date of prepayment, (ii) in the case of
prepayment of a Syndicated ABR Borrowing, not later than 1:00 p.m., New York
City time on the date of prepayment (which shall be a Business Day) or (iii) in
the case of prepayment of a Swingline Loan, not later than 4:00 p.m., New York
City time, on the date of prepayment. Each such notice shall be irrevocable and
shall specify the prepayment date, the principal amount of each Borrowing or
portion thereof to be prepaid and, in the case of a mandatory prepayment, a
reasonably detailed calculation of the amount of such prepayment; provided that,
if a notice of prepayment is given in connection with a conditional notice of
termination of the Revolving Credit Commitments as contemplated by Section 2.08,
then such notice of prepayment may be revoked if such notice of termination is
revoked in accordance with Section 2.08. Promptly following receipt of any such
notice relating to a Syndicated Borrowing or any statement referred to in
Section 2.10(b)(i), the Administrative Agent shall advise the relevant Lenders
of the contents thereof. Each partial prepayment of any Borrowing shall be in an
amount that would be permitted in the case of a Borrowing of the same Type as
provided in Section 2.02, except as necessary to apply fully the required amount
of a mandatory prepayment. Each prepayment of a Syndicated Borrowing shall be
applied ratably to the Loans included in the prepaid Borrowing. Prepayments
shall be accompanied by accrued interest to the extent required by Section 2.12
and shall be made in the manner specified in Section 2.09(c).

                               Credit Agreement
<PAGE>
                                      -48-

            Section 2.11. Fees.

            (a) Commitment Fee. The Borrowers agree to pay to the Administrative
Agent for account of each Lender a commitment fee, which shall accrue at a rate
per annum equal to 0.50% (or, if on any day the Applicable Level shall be Level
I, then 0.375% on such day) on the average daily unused amount of the Revolving
Credit Commitment of such Lender during the period from and including the date
hereof to but excluding the earlier of the date such Revolving Credit Commitment
terminates and the Revolving Credit Commitment Termination Date. Accrued
commitment fees shall be payable on each Quarterly Date and on the earlier of
the date the Revolving Credit Commitments terminate and the Revolving Credit
Commitment Termination Date, commencing on the first such date to occur after
the date hereof. All commitment fees shall be computed on the basis of a year of
360 days and shall be payable for the actual number of days elapsed (including
the first day but excluding the last day). For purposes of computing commitment
fees, the Revolving Credit Commitment of a Lender shall be deemed to be used to
the extent of the outstanding Revolving Credit Loans and LC Exposure of such
Lender (and the Swingline Exposure of such Lender shall be disregarded for such
purpose) and shall be deemed not to be reduced by the amount of any temporary
reduction thereof at any time during the period of such temporary reduction
(notwithstanding that, immediately after the end of such period, a permanent
reduction of the Revolving Credit Commitments may occur with respect to all or a
portion of such amount).

            (b) Letter of Credit Fees. The Borrowers agree to pay (i) to the
Administrative Agent for account of each Revolving Credit Lender a participation
fee with respect to their participations in Letters of Credit, which shall
accrue at a rate per annum equal to the Applicable Margin applicable to interest
on Revolving Credit Eurodollar Loans on the average daily amount of such
Lender's LC Exposure during the period from and including the Effective Date to
but excluding the later of the date on which such Lender's Revolving Credit
Commitment terminates and the date on which such Lender ceases to have any LC
Exposure, and (ii) to the LC Bank a fronting fee, which shall accrue at the rate
per annum of 0.25% on the average daily amount of the LC Exposure (excluding any
portion thereof attributable to unreimbursed LC Disbursements) during the period
from and including the Effective Date to but excluding the later of the date of
termination of the Revolving Credit Commitments and the date on which there
ceases to be any LC Exposure, as well as the LC Bank's standard fees with
respect to the issuance, amendment, renewal or extension of any Letter of Credit
or processing of drawings thereunder. Participation fees and fronting fees
accrued through and including each Quarterly Date shall be payable on the third
Business Day following such Quarterly Date, commencing on the first such date to
occur after the Effective Date; provided that all such fees shall be payable on
the date on which the Revolving Credit Commitments terminate and any such fees
accruing after the date on which the Revolving Credit Commitments terminate
shall be payable on demand. Any other fees payable to the LC Bank pursuant to
this paragraph shall be payable on demand. All participation fees and fronting
fees shall be computed on the basis of a year of 360 days and shall be payable
for the actual number of days elapsed (including the first day but excluding the
last day).

            (c) Administrative Agent Fees. The Borrowers agree to pay to the
Administrative Agent, for its own account, fees payable in the amounts and at
the times separately agreed upon between (i) the Lead Borrower, any of the
Borrowers and the Administrative Agent and (ii) ISP Chemical Products Inc.
(formerly known as ISP Chemicals Inc.) and ISP Tech (Texas) Inc. (formerly known
as ISP Technologies Inc.) and the

                               Credit Agreement
<PAGE>
                                      -49-

Administrative Agent in respect of the Transactions, and the Borrowers further
hereby agree to assume each of the fee obligations described under clause (ii)
above.

            (d) Payment of Fees. All fees payable hereunder shall be paid on the
dates due, in immediately available funds, to the Administrative Agent (or to
the LC Bank, in the case of fees payable to it) for distribution, in the case of
facility fees and participation fees, to the Lenders entitled thereto. Fees paid
shall not be refundable under any circumstances.

            Section 2.12. Interest.

            (a) ABR Loans. The Loans constituting each ABR Borrowing (including
each Swingline Loan) shall bear interest at a rate per annum equal to the
Alternate Base Rate plus the Applicable Margin.

            (b) Eurodollar Loans. The Loans constituting each Eurodollar
Borrowing shall bear interest at a rate per annum equal to the Adjusted LIBO
Rate for the applicable Interest Period for such Borrowing plus the Applicable
Margin.

            (c) Default Interest. Notwithstanding the foregoing, if any
principal of or interest on any Loan or any fee or other amount payable by the
Borrowers hereunder is not paid when due, whether at stated maturity, upon
acceleration, by mandatory prepayment or otherwise, such overdue amount shall
bear interest, after as well as before judgment, at a rate per annum equal to
(i) in the case of overdue principal of any Loan, 2% plus the rate otherwise
applicable to such Loan as provided above or (ii) in the case of any other
amount, 2% plus the rate applicable to ABR Loans as provided in paragraph (a) of
this Section.

            (d) Payment of Interest. Accrued interest on each Loan shall be
payable in arrears on each Interest Payment Date for such Loan and, in the case
of Revolving Credit Loans, upon termination of the Revolving Credit Commitments;
provided that (i) interest accrued pursuant to paragraph (c) of this Section
shall be payable on demand, (ii) in the event of any repayment or prepayment of
any Loan (other than a prepayment of a Revolving Credit ABR Loan prior to the
Revolving Credit Commitment Termination Date), accrued interest on the principal
amount repaid or prepaid shall be payable on the date of such repayment or
prepayment and (iii) in the event of any conversion of any Eurodollar Borrowing
prior to the end of the Interest Period therefor, accrued interest on such
Borrowing shall be payable on the effective date of such conversion.

            (e) Computation. All interest hereunder shall be computed on the
basis of a year of 360 days, except that interest computed by reference to the
Alternate Base Rate at times when the Alternate Base Rate is based on the Prime
Rate shall be computed on the basis of a year of 365 days (or 366 days in a leap
year), and in each case shall be payable for the actual number of days elapsed
(including the first day but excluding the last day). The applicable Alternate
Base Rate or Adjusted LIBO Rate shall be determined by the Administrative Agent,
and such determination shall be conclusive absent manifest error.

            Section 2.13. Alternate Rate of Interest. If prior to the
commencement of the Interest Period for any Eurodollar Borrowing:

                               Credit Agreement
<PAGE>
                                      -50-

            (a) the Administrative Agent determines (which determination shall
      be conclusive absent manifest error) that adequate and reasonable means do
      not exist for ascertaining the Adjusted LIBO Rate for such Interest
      Period; or

            (b) if such Borrowing is of a particular Class of Loans, the
      Administrative Agent is advised by the Required Lenders of such Class that
      the Adjusted LIBO Rate for such Interest Period will not adequately and
      fairly reflect the cost to such Lenders of making or maintaining their
      respective Loans included in such Borrowing for such Interest Period;

then the Administrative Agent shall give notice thereof to the Lead Borrower and
the Lenders by telephone or telecopy as promptly as practicable thereafter and,
until the Administrative Agent notifies the Lead Borrower and the Lenders that
the circumstances giving rise to such notice no longer exist, (i) any Interest
Election Request that requests the conversion of any Syndicated Borrowing to, or
the continuation of any Syndicated Borrowing as, a Eurodollar Borrowing shall be
ineffective and such Syndicated Borrowing (unless prepaid) shall be continued
as, or converted to, a Syndicated ABR Borrowing and (ii) if any Borrowing
Request requests a Eurodollar Borrowing for such Interest Period, such Borrowing
shall be made as a Syndicated ABR Borrowing.

            Section 2.14. Increased Costs.

            (a) Increased Costs Generally. If any Change in Law shall:

            (i) impose, modify or deem applicable any reserve, special deposit
      or similar requirement against assets of, deposits with or for account of,
      or credit extended by, any Lender (except any such reserve requirement
      reflected in the Adjusted LIBO Rate) or the LC Bank; or

            (ii) impose on any Lender or the LC Bank or the London interbank
      market any other condition affecting this Agreement or Eurodollar Loans
      made by such Lender or any Letter of Credit or participation therein;

and the result of any of the foregoing shall be to increase the cost to such
Lenders (other than by reason of any Taxes) of making or maintaining any
Eurodollar Loan (or of maintaining its obligation to make any such Loan) or to
increase the cost to such Lender or the LC Bank of participating in, issuing or
maintaining any Letter of Credit or to reduce the amount of any sum received or
receivable by such Lender or the LC Bank hereunder (whether of principal,
interest or otherwise), then, upon the demand by such affected Lender or the LC
Bank (as the case may be), the Borrowers will pay to the Administrative Agent
for account of such Lender or the LC Bank, as the case may be, such additional
amount or amounts as will compensate such Lender or the LC Bank, as the case may
be, for such additional costs incurred or reduction suffered.

            (b) Capital Requirements. If any Lender or the LC Bank determines
that any Change in Law regarding capital requirements has or would have the
effect of reducing the rate of return on such Lender's or the LC Bank's capital
or on the capital of such Lender's or the LC Bank's holding company, if any, as
a consequence of this Agreement or the Loans made by, or participations in
Letters of Credit held by, such Lender, or the Letters of Credit issued by the
LC

                               Credit Agreement
<PAGE>
                                      -51-

Bank, to a level below that which such Lender or the LC Bank or such Lender's or
the LC Bank's holding company could have achieved but for such Change in Law
(taking into consideration such Lender's or the LC Bank's policies and the
policies of such Lender's or the LC Bank's holding company with respect to
capital adequacy), then, upon the demand by such affected Lender or the LC Bank
(as the case may be), the Borrowers will pay to such Lender or the LC Bank, as
the case may be, such additional amount or amounts as will compensate such
Lender or the LC Bank or such Lender's or the LC Bank's holding company for any
such reduction suffered.

            (c) Certificates from Lenders. A certificate of a Lender or the LC
Bank setting forth in reasonable detail the basis and the amount or amounts
necessary to compensate such Lender or the LC Bank or its holding company, as
the case may be, as specified in paragraph (a) or (b) of this Section shall be
delivered to the Lead Borrower, together with a copy to the Administrative
Agent, and shall be conclusive absent manifest error. The Borrowers shall pay to
the Administrative Agent for account of such Lender or the LC Bank, as the case
may be, the amount shown as due on any such certificate within 10 days after
receipt by the Lead Borrower thereof.

            (d) Delay in Requests. Failure or delay on the part of any Lender or
the LC Bank to demand compensation pursuant to this Section shall not constitute
a waiver of such Lender's or the LC Bank's right to demand such compensation;
provided that, unless a Lender, the LC Bank or the Administrative Agent shall
deliver notice to the Lead Borrower within 45 days after the date that such
party obtains actual knowledge of the Change in Law giving rise to such
increased costs or reductions and of such Lender's or the LC Bank's intention to
claim compensation therefor, the Borrowers shall be required to compensate such
party solely for arising within 45 days prior to the date that such party
delivers such notice.

            Section 2.15. Break Funding Payments. In the event of (a) the
payment of any principal of any Eurodollar Loan other than on the last day of an
Interest Period therefor (including as a result of an Event of Default), (b) the
conversion of any Eurodollar Loan other than on the last day of an Interest
Period therefor, (c) the failure to borrow, convert, continue or prepay any
Syndicated Loan on the date specified in any notice delivered pursuant hereto
(regardless of whether such notice is permitted to be revocable under Section
2.10(c) and is revoked in accordance herewith), or (d) the assignment as a
result of a request by the Lead Borrower pursuant to Section 2.18(b) of any
Eurodollar Loan other than on the last day of an Interest Period therefor, then,
in any such event, the Borrowers shall compensate each Lender for the loss, cost
and expense attributable to such event. In the case of a Eurodollar Loan, the
loss to any Lender attributable to any such event shall be deemed to include an
amount determined by such Lender to be equal to the excess, if any, of (i) the
amount of interest that such Lender would pay for a deposit equal to the
principal amount of such Loan for the period from the date of such payment,
conversion, failure or assignment to the last day of the then current Interest
Period for such Loan (or, in the case of a failure to borrow, convert or
continue in accordance with the notice given and the provisions hereof, the
duration of the Interest Period that would have resulted from such borrowing,
conversion or continuation) if the interest rate payable on such deposit were
equal to the Adjusted LIBO Rate for such Interest Period, over (ii) the amount
of interest that such Lender would earn on such principal amount for such period
if such Lender were to invest such principal amount for such period at the
interest rate that would be bid by such Lender (or an affiliate of such Lender)
for Dollar deposits from other banks in the eurodollar

                               Credit Agreement
<PAGE>
                                      -52-

market at the commencement of such period. A certificate of any Lender setting
forth any amount or amounts that such Lender is entitled to receive pursuant to
this Section shall be delivered to the Lead Borrower, together with a copy to
the Administrative Agent, and shall be conclusive absent manifest error. The
Borrowers shall pay to the Administrative Agent for account of such Lender the
amount shown as due on any such certificate within 10 days after receipt by the
Lead Borrower thereof.

            Section 2.16. Taxes.

            (a) Payments Free of Taxes. Any and all payments by or on account of
any obligation of the Borrowers hereunder or under any other Credit Document
shall be made free and clear of and without deduction for any Indemnified Taxes
or Other Taxes; provided that if the Borrowers shall be required to deduct any
Indemnified Taxes or Other Taxes from such payments, then (i) the sum payable
shall be increased as necessary so that after making all required deductions
(including deductions applicable to additional sums payable under this Section)
the Administrative Agent, Lender or LC Bank (as the case may be) receives an
amount equal to the sum it would have received had no such deductions been made,
(ii) the Borrowers shall make such deductions and (iii) the Borrowers shall pay
the full amount deducted to the relevant Governmental Authority in accordance
with applicable law.

            (b) Payment of Other Taxes by the Borrowers. In addition, the
Borrowers shall pay any Other Taxes to the relevant Governmental Authority in
accordance with applicable law.

            (c) Indemnification by the Borrowers. The Borrowers shall indemnify
the Administrative Agent, each Lender and the LC Bank for the full amount of any
Indemnified Taxes or Other Taxes (including Indemnified Taxes or Other Taxes
imposed or asserted on or attributable to amounts payable under this Section)
paid by the Administrative Agent, such Lender or the LC Bank, as the case may
be, and any penalties, interest and reasonable expenses arising therefrom or
with respect thereto, whether or not such Indemnified Taxes or Other Taxes were
correctly or legally imposed or asserted by the relevant Governmental Authority.
A certificate as to the amount of such payment or liability delivered to the
Lead Borrower with a copy to the Administrative Agent by a Lender or the LC
Bank, or by the Administrative Agent on its own behalf or on behalf of a Lender
or the LC Bank, shall be conclusive absent manifest error. The Borrowers shall
pay to the Administrative Agent for account of itself, such Lender or the LC
Bank, as the case may be, the amount shown as due on any such certificate within
10 days after receipt by the Lead Borrower thereof.

            (d) Evidence of Payments. As soon as practicable after any payment
of Indemnified Taxes or Other Taxes by the Borrowers to a Governmental
Authority, the Lead Borrower shall deliver to the Administrative Agent the
original or a certified copy of a receipt issued by such Governmental Authority
evidencing such payment, a copy of the return reporting such payment or other
evidence of such payment reasonably satisfactory to the Administrative Agent.

            (e) Lenders. Any Lender that is entitled to an exemption from or
reduction of withholding tax under the law of the jurisdiction in which the
Borrowers are located, or any treaty to which such jurisdiction is a party, with
respect to payments under this Agreement shall deliver to the Lead Borrower,
together with a copy to the Administrative Agent, at the time or

                               Credit Agreement
<PAGE>
                                      -53-

times prescribed by applicable law or reasonably requested by the Lead Borrower,
such properly completed and executed documentation prescribed by applicable law
as will permit such payments to be made without withholding or at a reduced
rate.

            Section 2.17. Payments Generally; Pro Rata Treatment; Sharing of
Set-offs.

            (a) Payments by the Obligors. Each Obligor shall make each payment
required to be made by it hereunder (whether of principal, interest, fees or
reimbursement of LC Disbursements, or under Section 2.14, 2.15 or 2.16, or
otherwise) or under any other Credit Document (except to the extent otherwise
provided therein) prior to 4:00 p.m., New York City time, on the date when due,
in immediately available funds, without set-off or counterclaim. Any amounts
received after such time on any date may, in the discretion of the
Administrative Agent, be deemed to have been received on the next succeeding
Business Day for purposes of calculating interest thereon. All such payments
shall be made to the Administrative Agent at its offices at 270 Park Avenue, New
York, New York, except as otherwise expressly provided in the relevant Credit
Document and except for payments to be made under Section 9.03 or directly to
the LC Bank or the Swingline Lender as expressly provided herein, which shall be
made directly to the Persons entitled thereto, provided that, if at any time
that there is no acting Administrative Agent, any such payment to be made at
such time shall be made directly to the Person entitled thereto at the place
specified by such Person. The Administrative Agent shall distribute any such
payments received by it for account of any other Person to the appropriate
recipient promptly following receipt thereof. If any payment hereunder shall be
due on a day that is not a Business Day, the date for payment shall be extended
to the next succeeding Business Day and, in the case of any payment accruing
interest, interest thereon shall be payable for the period of such extension.
All payments hereunder or under any other Credit Document (except to the extent
otherwise provided therein) shall be made in Dollars.

            (b) Application of Insufficient Payments. If at any time
insufficient funds are received by and available to the Administrative Agent to
pay fully all amounts of principal, unreimbursed LC Disbursements, interest and
fees then due hereunder, such funds shall be applied (i) first, to pay interest
and fees then due hereunder, ratably among the parties entitled thereto in
accordance with the amounts of interest and fees then due to such parties, and
(ii) second, to pay principal and unreimbursed LC Disbursements then due
hereunder, ratably among the parties entitled thereto in accordance with the
amounts of principal and unreimbursed LC Disbursements then due to such parties.

            (c) Pro Rata Treatment. Except to the extent otherwise provided
herein: (i) each Syndicated Borrowing of a particular Class shall be made from
the relevant Lenders, each payment of commitment fee under Section 2.11 shall be
made for account of the relevant Lenders, and each termination or reduction of
the amount of the Commitments of a particular Class under Section 2.08 shall be
applied to the respective Commitments of such Class of the relevant Lenders, pro
rata according to the amounts of their respective Commitments of such Class;
(ii) each Syndicated Borrowing of any Class shall be allocated pro rata among
the relevant Lenders according to the amounts of their respective Commitments of
such Class (in the case of the making of Syndicated Loans) or their respective
Loans of such Class that are to be included in such Borrowing (in the case of
conversions and continuations of Loans); (iii) each payment or prepayment of
principal of Revolving Credit Loans and Term Loans by the Borrowers shall be
made for account of the relevant Lenders pro rata in accordance with the
respective unpaid

                               Credit Agreement
<PAGE>
                                      -54-

principal amounts of the Syndicated Loans of such Class held by them; and (iv)
each payment of interest on Revolving Credit Loans and Term Loans by the
Borrowers shall be made for account of the relevant Lenders pro rata in
accordance with the amounts of interest on such Loans then due and payable to
the respective Lenders.

            (d) Distribution of Collateral. Subject to Section 5.09 of the
Pledge and Security Agreement, each amount collected or otherwise realized by
the Administrative Agent in respect of the Collateral while an Event of Default
has occurred and is continuing shall be allocated and paid over to (i) the
Revolving Credit Lenders, the Swingline Lender and the LC Bank and (ii) the Term
Loan Lenders in respect of the Secured Obligations due and owing (including
provision of cover for LC Exposure) to them pro rata in accordance with the
Revolving Credit Exposure (or, if the Revolving Credit Commitments have not been
terminated, the Revolving Credit Commitments) and the aggregate principal amount
of the Term Loans, respectively.

            (e) Sharing of Payments by Lenders. If any Lender shall, by
exercising any right of set-off or counterclaim or otherwise, obtain payment in
respect of any principal of or interest on any of its Syndicated Loans or
participations in LC Disbursements or Swingline Loans resulting in such Lender
receiving payment of a greater proportion of the aggregate amount of its
Syndicated Loans and participations in LC Disbursements and Swingline Loans and
accrued interest thereon then due than the proportion received by any other
Lender, then the Lender receiving such greater proportion shall purchase (for
cash at face value) participations in the Syndicated Loans and participations in
LC Disbursements and Swingline Loans of other Lenders to the extent necessary so
that the benefit of all such payments shall be shared by the Lenders ratably in
accordance with the aggregate amount of principal of and accrued interest on
their respective Syndicated Loans and participations in LC Disbursements and
Swingline Loans; provided that (i) if any such participations are purchased and
all or any portion of the payment giving rise thereto is recovered, such
participations shall be rescinded and the purchase price restored to the extent
of such recovery, without interest, and (ii) the provisions of this paragraph
shall not be construed to apply to any payment made by any Obligor pursuant to
and in accordance with the express terms of this Agreement or any payment
obtained by a Lender as consideration for the assignment of or sale of a
participation in any of its Loans or participations in LC Disbursements to any
assignee or participant, other than to the Borrowers or any Subsidiary or
Affiliate thereof (as to which the provisions of this paragraph shall apply).
Each Obligor consents to the foregoing and agrees, to the extent it may
effectively do so under applicable law, that any Lender acquiring a
participation pursuant to the foregoing arrangements may exercise against such
Obligor rights of set-off and counterclaim with respect to such participation as
fully as if such Lender were a direct creditor of such Obligor in the amount of
such participation.

            (f) Presumptions of Payment. Unless the Administrative Agent shall
have received notice from the Lead Borrower prior to the date on which any
payment is due to the Administrative Agent for account of the Lenders or the LC
Bank hereunder that the Borrowers will not make such payment, the Administrative
Agent may assume that the Borrowers have made such payment on such date in
accordance herewith and may, in reliance upon such assumption, distribute to the
Lenders or the LC Bank, as the case may be, the amount due. In such event, if
the Borrowers have not in fact made such payment, then each of the Lenders or
the LC Bank, as the case may be, severally agrees to repay to the Administrative
Agent forthwith on demand the amount so distributed to such Lender or the LC
Bank with interest thereon, for each

                               Credit Agreement
<PAGE>
                                      -55-

day from and including the date such amount is distributed to it to but
excluding the date of payment to the Administrative Agent, at the Federal Funds
Effective Rate.

            (g) Certain Deductions by the Administrative Agent. If any Lender
shall fail to make any payment required to be made by it pursuant to Section
2.04(c), 2.05(e), 2.06(b) or 2.17(f), then the Administrative Agent may, in its
discretion (notwithstanding any contrary provision hereof), apply any amounts
thereafter received by the Administrative Agent for account of such Lender to
satisfy such Lender's obligations under such Sections until all such unsatisfied
obligations are fully paid.

            Section 2.18. Mitigation Obligations; Replacement of Lenders.

            (a) Designation of a Different Lending Office. If any Lender
requests compensation under Section 2.14, or if the Borrowers are required to
pay any additional amount to any Lender or any Governmental Authority for
account of any Lender pursuant to Section 2.16, then such Lender shall use
reasonable efforts to designate a different lending office for funding or
booking its Loans hereunder or to assign its rights and obligations hereunder to
another of its offices, branches or affiliates, if, in the judgment of such
Lender, such designation or assignment (i) would eliminate or reduce amounts
payable pursuant to Section 2.14 or 2.16, as the case may be, in the future and
(ii) would not subject such Lender to any unreimbursed cost or expense and would
not otherwise be disadvantageous to such Lender. The Borrowers hereby agree to
pay all reasonable costs and expenses incurred by any Lender in connection with
any such designation or assignment. A certificate setting forth in reasonable
detail the basis and amount of such costs and expenses shall be delivered to the
Lead Borrower, together with a copy to the Administrative Agent, by the affected
Lender, and shall be conclusive absent manifest error. The Borrowers shall pay
to the Administrative Agent for account of such Lender the amount shown as due
on any such certificate within 10 days after receipt by the Lead Borrower
thereof.

            (b) Replacement of Lenders. Subject to Section 2.05(j) and the
following sentences of this Section, in the event that a Replacement Event
occurs and is continuing with respect to any Lender (a "Replaced Lender"), the
Lead Borrower may either:

            (i) designate a financial institution that is not a member of the
      Chemco Group or an Affiliate thereof (each, a "Replacement Lender")
      acceptable to the Administrative Agent, the LC Bank and the Swingline
      Lender (which acceptance will not be unreasonably withheld), to assume
      such Replaced Lender's Commitment hereunder, to purchase the Loans and
      participations of such Replaced Lender and such Replaced Lender's rights
      hereunder, without recourse to or representation or warranty by, or
      expense to, such Replaced Lender, for a purchase price equal to the
      outstanding principal amount of the Loans and the participations (or, in
      the case of the Swingline Lender, direct interests) in Swingline Loans
      payable to such Replaced Lender, plus any accrued but unpaid interest on
      such Loans and accrued but unpaid fees and other amounts owing hereunder
      to such Replaced Lender; or

            (ii) by notice given as provided in Section 2.08(c), terminate the
      Commitments of all Replaced Lenders as to which a Replacement Event has
      then occurred and prepay the Loans of such Replaced Lenders, all Swingline
      Loans and provide cover for the LC

                               Credit Agreement
<PAGE>
                                      -56-

      Exposure of such Replaced Lenders as specified in Section 2.05(k);
      provided that at the time of the termination of such Commitments, the
      aggregate amount of all Commitments that shall have been terminated
      pursuant to this clause (b) (including the Commitments then proposed to be
      terminated) shall not exceed 20% of the aggregate amount of the
      Commitments on the date hereof.

            In the event of the designation by the Lead Borrower of a
Replacement Lender pursuant to clause (i) of the preceding sentence, subject to
the execution and delivery to the Administrative Agent and the Replaced Lender
by the Replacement Lender of an Assignment and Acceptance substantially in the
form of Exhibit A and the payment to the Administrative Agent by the Borrowers
on behalf of such Replaced Lender of the processing and recordation fee
specified in Section 9.04(b), the Replacement Lender shall succeed to the rights
and obligations of such Replaced Lender hereunder and such Replaced Lender shall
no longer be a party hereto or have any rights hereunder; provided that the
obligations of the Obligors to such Replaced Lender under Sections 2.14, 2.15,
2.16 and 9.03 with respect to events occurring or obligations arising before or
as a result of such replacement, and all of the rights of the LC Bank hereunder
(including continuing entitlement to fees under Section 2.11(b)) and under the
other Credit Documents with respect to outstanding Letters of Credit issued by
it and its LC Exposure, shall survive such replacement. Promptly following its
replacement by the Replacement Lender, the Replaced Lender shall return to the
Borrowers any Note delivered by the Borrowers to such Replaced Lender.

            Any termination of Commitments, prepayment of Loans and providing of
cover for LC Exposure shall not affect any obligations of any Lender as to which
a Replacement Event shall not have then occurred. At the time of such
termination, prepayment and providing of cover in respect of a Replaced Lender,
the Borrowers shall pay to such Replaced Lender all fees and other amounts owing
to it hereunder. The obligations of the Obligors to such Replaced Lender under
Sections 2.14, 2.15, 2.16 and 9.03 with respect to events occurring or
obligations arising before or as a result of such termination, prepayment and
providing of cover shall survive such termination, prepayment and providing of
cover.

            The Lead Borrower may not exercise its rights under clause (b) of
this Section with respect to any Lender (i) in the case of circumstances
described in clause (a)(i) of the definition of "Replacement Event" in Section
1.01, unless the Lead Borrower exercises such rights with respect to all Lenders
to which circumstances described in said clause (a)(i) apply and (ii) in the
case of circumstances described in clause (a)(ii) of such definition of
"Replacement Event", if a Default has occurred and is then continuing.

            Section 2.19. Agency; Joint and Several Liability.

            (a) Each of the Obligors hereby irrevocably appoints the Lead
Borrower as its agent, in the case of the Borrowers, under this Agreement and
the other Credit Documents and, in the case of the other Obligors, under the
Pledge and Security Agreement, and authorizes the Lead Borrower to take such
actions on its behalf and to exercise such powers as are delegated to the Lead
Borrower by the terms hereof or thereof (including by reference to Lead Borrower
herein or therein), together with such actions and powers as are reasonably
incidental thereto, and the Lead Borrower hereby accepts such appointment.
Notice and knowledge of the Lead Borrower with respect to each matter related to
the Transactions shall be imputed to the Obligors

                               Credit Agreement
<PAGE>
                                      -57-

at the time that the Lead Borrower is first chargeable with such notice or
knowledge. All notices, requests, certificates, statements and other documents
executed and delivered by, and other actions of, the Lead Borrower shall be
performed by it in its representative capacity, and all such actions whether or
not expressly performed in such representative capacity shall nonetheless be
deemed to be the representations, warranties, requests and other actions, as the
case may be, of the Borrowers, in respect of the Credit Documents, and the other
Obligors, in respect of the Pledge and Security Agreement.

            The Lead Borrower may resign at any time by notifying the
Administrative Agent and the Obligors, provided that such resignation shall not
become effective until the earlier of (i) the appointment by the Borrowers and
the other Obligors of another Borrower as successor Lead Borrower, and
acceptance by such Borrower of such appointment and (ii) the date that is 30
days after delivery of notice by the retiring Lead Borrower of its resignation.
At any time that there is no acting Lead Borrower under any of the Credit
Documents, all rights and obligations of the Borrowers and the other Obligors,
including the delivery of notices, requests, certificates, statements and other
documents, permitted to be exercised or performed by the Lead Borrower on behalf
of the Borrowers or the other Obligors shall be performed by the Borrowers, in
respect of the Credit Documents other than the Pledge and Security Agreement,
and the Obligors, in respect of the Pledge and Security Agreement, and
references to the Lead Borrower in the Credit Documents shall be deemed to be
references to the Borrowers and the Obligors, respectively.

            (b) The Borrowers shall be jointly and severally liable for the
payment and performance of all obligations and covenants required by this
Agreement to be performed by any of them, including the Lead Borrower as their
agent, and each Borrower shall be bound by any notices (including notices of
Borrowings, conversions and continuations), consents or other actions furnished
or taken by the Lead Borrower or any other Borrower hereunder. At the request of
the Administrative Agent or any Lender to the Lead Borrower, each Borrower shall
confirm in writing its obligation owing with respect to any action taken or
proposed to be taken by the Lead Borrower or any other Borrower hereunder;
provided that the failure by any Borrower to furnish such confirmation shall not
affect such Borrower's obligations under the preceding sentence or any other
provision of this Agreement. In the event that the Administrative Agent receives
inconsistent notices from the Lead Borrower and/or any of the Borrowers, it
shall be entitled to act in compliance with any such notice or to take no action
pursuant to such notices.

            (c) The Obligors shall be liable for the actions, or inactions, of
the Lead Borrower in respect of the Pledge and Security Agreement, including
with respect to any notices, requests, certificates, statements and other
documents that the Lead Borrower shall deliver thereunder. In the event that the
Administrative Agent receives inconsistent notices from the Lead Borrower and/or
any of the Obligors, it shall be entitled to act in compliance with any such
notice or to take no action pursuant to such notices.

            (d) The designation by any Obligor or the Lead Borrower of an
individual as a Financial Officer shall be effective until 15 days after the
Administrative Agent receives notice from such Obligor or the Lead Borrower, as
the case may be, of the revocation of such designation. Each of the Obligors and
Lead Borrower shall be liable for the actions, or inactions, of any individual
designated on its behalf as a Financial Officer, including with respect to any

<PAGE>
                                      -58-

notices, requests, certificates, statements and other documents that such
individual shall deliver as its Financial Officer.

            Section 2.20. Requests for Special Collateral Releases.

            (a) Notice by the Lead Borrower. To request a Special Collateral
Release, the Lead Borrower shall notify the Administrative Agent of such request
by telephone, not later than 11:00 a.m., New York City time, two Business Days
before the date of the proposed release. Each such telephonic Borrowing Request
shall be irrevocable and shall be confirmed promptly by hand delivery or
telecopy to the Administrative Agent of a written Special Collateral Release
Request providing the information specified in Section 2.20(b) in a form
approved by the Administrative Agent and signed by the Lead Borrower.

            (b) Content of Special Collateral Release Requests. Each telephonic
and written Borrowing Request shall specify the following information in
compliance with Section 2.02:

            (i) the aggregate amount of the requested Special Collateral
      Release;

            (ii) the date of such Special Collateral Release, which shall be a
      Business Day;

            (iii) whether the proceeds of such Special Collateral Release are to
      be used to finance one or more acquisitions or for Capital Expenditures,
      to pay any liability (to the extent that a reserve for such liability had
      been established at the time of such Disposition) or to prepay Loans
      and/or provide cover for LC Exposure (and, if for the latter purpose, the
      Lead Borrower shall also deliver a notice of prepayment pursuant to
      Section 2.10(d));

            (iv) the particular Cash Equivalents credited to the Collateral
      Account that the Borrowers desire the Administrative Agent to sell, redeem
      or otherwise liquidate for purposes of the Special Collateral Release; and

            (v) the location and number of the Borrowers' account to which funds
      are to be disbursed, which shall comply with the requirements of Section
      2.06.

            (c) Notice by the Administrative Agent to the Lenders. Promptly
following receipt of a Special Collateral Release Request in accordance with
this Section, the Administrative Agent shall advise each Lender of the details
thereof.

                                   ARTICLE III

                                    GUARANTEE

            Section 3.01. The Guarantee. The Subsidiary Guarantors hereby
jointly and severally guarantee to each Lender, the LC Bank and the
Administrative Agent and their respective successors and assigns the prompt
payment in full when due (whether at stated maturity, by acceleration or
otherwise) of the principal of and interest on the Loans made by the Lenders to
the Borrowers, of the reimbursement obligations (and interest thereon) and cover
in respect of Letters of Credit, fees provided for hereunder and all other
amounts from time to time

                               Credit Agreement
<PAGE>
                                      -59-

owing to the Lenders, the LC Bank or the Administrative Agent by the Borrowers
under this Agreement and by any Obligor under any of the other Credit Documents,
and all obligations of the Borrowers or any of their Subsidiaries to any Lender
(or any affiliate of any Lender) in respect of any Hedge Agreement, in each case
strictly in accordance with the terms thereof (such obligations being herein
collectively called the "Guaranteed Obligations"). The Subsidiary Guarantors
hereby further jointly and severally agree that if the Borrowers shall fail to
pay in full when due (whether at stated maturity, by acceleration or otherwise)
any of the Guaranteed Obligations, the Subsidiary Guarantors will promptly pay
the same, without any demand or notice whatsoever, and that in the case of any
extension of time of payment or renewal of any of the Guaranteed Obligations,
the same will be promptly paid in full when due (whether at extended maturity,
by acceleration or otherwise) in accordance with the terms of such extension or
renewal.

            For purposes hereof, it is understood that any Guaranteed
Obligations to any Person arising under an agreement entered into at a time such
Person (or an affiliate thereof) is party hereto as a Lender shall continue to
constitute Guaranteed Obligations, notwithstanding that such Person (or its
affiliate) has ceased to be a Lender party hereto (by assigning all of its
Commitments, Loans, Revolving Credit Exposure and other interests herein) at the
time a claim is to be made in respect of such Guaranteed Obligations.

            Section 3.02. Obligations Unconditional. The obligations of the
Subsidiary Guarantors under Section 3.01 are absolute and unconditional, joint
and several, irrespective of the value, genuineness, validity, regularity or
enforceability of the obligations of the Borrowers under this Agreement or any
other agreement or instrument referred to herein, or any substitution, release
or exchange of any other guarantee of or security for any of the Guaranteed
Obligations, and, to the fullest extent permitted by applicable law,
irrespective of any other circumstance whatsoever that might otherwise
constitute a legal or equitable discharge or defense of a surety or guarantor,
it being the intent of this Section that the obligations of the Subsidiary
Guarantors hereunder shall be absolute and unconditional, joint and several,
under any and all circumstances. Without limiting the generality of the
foregoing, it is agreed that the occurrence of any one or more of the following
shall not alter or impair the liability of the Subsidiary Guarantors hereunder,
which shall remain absolute and unconditional as described above:

            (i) at any time or from time to time, without notice to the
      Subsidiary Guarantors, the time for any performance of or compliance with
      any of the Guaranteed Obligations shall be extended, or such performance
      or compliance shall be waived;

            (ii) any of the acts mentioned in any of the provisions of this
      Agreement or any other agreement or instrument referred to herein shall be
      done or omitted;

            (iii) the maturity of any of the Guaranteed Obligations shall be
      accelerated, or any of the Guaranteed Obligations shall be modified,
      supplemented or amended in any respect, or any right under this Agreement
      or any other agreement or instrument referred to herein shall be waived or
      any other guarantee of any of the Guaranteed Obligations or any security
      therefor shall be released or exchanged in whole or in part or otherwise
      dealt with; or

                               Credit Agreement
<PAGE>
                                      -60-

            (iv) any Lien granted to, or in favor of, the Administrative Agent
      or any Lender or Lenders as security for any of the Guaranteed Obligations
      shall fail to be perfected.

The Subsidiary Guarantors hereby expressly waive diligence, presentment, demand
of payment, protest and all notices whatsoever, and any requirement that the
Administrative Agent or any Lender exhaust any right, power or remedy or proceed
against the Borrowers under this Agreement or any other agreement or instrument
referred to herein, or against any other Person under any other guarantee of, or
security for, any of the Guaranteed Obligations.

            Section 3.03. Reinstatement. The obligations of the Subsidiary
Guarantors under this Article shall be automatically reinstated if and to the
extent that for any reason any payment by or on behalf of the Borrowers in
respect of the Guaranteed Obligations is rescinded or must be otherwise restored
by any holder of any of the Guaranteed Obligations, whether as a result of any
proceedings in bankruptcy or reorganization or otherwise, and the Subsidiary
Guarantors jointly and severally agree that they will indemnify the
Administrative Agent and each Lender on demand for all reasonable costs and
expenses (including fees of counsel) incurred by the Administrative Agent or
such Lender in connection with such rescission or restoration, including any
such costs and expenses incurred in defending against any claim alleging that
such payment constituted a preference, fraudulent transfer or similar payment
under any bankruptcy, insolvency or similar law.

            Section 3.04. Subrogation. The Subsidiary Guarantors hereby jointly
and severally agree that until the payment and satisfaction in full of all
Guaranteed Obligations and the expiration and termination of the Commitments of
the Lenders under this Agreement they shall not exercise any right or remedy
arising by reason of any performance by them of their guarantee in Section 3.01,
whether by subrogation or otherwise, against the Borrowers or any other
guarantor of any of the Guaranteed Obligations or any security for any of the
Guaranteed Obligations.

            Section 3.05. Remedies. The Subsidiary Guarantors jointly and
severally agree that, as between the Subsidiary Guarantors and the Lenders, the
obligations of the Borrowers under this Agreement may be declared to be
forthwith due and payable as provided in Article VII (and shall be deemed to
have become automatically due and payable in the circumstances provided in
Article VII) for purposes of Section 3.01 notwithstanding any stay, injunction
or other prohibition preventing such declaration (or such obligations from
becoming automatically due and payable) as against the Borrowers and that, in
the event of such declaration (or such obligations being deemed to have become
automatically due and payable), such obligations (whether or not due and payable
by the Borrowers) shall forthwith become due and payable by the Subsidiary
Guarantors for purposes of Section 3.01.

            Section 3.06. Instrument for the Payment of Money. Each Subsidiary
Guarantor hereby acknowledges that the guarantee in this Article constitutes an
instrument for the payment of money only, and consents and agrees that any
Lender or the Administrative Agent, at its sole option, in the event of a
dispute by such Subsidiary Guarantor in the payment of any moneys due hereunder,
shall have the right to bring motion-action under New York CPLR Section 3213.

            Section 3.07. Continuing Guarantee. The guarantee in this Article is
a continuing guarantee, and shall apply to all Guaranteed Obligations whenever
arising.

                               Credit Agreement
<PAGE>
                                      -61-

            Section 3.08. Rights of Contribution. The Subsidiary Guarantors
hereby agree, as between themselves, that if any Subsidiary Guarantor shall
become an Excess Funding Guarantor (as defined below) by reason of the payment
by such Subsidiary Guarantor of any Guaranteed Obligations, each other
Subsidiary Guarantor shall, on demand of such Excess Funding Guarantor (but
subject to the next sentence), pay to such Excess Funding Guarantor an amount
equal to such other Subsidiary Guarantor's Pro Rata Share (as defined below and
determined, for this purpose, without reference to the properties, debts and
liabilities of such Excess Funding Guarantor) of the Excess Payment (as defined
below) in respect of such Guaranteed Obligations. The payment obligation of a
Subsidiary Guarantor to any Excess Funding Guarantor under this Section shall be
subordinate and subject in right of payment to the prior payment in full of the
obligations of such Subsidiary Guarantor under the other provisions of this
Article and such Excess Funding Guarantor shall not exercise any right or remedy
with respect to such excess until payment and satisfaction in full of all of
such obligations.

            For purposes of this Section, (i) "Excess Funding Guarantor" means,
in respect of any Guaranteed Obligations, a Subsidiary Guarantor that has paid
an amount in excess of its Pro Rata Share of such Guaranteed Obligations, (ii)
"Excess Payment" means, in respect of any Guaranteed Obligations, the amount
paid by an Excess Funding Guarantor in excess of its Pro Rata Share of such
Guaranteed Obligations and (iii) "Pro Rata Share" means, for any Subsidiary
Guarantor, the ratio (expressed as a percentage) of (x) the amount by which the
aggregate present fair saleable value of all properties of such Subsidiary
Guarantor (excluding any shares of stock of any other Subsidiary Guarantor)
exceeds the amount of all the debts and liabilities of such Subsidiary Guarantor
(including contingent, subordinated, unmatured and unliquidated liabilities, but
excluding the obligations of such Subsidiary Guarantor hereunder and any
obligations of any other Subsidiary Guarantor that have been Guaranteed by such
Subsidiary Guarantor) to (y) the amount by which the aggregate fair saleable
value of all properties of all of the Subsidiary Guarantors exceeds the amount
of all the debts and liabilities (including contingent, subordinated, unmatured
and unliquidated liabilities, but excluding the obligations of the Borrowers and
the Subsidiary Guarantors hereunder and under the other Credit Documents) of all
of the Subsidiary Guarantors, determined (A) with respect to any Subsidiary
Guarantor that is a party hereto on the Effective Date, as of the Effective
Date, and (B) with respect to any other Subsidiary Guarantor, as of the date
such Subsidiary Guarantor becomes a Subsidiary Guarantor hereunder.

            Section 3.09. General Limitation on Guarantee Obligations. In any
action or proceeding involving any state corporate law, or any state or Federal
bankruptcy, insolvency, reorganization or other law affecting the rights of
creditors generally, if the obligations of any Subsidiary Guarantor under
Section 3.01 would otherwise, taking into account the provisions of Section
3.08, be held or determined to be void, invalid or unenforceable, or
subordinated to the claims of any other creditors, on account of the amount of
its liability under Section 3.01, then, notwithstanding any other provision
hereof to the contrary, the amount of such liability shall, without any further
action by such Subsidiary Guarantor, any Lender, the Administrative Agent or any
other Person, be automatically limited and reduced to the highest amount that is
valid and enforceable and not subordinated to the claims of other creditors as
determined in such action or proceeding.

                               Credit Agreement
<PAGE>
                                      -62-

                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES

            Each of the Obligors represents and warrants that:

            Section 4.01. Corporate Existence. Such Obligor:

            (a) is a corporation, partnership or other entity duly organized,
      validly existing and in good standing under the laws of the jurisdiction
      of its organization;

            (b) has all requisite corporate or other power and authority, and
      has all material governmental licenses, authorizations, consents and
      approvals, necessary to own its assets and carry on its business as now
      being or as proposed to be conducted; and

            (c) is qualified to do business and is in good standing in all
      jurisdictions in which the nature of the business conducted by it makes
      such qualification necessary and where failure so to qualify, individually
      or in the aggregate, could have a Material Adverse Effect.

            Section 4.02. Financial Condition. The Lead Borrower has heretofore
furnished to each of the Lenders (i) consolidated balance sheets of the Chemco
Consolidated Group as at each of December 31, 1999 and December 31, 2000 and the
related consolidated statements of income, retained earnings and cash flow of
the Chemco Consolidated Group for the Fiscal Year ended on each said date, with
the opinion thereon of Arthur Andersen LLP, and (ii) the unaudited consolidated
balance sheets of the Chemco Consolidated Group as at April 1, 2001 and the
related consolidated statements of income, retained earnings and cash flow of
the Chemco Consolidated Group for the three-month period ended on such date. All
such financial statements fairly present the consolidated financial condition of
the Chemco Consolidated Group and the financial condition of each Borrower, as
at said dates and the results of their operations for the respective Fiscal Year
and (in the case of the Chemco Consolidated Group) Fiscal Quarter ended on said
dates (subject, in the case of such financial statements as at April 1, 2001, to
normal year-end audit adjustments and to the absence of footnote disclosures).
Except as set forth in Schedule IV, neither Chemco nor any of its Subsidiaries
had on April 1, 2001 any material contingent liabilities, material liabilities
for taxes, unusual and materially unfavorable forward or long-term commitments
or unrealized or anticipated losses in material amounts from any unfavorable
commitments. Since December 31, 2000, no event has occurred and no circumstance
exists or has existed that has had a Material Adverse Effect.

            Section 4.03. Litigation. Except as set forth in Schedule IV, there
are no legal or arbitral proceedings, or any proceedings by or before any
Governmental Authority, now pending or (to the knowledge of the Borrowers)
threatened against any Obligor with a reasonable possibility of an adverse
determination that, individually or in the aggregate, if adversely determined,
could have a Material Adverse Effect.

            Section 4.04. No Breach. None of the execution and delivery of this
Agreement, and the other Credit Documents, the consummation of the Transactions
or compliance with the terms and provisions hereof and thereof will (a) conflict
with or result in a breach of, or require any consent under, (i) the charter or
by-laws of any Obligor, (ii) any applicable law or regulation,

                               Credit Agreement
<PAGE>
                                      -63-

or any order, writ, injunction or decree of any Governmental Authority binding
on any Obligor, or (iii) any agreement or instrument (other than an immaterial
agreement or instrument) to which Chemco or any of its Subsidiaries is a party
or by which any of them or any of their property is bound or to which any of
them is subject, (b) constitute a default under any such agreement or instrument
(other than an immaterial agreement or instrument), or (c) result in the
creation or imposition of any Lien under any such agreement or instrument (other
than an immaterial agreement or instrument) upon any of the properties or
revenues of Chemco or any of its Subsidiaries. For purposes of this Section, an
"immaterial agreement or instrument" means an agreement or instrument the
relevant breach of or default under which would not have a Material Adverse
Effect or would not subject any Lender, the LC Bank or the Administrative Agent
to any liability (in tort or otherwise).

            Section 4.05. Action. Each Obligor has all necessary corporate
power, authority and legal right to execute, deliver and perform its obligations
under and to consummate the transactions contemplated by each of the Credit
Documents to which it is a party; the execution, delivery and performance by
each Obligor of and the consummation of the transactions contemplated by each of
the Credit Documents to which it is a party have been duly authorized by all
necessary corporate action on its part (including any required shareholder
approvals); and this Agreement has been duly and validly executed and delivered
by each Obligor and constitutes, and each of the Credit Documents to which it is
a party when executed and delivered by such Obligor (in the case of any Notes,
for value) will constitute, its legal, valid and binding obligation, enforceable
against each Obligor in accordance with its terms, except as such enforceability
may be limited by (a) bankruptcy, insolvency, reorganization, moratorium or
similar laws of general applicability affecting the enforcement of creditors'
rights and (b) the application of general principles of equity (regardless of
whether such enforceability is considered in a proceeding in equity or at law).

            Section 4.06. Approvals No authorizations, approvals or consents of,
and no filings or registrations with, any Governmental Authority or any
securities exchange are necessary for the execution, delivery or performance by
any Obligor of this Agreement and the other Credit Documents to which it is a
party, the consummation of the transactions contemplated hereby or thereby or
the legality, validity or enforceability hereof or thereof, except for such
authorizations, approvals, consents, filings and registrations as have been
effected prior to the Effective Date and are in full force and effect and for
any filings in accordance with the periodic reporting requirements of the
Securities Exchange Act of 1934.

            Section 4.07. Use of Credit. Neither Chemco nor any of its
Subsidiaries is engaged principally, or as one of its important activities, in
the business of extending credit for the purpose, whether immediate, incidental
or ultimate, of buying or carrying Margin Stock, and no part of the proceeds of
any extension of credit hereunder will be used for such purpose.

            Section 4.08. ERISA. No ERISA Event has occurred or is reasonably
expected to occur that, when taken together with all other such ERISA Events for
which liability is reasonably expected to occur, could reasonably be expected to
result in a Material Adverse Effect. The accumulated benefit obligation under
each Plan (based on the assumptions used for purposes of Statement of Financial
Accounting Standards No. 87) did not, as of the date of the most recent
financial statements reflecting such amounts, exceed by more than $2,500,000 the
fair market value of the assets of such Plan, and the accumulated benefit
obligations of all underfunded Plans (based on the assumptions used for purposes
of Statement of Financial

                               Credit Agreement
<PAGE>
                                      -64-

Accounting Standards No. 87) did not, as of the date of the most recent
financial statements reflecting such amounts, exceed by more than $2,500,000 the
fair market value of the assets of all such underfunded Plans.

            Section 4.09. Taxes. As of the Effective Date, Chemco and its
Subsidiaries are members of an affiliated group of corporations filing
consolidated returns for Federal income tax purposes, of which ISP is the
"common parent" (within the meaning of Section 1504 of the Code) of such group
(the "ISP Tax Group"). Except for the Tax Sharing Agreement, there is no tax
sharing, tax allocation or similar agreement to which Chemco or any of its
Subsidiaries is a signatory currently in effect providing for the manner in
which tax payments owing by the members of such affiliated group (whether in
respect of Federal or state income or other taxes) with respect to the current
and future taxable years are allocated among the members of the group. Each
member of the ISP Tax Group, including ISP and its Subsidiaries, has filed
(either directly, or indirectly through ISP) all Federal income tax returns and
all other material tax returns that are required to be filed by them and have
paid (either directly, or indirectly through ISP) all taxes shown to be due
pursuant to such returns or pursuant to any assessment received by ISP or by
Chemco or any of its Subsidiaries, except to the extent any taxes are being
contested in good faith by proper proceedings and against which adequate
reserves are being maintained. The charges, accruals and reserves on the books
of Chemco and its Subsidiaries in respect of taxes and other governmental
charges are, in the opinions of the Borrowers, adequate. As of the Effective
Date, the United States Federal income tax returns covering the members of the
ISP Tax Group, and their predecessors in interest, have been examined and closed
through the Fiscal Year ended in 1989.

            Section 4.10. Investment Company Act. None of Chemco and its
Subsidiaries is an "investment company", or a company "controlled" by an
"investment company", within the meaning of the Investment Company Act of 1940.

            Section 4.11. Public Utility Holding Company Act. None of Chemco and
its Subsidiaries is a "holding company", or an "affiliate" of a "holding
company" or a "subsidiary company" of a "holding company", within the meaning of
the Public Utility Holding Company Act of 1935.

            Section 4.12. Indebtedness and Liens.

            (a) Part A of Schedule II is a complete and correct list, as of the
Effective Date, of all Indebtedness, extensions of credit (or commitments for
any extension of credit) to, or Guarantees by, Chemco or any of its
Subsidiaries, including Existing Letters of Credit (other than (i) any
Indebtedness, extensions of credit, commitments or guarantees by one member of
the Chemco Consolidated Group in favor of another member of such group and (ii)
except for Existing Letters of Credit, Indebtedness the aggregate principal
amount of which does not exceed $100,000 for any individual item or $1,000,000
in the aggregate for all such non-listed items), and the aggregate principal or
face amount thereof outstanding or that may become outstanding.

            (b) Part B of Schedule II is a complete and correct list of each
Permitted Lien that, as of the Effective Date, secures Indebtedness (other than
Liens created under the Security Documents) of any member of the Chemco Group.
No Lien affects any property of any member of the Chemco Group other than
Permitted Liens and Liens listed on Part C of Schedule II to the extent the
Title Company is willing to omit such Liens from the title policies issued
pursuant to

                               Credit Agreement
<PAGE>
                                      -65-

Section 6.22(c)(i) (and, if the Title Company has issued such title policies, to
the extent such Liens are omitted therefrom).

            Section 4.13. Hazardous Materials. All members of the Chemco Group
have obtained all permits, licenses and other authorizations which are required
under all Environmental Laws in effect as of the date this representation is
made or deemed made, except to the extent that the consequence of the failure to
do so (whether with respect to any one such permit, license or other
authorization or all such permits, licenses and other authorizations not
obtained) would not, individually or in the aggregate, result in a Material
Adverse Effect. All members of the Chemco Group are in compliance with the terms
and conditions of all such permits, licenses and other authorizations, and are
also in compliance with all other limitations, restrictions, conditions,
standards, prohibitions, requirements, obligations, schedules and timetables
contained in any applicable Environmental Law in effect as of the date this
representation is made or deemed made or in any regulation, code, plan, order,
decree, judgment, injunction, notice or demand letter issued, entered,
promulgated or approved thereunder, except to the extent failure to comply would
not, individually or in the aggregate, result in a Material Adverse Effect.

            In addition, except as set forth in Schedule V, or except to the
extent that the circumstances causing any of the following statements
(individually or in the aggregate) could not be reasonably expected to have a
Material Adverse Effect:

            (a) No notice, notification, demand, request for information,
      citation, summons or order has been issued, no complaint has been filed,
      no penalty has been assessed and no investigation or review is pending or,
      to the knowledge of any member of the Chemco Group, threatened by any
      governmental or other entity with respect to any alleged failure by any
      member of the Chemco Group to have any material permit, license or
      authorization required in connection with the conduct of the business of
      any member of the Chemco Group or with respect to any material generation,
      treatment, storage, recycling, transportation, handling, disposal or
      Release of any Hazardous Material by any member of the Chemco Group.

            (b) No notice, notification, demand, request for information,
      citation, summons or order has been issued, no complaint has been filed,
      no penalty has been assessed and no investigation or review is pending or,
      to the knowledge of any member of the Chemco Group, threatened by any
      governmental or other entity with respect to any member of the Chemco
      Group under any Environmental Law.

            (c) No member of the Chemco Group has handled any Hazardous
      Material, other than as a generator, on any property now or previously
      owned or leased by any member of the Chemco Group, and:

                  (i) no equipment containing concentration of polychlorinated
            biphenyl ("PCB") greater than 50 ppm is present at any property now
            owned or leased by any member of the Chemco Group;

                  (ii) there are no underground storage tanks containing
            Hazardous Materials, active or abandoned, at any property now owned
            or leased by any member of the Chemco Group;

                               Credit Agreement
<PAGE>
                                      -66-

                  (iii) to the knowledge of any Obligor (after due inquiry and
            investigation), no Hazardous Materials have been Released, in a
            reportable quantity, where such a quantity has been established by
            applicable Environmental Laws, at, on or under any property now
            owned or leased by any member of the Chemco Group or owned or leased
            by any member of the Chemco Group at the time of any such Release;
            and

                  (iv) to the knowledge of any Obligor (after due inquiry and
            investigation), no Hazardous Materials have been otherwise Released
            at, on or under any property now owned or leased by any member of
            the Chemco Group or owned or leased by any member of the Chemco
            Group at the time of any such Release.

            (d) To the knowledge of any Obligor, no member of the Chemco Group
      has transported or arranged for the transportation of any Hazardous
      Material to any location which is listed on the National Priorities List
      under the Comprehensive Environmental Response, Compensation and Liability
      Act of 1980 ("CERCLA") listed for possible inclusion on the National
      Priorities List by the Environmental Protection Agency in the
      Comprehensive Environmental Response and Liability Information System, as
      provided for by 40 C.F.R. Section 300.5 ("CERCLIS") or on any similar
      state list or which is the subject of federal, state or local enforcement
      actions or other investigations which may lead to claims against any
      member of the Chemco Group for clean-up costs, remedial work, damages to
      natural resources or personal injury claims, including, but not limited
      to, claims under CERCLA.

            (e) No Hazardous Material generated by any member of the Chemco
      Group has been recycled, treated, stored, disposed of or Released by any
      member of the Chemco Group at any locations other than those listed in
      Schedule V.

            (f) No oral or written notification of a Release of a Hazardous
      Material has been filed with any governmental agency or authority by or on
      behalf of any member of the Chemco Group and, to the knowledge of any
      Obligor, no property now or previously owned or leased by any member of
      the Chemco Group is listed or proposed for listing on the National
      Priorities List promulgated pursuant to CERCLA, on CERCLIS or on any
      similar state list of sites requiring investigation or clean-up.

            (g) There are no Liens arising under or pursuant to any
      Environmental Laws in effect as of the date this representation is made or
      deemed made on any of the real property or properties owned or leased by
      any member of the Chemco Group and no government actions have been taken
      or are in process which could subject any of such properties to such Liens
      and, to the knowledge of any Obligor, no member of the Chemco Group would
      be required to place any notice or restriction relating to the presence of
      Hazardous Material at any property owned by it in any deed to such
      property.

            Section 4.14. Subsidiaries, Etc. Set forth in Part A of Schedule VI
is a complete and correct list, as of the Effective Date, of all Subsidiaries of
Chemco and all other Investments held, directly or indirectly, by any member of
the Chemco Group in any joint venture or other Affiliate and, for each such
Investment, (x) the identity of the Person or Persons holding such

                               Credit Agreement
<PAGE>
                                      -67-

Investment and (y) the nature and amount of such Investment, including the
issuer of such Investment (including any Person in which such Investment is
made), the form and jurisdiction of organization of such issuer, a description
of the type and class of such Investment, the number of shares, if any, held by
each Person referred to in clause (x) above of such Investment and the
percentage held by each Person referred to in clause (x) above of the aggregate
amount outstanding as of the Effective Date of such Investment. Chemco owns,
free and clear of Liens (other than Liens created pursuant to the Secured
Documents), all outstanding shares of stock of its respective Subsidiaries (and
each such Subsidiary owns, free and clear of Liens (other than Liens created
pursuant to the Secured Documents), all outstanding shares of stock of its
Subsidiaries), and all such shares are validly issued, fully paid and
non-assessable.

            Section 4.15. Disclosure. The information, reports, financial
statements, exhibits and schedules furnished in writing by or on behalf of the
Obligors to the Administrative Agent or any Lender in connection with the
negotiation, preparation or delivery of this Agreement and the other Credit
Documents or included herein or therein or delivered pursuant hereto or thereto,
when taken as a whole, did not at the time furnished or at the Effective Date
contain any untrue statement of material fact or omit to state any material fact
necessary to make the statements herein or therein, in light of the
circumstances under which they were made, not misleading. All written
information furnished after the date hereof by Chemco and its Subsidiaries to
the Administrative Agent and the Lenders in connection with this Agreement and
the other Credit Documents and the transactions contemplated hereby and thereby
will be true, complete and accurate in every material respect, or based on
reasonable estimates, on the date as of which such information is stated or
certified.

            Section 4.16. Patents, Trademarks, Etc. Each member of the Chemco
Group owns, or is licensed or otherwise has the right to use, all patents,
trademarks, service marks, trade names, copyrights, technology, know-how and
processes used in or necessary for the conduct of its businesses as currently
conducted, except where the failure to own or have the license or other right to
use the same could not be reasonably expected to have a Material Adverse Effect.
To the knowledge of any Obligor, the use of such patents, trademarks, service
marks, trade names, copyrights, technology, know-how and processes by the
members of the Chemco Group does not infringe on the rights of any Person,
except where any such infringement could not be reasonably expected to have a
Material Adverse Effect.

            Section 4.17. Real Property. Part A of Schedule VII is a complete
and correct list, as of the Effective Date, of each real property (each a
"Closing Date Mortgaged Property") owned by the Obligors as of such date, which
is, as of such date, subject to a valid, binding and enforceable Lien created in
favor of the Administrative Agent pursuant to one or more Security Documents,
and the name of such Obligor holding an interest therein; Part B of Schedule VII
is a complete and correct list, as of the Effective Date, of each real property
(each a "Post-closing Mortgaged Property") owned or leased by the Obligors (as
indicated therein) as of such date, which shall be, to the extent required by
Section 6.22(c)(vi)), subject to a valid, binding and enforceable Lien created
in favor of the Administrative Agent pursuant to one or more Security Documents,
and the name of such Obligor holding an interest therein; and Part C of Schedule
VII is a complete and correct list, as of the Effective Date, of each real
property owned, and each leasehold interest in real property leased by, the
Obligors (other than the real properties and leasehold interests listed in Part
A or B of Schedule VII) as of such date and the name of such Obligor holding an
interest therein. The Chemco Group has good, legal and marketable title to all
real properties that it purports to own and a valid subsisting leasehold
interest in all the

                               Credit Agreement
<PAGE>
                                      -68-

properties it purports to lease free and clear of all Liens except for (y) in
the case of real properties owned, and leasehold interests leased, by the
Foreign Subsidiaries, Permitted Liens, (z) in the case of real properties owned,
and leasehold interests leased, by the Obligors, Permitted Liens and Liens
listed on Part C of Schedule II to the extent the Title Company is willing to
omit such Liens from the title policies issued pursuant to Section 6.22(c)(i).

            Section 4.18. Compliance with Laws and Agreements. Each of Chemco
and its Subsidiaries is in compliance with all laws, regulations and orders of
any Governmental Authority applicable to it or its property and all indentures,
agreements and other instruments binding upon it or its property, except where
the failure to do so, individually or in the aggregate, could not reasonably be
expected to result in a Material Adverse Effect. No Default has occurred and is
continuing.

            Section 4.19. Restrictions on Subsidiaries. None of the Subsidiaries
of Chemco is subject to any indenture, agreement, instrument or other
arrangement of the type described in Section 6.19, other than of a type
described in the proviso thereto.

            Section 4.20. Investments. Set forth in Part B of Schedule VI is a
complete and correct list of all Investments referred to in Section 6.07(b) and
Part C of Schedule VI is a complete and correct list of all Investments (other
than Investments disclosed in Part A or Part B of Schedule VI and other than
Investments of the types referred to in clauses (c) and (i) of Section 6.07), in
each case held, directly or indirectly, by Chemco or any of its Subsidiaries in
any Person as of the Effective Date and, for each such Investment, (x) the
identity of the Person or Persons holding such Investment and (y) the nature,
amount and value of such Investment, including the issuer of such Investment (or
Person in which such Investment is made), a description of the type and class of
such Investment, the number of shares (or percentage share if so denominated) of
such Investment and the value of such Investment as of the Effective Date.
Except as disclosed in Schedule VI, each of Chemco and its Subsidiaries owns,
free and clear of all Liens (other than Liens created pursuant to the Security
Documents), all Investments listed in such Schedule.

            Section 4.21. Collateral Security. Each Security Document creates a
valid Lien in all right, title and interest of each Obligor that is a party to
such Security Document in and to the Collateral described (and however defined)
in such Security Document, and each such Lien constitutes a first-priority Lien
enforceable against all lien creditors, secured parties and (prior and
subsequent) bona fide purchasers and such Collateral is not subject to any other
Liens, except for Permitted Liens and to the extent provided in Section 6.22 or
such Security Document (or any related policy of title insurance delivered to
the Administrative Agent at the time of creation of the Lien in favor of the
Administrative Agent in such Collateral).

                                    ARTICLE V

                                   CONDITIONS

            Section 5.01. Effective Date. The obligations of the Lenders to make
Loans and of the LC Bank to issue Letters of Credit and to continue the Existing
Letters of Credit hereunder shall not become effective until the date (the
"Effective Date") specified in a notice from the Administrative Agent to the
Lead Borrower and the Lenders to the effect that the Administrative

                               Credit Agreement
<PAGE>
                                      -69-

Agent shall have received each of the following (together with sufficient copies
for the Lenders), each of which shall be satisfactory to the Administrative
Agent (and to the extent specified below, to each Lender) in form and substance
(or such condition shall have been waived with the consent of each Lender,
except in the case of clauses (b) (solely with respect to local counsel
opinions), (f) and (g) below, which may also be waived in whole or in part by
the Administrative Agent):

            (a) Executed Counterparts. From each party hereto either (i) a
      counterpart of this Agreement signed on behalf of such party or (ii)
      written evidence satisfactory to the Administrative Agent (which may
      include telecopy transmission of a signed signature page to this
      Agreement) that such party has signed a counterpart of this Agreement.

            (b) Opinions of Counsel to the Obligors. Favorable written opinions
      (addressed to the Administrative Agent, the LC Bank and the Lenders and
      dated the Effective Date) of (i) Weil, Gotshal & Manges LLP, counsel to
      the Obligors, (ii) Richard A. Weinberg, General Counsel to the Obligors,
      and (iii) such other counsel (reasonably acceptable to the Administrative
      Agent) to the applicable Obligors for each jurisdiction (other than those
      jurisdictions covered by the opinions of the Persons referred to clauses
      (i) and (ii) above) the law of which governs the creation, perfection and
      priority of each Lien provided for by the Security Documents, in each case
      covering such matters relating to the Borrowers, the Credit Documents, the
      Liens provided for by the Security Documents, the Transactions and the Tax
      Sharing Agreement as shall be reasonably requested by, and in form and
      substance satisfactory to, the Administrative Agent, the LC Bank, the
      Lenders and special New York counsel to the Administrative Agent (and each
      Obligor hereby instructs such counsel to deliver such opinion to the
      Administrative Agent, the LC Bank and the Lenders).

            (c) Opinion of Special New York Counsel to the Administrative Agent.
      An opinion (addressed to the Administrative Agent, the LC Bank and the
      Lenders and dated the Effective Date) of Milbank, Tweed, Hadley & McCloy
      LLP, special New York counsel to the Administrative Agent, in form and
      substance satisfactory to the Administrative Agent, the LC Bank and the
      Lenders (and the Administrative Agent hereby instructs such counsel to
      deliver such opinion to the LC Bank and the Lenders).

            (d) Corporate Documents. Such documents and certificates, dated on
      or reasonably prior to the Effective Date, as the Administrative Agent or
      its counsel may reasonably request relating to the organization,
      existence, good standing of each Obligor, qualification to do business of
      each Obligor for each jurisdiction (i) in which it has an interest in real
      property that will be subject to a Lien created under the Security
      Documents or (ii) in which its chief executive office is located, the
      authorization of the Transactions and the Tax Sharing Agreement and any
      other legal matters relating to the Obligors, this Agreement or the
      Transactions, all in form and substance satisfactory to the Administrative
      Agent and its counsel.

            (e) Officer's Certificate. A certificate, dated the Effective Date
      and signed by a Senior Officer of each Borrower, certifying (i) compliance
      with the conditions set forth in the lettered clauses of the first
      sentence of Section 5.02 and (ii) that, as of the Effective Date, each
      Unrestricted Entity has a net worth, determined in accordance with GAAP,
      not greater than zero and has no assets as of the Effective Date.

                               Credit Agreement
<PAGE>
                                      -70-

            (f) Security Documents. Each Security Document as the Administrative
      Agent shall reasonably request, duly executed and delivered by each
      Obligor and other Person intended to be a party thereto, in each case in
      form and substance satisfactory to the Administrative Agent and special
      New York counsel to the Administrative Agent (including in form necessary
      or desirable to file, record or register, as applicable) and all
      documentary Collateral provided for under such Security Document,
      including all security certificates, instruments, letters of credit and
      chattel paper.

            (g) Real Property Title Reports, Mortgage Releases and Surveys. (i)
      Title search reports ("Title Reports") with respect to the Closing Date
      Mortgaged Properties, each dated on or reasonably prior to the Effective
      Date, prepared by the Title Company; (ii) evidence of the termination of
      each Lien indicated to be securing a monetary obligation in such Title
      Reports (except for any Permitted Liens), or (in the case of any such
      Lien) (x) a mortgage release or like instrument duly executed and
      delivered by the mortgagee in respect of any such Lien or (y) a copy of
      the title affidavit executed by the applicable Obligors in favor of the
      Title Company or such other evidence reasonably satisfactory to the
      Administrative Agent to evidence the Title Company's willingness to delete
      such Lien from the applicable title policy to be issued pursuant to
      Section 6.22(c)(i), all in form and substance satisfactory to the
      Administrative Agent; and evidence that a survey of the type described in
      Section 6.22(c)(ii) shall have been ordered by the Borrowers for each of
      the Closing Date Mortgaged Properties;

            (h) Personal Property Lien Searches and Terminations. (i) Certified
      copies of search reports, each dated on or reasonably prior to the
      Effective Date and certified by a Person reasonably acceptable to the
      Administrative Agent, with respect to Uniform Commercial Code filings,
      federal and state tax Liens, judgment Liens and PBGC Liens for each
      Obligor and each jurisdiction in which a Uniform Commercial Code financing
      statement may be filed under applicable law (as in effect prior to, on or
      after July 1, 2001) to perfect the personal property Collateral of such
      Obligor provided for under the Security Documents to which such Obligor is
      intended to be a party and (ii) evidence of the termination of each Lien
      indicated in such search reports (except for any Permitted Liens),
      including duly executed Uniform Commercial Code termination statements, in
      each case in form and substance satisfactory to the Administrative Agent.

            (i) Required Senior Subordinated Debt. Evidence that the Required
      Senior Subordinated Debt Documents shall have been duly authorized,
      executed and delivered, and that the notes evidencing the Required Senior
      Subordinated Debt shall have been duly issued, in each case containing
      terms in form and substance satisfactory to each Lender, and the
      Administrative Agent shall have received copies of each of the Required
      Senior Subordinated Debt Documents certified by a Financial Officer of the
      Lead Borrower. The Administrative Agent shall have also received a
      certificate of the Lead Borrower signed by a Financial Officer to the
      effect that the Borrowers shall have received net cash proceeds from the
      issuance of the Required Senior Subordinated Debt pursuant to the Required
      Senior Subordinated Debt Documents in an aggregate amount at least equal
      to $200,000,000 (before deducting the payment of any transaction
      expenses). In addition, the Administrative Agent shall have also received
      evidence that the net proceeds of the Required Senior Subordinated Debt
      shall have been deposited by (or on

                               Credit Agreement
<PAGE>
                                      -71-

      behalf of) the Borrowers on or before the Effective Date in the escrow
      with the Wilmington Trust Company as provided for by the Required Senior
      Subordinated Debt Documents for the sole purpose of redeeming or otherwise
      retiring the ISP 2002 Notes.

            (j) Repayment of Existing Indebtedness. Evidence that the principal
      of and interest on, and all fees and other amounts owing in respect of,
      the Existing Credit Agreement (other than contingent reimbursement
      obligations in respect of Existing Letters of Credit) on the Effective
      Date shall have been (or shall be simultaneously) paid in full, that any
      commitments to extend credit under the Existing Credit Agreement shall
      have been terminated and that all Guarantees in respect of the Existing
      Credit Agreement shall have been released.

            (k) Environmental Review. Evidence of satisfactory results of a
      review by the Administrative Agent and the Lenders (including discussions
      with the Obligors' consultants and counsel) of environmental matters with
      respect to the real properties in which any Obligor has an interest.

            (l) Credit Ratings. Letters dated on or reasonably prior to the
      Effective Date from Moody's and Standard & Poor's setting forth their
      respective final ratings of the Indebtedness in respect of this Agreement.

            (m) Promissory Notes. A Note in favor of each Lender that shall have
      requested a promissory note pursuant to Section 2.09(g).

            (n) Fees and Expenses. Evidence of payment (i) all fees required to
      be paid to Chase (for account of itself and the Lead Arranger) or any
      Lender in connection with this Agreement on or before the Effective Date,
      (ii) the reasonable expenses of Chase and/or the Lead Arranger and the
      Administrative Agent, including (A) the reasonable fees and expenses of
      Milbank, Tweed, Hadley & McCloy LLP, special New York counsel to the
      Administrative Agent and of any local counsel retained by the
      Administrative Agent in connection with the negotiation, preparation,
      execution and delivery of this Agreement and the other Credit Documents
      and the filing, recording and registering, as applicable, of the Security
      Documents, to the extent that invoices therefor have been delivered to the
      Company not later than two Business Days prior to the Effective Date, and
      (B) all filing, recording and registration fees and taxes incurred in
      connection with respect to the Liens provided for by the Security
      Documents.

            (o) Tax Sharing Agreement. (i) A certified copy of the Tax Sharing
      Agreement, certified as a true, accurate and complete copy thereof by a
      Financial Officer of the Lead Borrower, and evidence that the Tax Sharing
      Agreement is in a form and substance satisfactory to the Lenders and (ii)
      a certificate of the Secretary or an Assistant Secretary of each Person
      that is a party to the Tax Sharing Agreement (other than ISP) certifying
      as to resolutions approving the Tax Sharing Agreement, incumbency of
      officers and specimen signatures, in form and substance satisfactory to
      the Administrative Agent (without duplication of the same condition with
      respect to Chemco under clause (d) above).

                               Credit Agreement
<PAGE>
                                      -72-

            (p) Management Agreement. A certified copy of the Management
      Agreement, certified as a true, accurate and complete copy thereof by a
      Senior Officer or a Financial Officer of each Obligor that is a party
      thereto, and evidence that the Management Agreement is in a form and
      substance satisfactory to the Lenders.

            (q) Financial Statements. (i) Consolidated balance sheets of the
      Chemco Consolidated Group as at each of December 31, 1999 and December 31,
      2000 and the related consolidated statements of income, shareholder's
      equity and cash flow of the Chemco Consolidated Group for the Fiscal Year
      ended on each said date, with the opinion thereon of Arthur Andersen LLP,
      (ii) the unaudited consolidated balance sheets of the Chemco Consolidated
      Group as at April 1, 2001 and the related consolidated statements of
      income, shareholder's equity and cash flow of the Chemco Consolidated
      Group for the three-month period ended on such date and (iii) pro forma
      consolidated balance sheets of the Chemco Consolidated Group as at April
      1, 2001 and the related consolidated statements of income and cash flow of
      the Chemco Consolidated Group for the twelve-month period ended on said
      date, the year ended December 31, 2000, the three-month period ended April
      1, 2001, and the three-month period ended April 2, 2000.

            (r) Other Documents. Such other documents as the Administrative
      Agent or any Lender or special New York counsel to the Administrative
      Agent may reasonably request.

            The Administrative Agent shall notify the Lead Borrower and the
Lenders of the Effective Date, and such notice shall be conclusive and binding.
Notwithstanding the foregoing, the obligations of the Lenders to make Loans and
of the LC Bank to issue and continue Letters of Credit hereunder shall not
become effective unless each of the foregoing conditions is satisfied (or waived
pursuant to Section 9.02) on or prior to 3:00 p.m., New York City time, on July
10, 2001 (and, in the event such conditions are not so satisfied or waived, the
Commitments shall terminate at such time). Each of the Lenders hereby agree that
the Administrative Agent may assume (solely for its benefit) that such Lender is
satisfied with (i) the form and substance of each of the documents referred to
in clauses (b), (c), (i), (o) and (p) above and (ii) the results of such
Lender's review under clause (k) above unless such Lender shall have delivered
to the Administrative Agent no later than 10:00 a.m., New York City time, on the
Effective Date, written notice that it is not satisfied with any matter covered
by such provisions.

            Section 5.02. Each Credit Event. The obligation of each Lender to
make each Loan, and of the LC Bank to issue, amend, renew or extend each Letter
of Credit, is additionally subject to the satisfaction of the following
conditions:

            (a) the representations and warranties of the Obligors set forth in
      this Agreement (including Sections 4.02 and 4.03), and of each Obligor in
      each of the other Credit Documents to which it is a party, shall be true
      and correct on and as of the date of such Loan or the date of issuance,
      amendment, renewal or extension of such Letter of Credit, as applicable;
      and

            (b) at the time of and immediately after giving effect to such Loan
      or the issuance, amendment, renewal or extension of such Letter of Credit,
      as applicable, no Default shall have occurred and be continuing;

                               Credit Agreement
<PAGE>
                                   -73-

Each Borrowing and each issuance, amendment, renewal or extension of a Letter of
Credit shall be deemed to constitute a representation and warranty by the
Obligors on the date thereof as to the matters specified in the preceding
sentence.

                  Section 5.03. Each Special Collateral Release. The obligation
of the Administrative Agent to release to the Borrowers any Collateral from the
Collateral Account in connection with a Special Collateral Release Request (the
"Current Request") is subject to the satisfaction of the following conditions
(and the proviso set forth in the final sentence of Section 4.05 of the Pledge
and Security Agreement):

                  (a) the amount requested to be released in the Current
         Request, together with the aggregate amount of all other Special
         Collateral Releases occurring on or prior to the date of such Current
         Release shall not exceed the sum of all Special Reserve Amounts
         deposited to the Collateral Account by the Borrowers on or prior to
         such date;

                  (b) at the time of and immediately after giving effect to such
         release of cash Collateral, no Event of Default shall have occurred and
         be continuing (provided that this condition shall not apply with
         respect to a Special Collateral Release proposed to occur on the Final
         Settlement Date of a Disposition if, in connection with such Special
         Collateral Release, the Lead Borrower shall have instructed the
         Administrative Agent by proper notice to prepay the Loans (and/or
         provide cover for LC Exposure), pursuant to Sections 2.10(b)(vi) and
         2.10(d), in an amount equal to the amount of such Special Collateral
         Release);

                  (c) the proceeds of such Special Collateral Release will be
         used to finance one or more acquisitions or for Capital Expenditures,
         or to prepay the Loans and/or provide cover for LC Exposure as
         specified in Section 2.05(k), as specified in the Current Request; and

                  (d) if the proceeds of such Special Collateral Release will be
         used to prepay Loans (and/or provide cover for LC Exposure) of any
         Class for which Commitments remain in effect, the Lead Borrower shall
         deliver to the Administrative Agent a proper notice pursuant to Section
         2.08(c) requesting that such Commitments be permanently reduced by the
         amount of such prepayment (and/or provision of cover for LC Exposure).

Each Special Collateral Release shall be deemed to constitute a representation
and warranty by the Obligors on the date thereof as to the matters specified in
clause (a), (b) and (c) in the preceding sentence.

                                   ARTICLE VI

                                    COVENANTS

                  Each of the Borrowers covenants and agrees with the Lenders,
the LC Bank and the Administrative Agent that, so long as any Commitment, any
Loan or any LC Exposure is outstanding and until payment in full of all amounts
payable by the Borrowers hereunder:

                                Credit Agreement
<PAGE>
                                      -74-

                  Section 6.01. Information. Chemco and, to the extent provided
below, each other Obligor shall deliver to each of the Lenders and the
Administrative Agent:

                  (a) as soon as available and in any event within 50 days after
         the end of each of the first three Fiscal Quarters of each Fiscal Year,
         consolidated statements of earnings and cash flow of the members of
         Chemco Consolidated Group for such period and for the period from the
         beginning of the respective Fiscal Year to the end of such quarter, and
         the related consolidated balance sheets as at the end of such quarter,
         setting forth in each case in comparative form the corresponding
         figures for the corresponding date or period in the preceding Fiscal
         Year, accompanied by a certificate of the Lead Borrower signed by a
         Financial Officer, which certificate shall state that said financial
         statements fairly present the consolidated financial condition and
         results of operations of the members of the Chemco Consolidated Group
         in accordance with GAAP, as at the end of, and for, such period
         (subject to normal year-end audit adjustments and to the absence of
         footnote disclosures and, in the case of Unrestricted Entities, to
         Section 1.04(d));

                  (b) as soon as available and in any event within 95 days after
         the end of each Fiscal Year, consolidated statements of earnings and
         cash flow of the members of the Chemco Consolidated Group and the
         related consolidated balance sheets as at the end of such Fiscal Year,
         setting forth in each case in comparative form the corresponding
         figures as of the end of and for the preceding Fiscal Year, accompanied
         by a certificate of the Lead Borrower signed by a Financial Officer,
         which certificate shall state that said financial statements fairly
         present the consolidated financial condition and results of operations
         of the members of the Chemco Consolidated Group in accordance with GAAP
         as at the end of, and for, such period, an opinion thereon of
         independent certified public accountants of recognized national
         standing, which opinion shall state that said consolidated financial
         statements fairly present the consolidated financial condition and
         results of operations of the Chemco Consolidated Group as at the end
         of, and for, such Fiscal Year in accordance with GAAP (subject, in the
         case of Unrestricted Entities, to Section 1.04(d)), and a certificate
         of such accountants stating that, in making the examination necessary
         for their opinion, they obtained no knowledge, except as specifically
         stated, of any Default or Event of Default continuing as of the date of
         such certificate;

                  (c) as soon as available and in any event within 95 days after
         the end of each Fiscal Year, commencing with the Fiscal Year ending in
         2001, unaudited statements of earnings of each of the Borrowers and the
         related unaudited balance sheets as at the end of such Fiscal Year,
         setting forth in each case in comparative form the corresponding
         figures as of the end of and for the preceding Fiscal Year, accompanied
         by a certificate of each Borrower signed by a Financial Officer, which
         certificate shall state that said financial statements fairly present
         the financial condition and results of operations of such Borrower in
         accordance with GAAP (unless otherwise disclosed to the Lenders in
         writing at the time of delivery thereof in the manner described in
         Section 1.04(b)) as at the end of, and for, such period (subject, in
         the case of Unrestricted Entities, to Section 1.04(d));

                  (d) at the time it furnishes each set of financial statements
         pursuant to clause (c) above for any Fiscal Year, unaudited statements
         of earnings of each Unrestricted Entity for such Fiscal Year and the
         related balance sheet of such Unrestricted Entity as at the end of such
         Fiscal Year, setting forth in each case in comparative form the
         corresponding

                                Credit Agreement
<PAGE>
                                      -75-

         figures as of the end of and for the preceding Fiscal Year, accompanied
         by a certificate of the Lead Borrower signed by a Financial Officer,
         which certificate shall state that said financial statements fairly
         present the financial condition and results of operations of such
         Unrestricted Entity in accordance with GAAP as at the end of, and for,
         such Fiscal Year;

                  (e) as soon as possible, and in any event within ten days
         after an officer of any Borrower or any ERISA Affiliate knows of the
         occurrence of any ERISA Event that, alone or together with any other
         ERISA Events that have occurred, could reasonably be expected to result
         in liability of the Borrower and its Subsidiaries in an aggregate
         amount exceeding $10,000,000, notice furnished by such Borrower, signed
         by a Financial Officer, of such ERISA Event describing the same in
         reasonable detail and describing the steps being taken to remedy the
         same;

                  (f) promptly after any officer of any member of the Chemco
         Group knows that (i) any Default has occurred or (ii) any
         representation, warranty or certification made or deemed made in any
         Credit Document by any Obligor or the Lead Borrower, or any certificate
         furnished by any Obligor or the Lead Borrower to any Lender or the
         Administrative Agent pursuant to the provisions thereof, was false or
         misleading in any material respect as of the time made, deemed made or
         furnished, notice furnished by Lead Borrower, signed by a Financial
         Officer, of such Default or false or misleading representation,
         warranty, certification or certificate (as the case may be) describing
         the same in reasonable detail and describing the steps being taken to
         remedy the same;

                  (g) promptly upon their becoming available, copies of all
         registration statements and regular periodic reports, if any (other
         than with respect to employee benefit plans), which Chemco or any of
         its Subsidiaries shall have filed with the SEC or any national
         securities exchange;

                  (h) as soon as possible, and in any event within ten days,
         after either Moody's or Standard & Poor's shall have publicly announced
         any change in its rating of any of the senior secured or unsecured
         long-term debt of one or more of the Borrowers, notice thereof
         specifying the nature of such change; and

                  (i) at the time it furnishes each set of financial statements
         pursuant to clause (a) or (b) above, a certificate of the Lead Borrower
         signed by a Financial Officer setting forth in reasonable detail the
         computations necessary to determine whether the Borrowers are in
         compliance with Sections 6.06(e), 6.07, 6.09, 6.10, 6.11 and 6.12 as of
         the end of the respective Fiscal Quarter or Fiscal Year; and promptly
         (and in any event no later than 12:00 noon, New York City time, on the
         second Business Day) after the request of the Administrative Agent with
         respect to a Determination Date, a certificate of the Lead Borrower
         signed by a Financial Officer setting forth in reasonable detail the
         computations necessary to determine whether the Borrowers are in
         compliance with Sections 6.06(e), 6.07, 6.09, 6.10, 6.11 and 6.12 as at
         such Determination Date;

                  (j) at the time it furnishes each set of financial statements
         pursuant to clause (a) or (b) above, a certificate of the Lead Borrower
         signed by a Financial Officer setting forth: (i) the amount or
         outstanding book value (as applicable) of any Restricted Payment, of
         any Investment in an Unrestricted Entity or Foreign Subsidiary, of any

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<PAGE>
                                      -76-

         Investment under Section 6.07(e) made by any member of the Chemco Group
         or of each Subsidiary designated as an Unrestricted Entity (or for
         which such designation is withdrawn), in each case during such Fiscal
         Quarter; the Available Distribution Amount as at the last day of such
         Fiscal Quarter; the amount of any reduction in the outstanding book
         value of any Investment made pursuant to Section 6.07(b), (e), (f) or
         (i); the date of the making such Restricted Payment or Investment or of
         the Disposition reducing the outstanding book value of any Investment
         made pursuant to Section 6.07(b), (e), (f) or (i); the provision hereof
         (including Section reference) on which such Obligor has relied for
         purposes of making the Restricted Payment or Investment; and, in
         reasonable detail, the computations necessary to determine whether the
         Borrowers are in compliance such provision hereof; and

                  (k) promptly as possible from time to time such other
         information regarding (A) the business, affairs, operations or
         condition (financial or otherwise) of any member of the Chemco Group,
         (B) compliance by any Obligor with its obligations under any Credit
         Document and (C) such other matters relating to the transactions
         contemplated hereby, in each case as any Lender or the Administrative
         Agent may reasonably request.

The Lead Borrower will furnish to each Lender and the Administrative Agent, at
the time it furnishes each set of financial statements pursuant to clause (a) or
(b) above, a certificate of the Lead Borrower signed by a Financial Officer to
the effect that no Default has occurred and is continuing (or, if any Default
has occurred and is continuing, describing the same in reasonable detail and
describing the steps being taken to remedy the same).

                  Section 6.02. Litigation, Etc. The Borrowers shall promptly
give to each Lender notice of: (a) all legal or arbitral proceedings, and of all
proceedings by or before any Governmental Authority, and any material
development (including any settlement) in respect of such legal or other
proceedings, affecting any of Chemco and the Restricted Subsidiaries which, if
adversely determined, is reasonably likely to result in a Material Adverse
Effect; and (b) the issuance by any Governmental Authority of any injunction,
order or other restraint prohibiting, or having the effect of prohibiting or
delaying, the making of Loans, the issuance of Letters of Credit or the
consummation of any of the transactions contemplated by any of the Credit
Documents to which any Obligor is a party, or the institution of any litigation
or similar proceedings seeking any such injunction, order or other restraint.

                  Section 6.03. Corporate Existence, Etc. The Obligors shall,
and shall cause each of the other Restricted Subsidiaries to:

                  (a) preserve and maintain its corporate existence and all of
         its rights, privileges and franchises, except (i) as otherwise
         permitted by Section 6.08, (ii) in the case of any Restricted
         Subsidiary other than the Borrowers and with respect to the
         preservation and maintenance of such Restricted Subsidiary's corporate
         existence, where the failure to preserve and maintain the same could
         not reasonably be expected to have a Material Adverse Effect, and (iii)
         with respect to the preservation and maintenance of rights, privileges
         and franchises, where the failure to preserve and maintain the same
         could not reasonably be expected to have a Material Adverse Effect;

                  (b) conduct its management, business and affairs, and maintain
         its books and records, in such manner so that each member of the Chemco
         Consolidated Group will be

                                Credit Agreement
<PAGE>
                                      -77-

         treated as a corporate entity distinct from all Persons that are not
         members of the Chemco Consolidated Group and the properties of each
         member of the Chemco Consolidated Group will be readily identifiable as
         belonging to it distinct from the properties belonging to any Person
         that is not a member of the Chemco Consolidated Group (and, in any
         event, maintain its deposit accounts separate and distinct from the
         deposit accounts of any Person that is not a member of the Chemco
         Consolidated Group);

                  (c) comply with the requirements of all applicable laws,
         rules, regulations and orders of Governmental Authorities (including
         Environmental Laws then in effect) and material contractual obligations
         insofar as failure to comply with such requirements would result in a
         Material Adverse Effect;

                  (d) pay and discharge when due (or, in the case of real
         property taxes, before delinquent) all taxes, assessments and
         governmental charges or levies imposed on it or on its income or
         profits or on any of its property and (subject to the provisions
         hereof, including Sections 6.17, 6.19 and 6.20) material contractual
         obligations, except for any such tax, assessment, charge, levy or other
         obligation the payment of which is being contested in good faith and by
         proper proceedings and against which adequate reserves are being
         maintained;

                  (e) maintain all of its properties owned or used in its
         business in good working order and condition, ordinary wear and tear
         excepted and except where the failure to maintain such properties could
         not reasonably be expected to have a Material Adverse Effect; and

                  (f) permit representatives of any Lender or the Administrative
         Agent, during normal business hours, on reasonable notice, to examine,
         copy and make extracts from its books and records, to inspect its
         properties, and to discuss its business and affairs with its officers,
         all to the extent reasonably requested by such Lender or the
         Administrative Agent (as the case may be).

                  Section 6.04. Insurance. The Obligors shall, and shall cause
each of the other Restricted Subsidiaries to, keep insured all property of a
character usually insured by corporations engaged in the same or similar
business similarly situated against loss or damage of the kinds and in the
amounts customarily insured against by such corporations and carry such other
insurance as is usually carried by such corporations. Such insurance shall be
written by insurance companies selected by the Borrowers that (a) in the case of
any such companies that are organized under the laws of the United Kingdom or
are Affiliates of Chemco or members of the Chemco Group, are reputable and
financially sound, and (b) in any other case, have an A.M. Best rating of "A" or
better and are in a financial-size category of VI or larger. The Borrowers and
the other Restricted Subsidiaries shall not self-insure, except to the extent
that such self-insurance is in accordance with approved practices of
corporations similarly situated and adequate insurance reserves are maintained.
For purposes of determining whether the amount of self-insurance is in
accordance with such approved practices, any insurance written by Affiliates of
Chemco or members of the Chemco Group shall be deemed to be self-insurance.

                                Credit Agreement
<PAGE>
                                      -78-

                  Section 6.05. Use of Proceeds.

                  (a) The Borrowers shall use the proceeds of the Loans solely
(i) to refinance Indebtedness under the Existing Credit Agreement on the
Effective Date, (ii) in the case of Loans constituting a Special Borrowing,
solely to finance one or more acquisitions or for Capital Expenditures, or to
prepay Term Loans and (iii) for other general corporate purposes. The Borrowers
shall use the proceeds of Loans in compliance with applicable legal and
regulatory requirements, including Regulations U and X of the Board and the
Securities Act of 1933 and the Securities Exchange Act of 1934 and the
regulations thereunder. No part of the proceeds of the Loans shall be used in
violation of Regulation X.

                  (b) The Borrowers shall use the net proceeds received from the
issuance of the Required Senior Subordinated Debt solely to redeem or otherwise
retire the ISP 2002 Notes and after the redemption or other retirement of the
ISP 2002 Notes in full, for general corporate purposes.

                  Section 6.06. Indebtedness. The Obligors shall not, and shall
not permit any of the other Restricted Subsidiaries to, contract, create, incur,
assume or suffer to exist any Indebtedness, other than the following
Indebtedness (provided that, on the date of incurrence of such Indebtedness, and
after giving effect thereto, no Default shall have occurred and be continuing):

                  (a) Indebtedness existing on Effective Date and set forth in
         Part A of Schedule II, or to the extent not meeting the minimum
         threshold for required listing on Schedule II pursuant to Section 4.12,
         in an aggregate amount not exceeding $1,000,000, and any refinancings
         or refundings thereof, so long as the principal amount of any such
         Indebtedness refinanced or refunded is not increased from the principal
         amount thereof, and the terms and conditions thereof are made no more
         restrictive than those in effect with respect to such Indebtedness, as
         of the date hereof;

                  (b) Indebtedness under this Agreement and the other Credit
         Documents;

                  (c) the Required Senior Subordinated Debt;

                  (d) Qualified Senior Subordinated Debt in an aggregate
         outstanding principal amount not exceeding $324,500,000, but only if on
         the date of incurrence of such Indebtedness, and after giving effect
         thereto, the Borrowers shall have been in compliance with Section
         6.11(b) by a margin of not less than 0.25 to 1, provided that the Lead
         Borrower shall have furnished to the Administrative Agent a certificate
         signed by a Financial Officer of the Lead Borrower setting forth in
         reasonable detail the computations necessary to confirm such
         compliance;

                  (e) non-recourse Indebtedness in an aggregate outstanding
         principal amount, together with the imputed principal amount of Capital
         Lease Obligations, not exceeding $25,000,000, secured by Liens referred
         to in Section 6.09(h), but only if in each case the aggregate amount of
         consideration paid (and/or the aggregate fair market value of any
         property transferred) by any of the members of the Chemco Group in
         connection with the incurrence of such Indebtedness in such case shall
         not have exceeded 20% of the aggregate fair market value of all
         property subject to the Lien securing such Indebtedness

                                Credit Agreement
<PAGE>
                                      -79-

         in such case (determined at the time of incurrence of such
         Indebtedness) and any extensions, renewals and refinancings of such
         Indebtedness;

                  (f) Indebtedness in an aggregate outstanding principal amount
         not exceeding $25,000,000, in respect of industrial revenue bonds and
         other tax advantaged financings, other than Special Acquisition Debt;

                  (g) Guarantees of any member of the Chemco Consolidated Group
         in favor of any Lender in respect of Hedge Agreements, cash management
         arrangements and foreign exchange contracts entered into between Chemco
         or any of its Subsidiaries or Affiliates and any Lender;

                  (h) Indebtedness owing by any Obligor to any member of the
         Chemco Group;

                  (i) Indebtedness owing by the Foreign Subsidiaries to any of
         the Obligors to the extent permitted under Section 6.07(f) as an
         Investment of the Obligors;

                  (j) Indebtedness owing by the Foreign Subsidiaries solely to
         Persons outside the Chemco Group in an aggregate outstanding principal
         amount, together with the aggregate outstanding principal amount of all
         Indebtedness permitted under Section 6.06(a) that is also permitted
         under this clause, not exceeding $25,000,000;

                  (k) Special Acquisition Debt in an aggregate outstanding
         principal amount not exceeding $25,000,000; and

                  (l) other Indebtedness in an aggregate outstanding principal
         amount not exceeding $25,000,000.

                  Notwithstanding anything contained in this Agreement to the
contrary, the Obligors shall not, and shall not permit any of the other
Restricted Subsidiaries to, issue any Guarantee, other than the Guarantees
provided under Article III or described under Section 6.06(g), unless either the
maximum Dollar Equivalent of the obligation being guaranteed is readily
ascertainable by the terms of such obligation or the agreement or instrument
evidencing such Guarantee specifically limits the Dollar Equivalent of the
maximum exposure of the guarantor thereunder; provided that the exposure of the
guarantor in respect of fees, costs and expenses and indemnities against
liabilities of the beneficiary of such Guarantee to third parties need not be
readily ascertainable or specifically limited.

                  Section 6.07. Investments. The Obligors shall not, and shall
not permit any of the other Restricted Subsidiaries to, make or hold any
Investments in any Person, other than the following Investments:

                  (a)  Cash Equivalents;

                  (b) Investments in equity securities (other than Margin Stock
         or (except as permitted under Section 6.07(d)) capital stock or other
         equity interests in any members of the Chemco Group or any Affiliate of
         Chemco), to the extent that the aggregate outstanding book value
         thereof does not exceed $5,000,000;

                                Credit Agreement
<PAGE>
                                      -80-

                  (c)  operating deposit accounts with banks;

                  (d) Investments in Obligors or Persons that, as of the date on
         which such Investments are made, will become Subsidiary Guarantors;
         Investments by Foreign Subsidiaries in Foreign Subsidiaries or Persons
         that, as of the date on which such Investments are made, will become
         Foreign Subsidiaries; and Investments in Foreign Subsidiaries as of the
         Effective Date;

                  (e) Investments (other than Margin Stock), to the extent that,
         on the date any such Investment is made, the aggregate principal amount
         and/or outstanding book value thereof shall not exceed the Available
         Distribution Amount on such date;

                  (f) (1) Investments by the Obligors in Foreign Subsidiaries or
         Persons that, as of the date on which such Investments are made, will
         become Foreign Subsidiaries, in an aggregate outstanding principal
         amount and book value not exceeding $50,000,000, provided that each
         such Investment shall be permitted under this clause (f)(1) as an
         equity contribution in the applicable Foreign Subsidiary, as opposed to
         a loan thereto, solely to the extent (without duplication) (i) required
         under the law of the jurisdiction of organization of such Foreign
         Subsidiary governing adequacy of capital of Persons of the
         organizational form of such Foreign Subsidiary, (ii) necessary to avoid
         any significant adverse tax consequences to the Chemco Group under
         applicable law and (iii) that, in connection with the incurrence of
         Indebtedness by such Foreign Subsidiary permitted hereunder, any Person
         that will extend credit in respect of such Indebtedness (other than an
         Affiliate of Chemco) shall require as a precondition to such extension
         of credit an equity Investment in such Foreign Subsidiary; and (2)
         Investments that constitute Indebtedness owing by any Foreign
         Subsidiary to any Obligor satisfying the collateral security and other
         requirements of Section 6.22(d);

                  (g) Guarantees permitted under Section 6.06;

                  (h) Hedge Agreements entered into in the ordinary course of
         business and not for speculative purposes;

                  (i) Investments in the Linden Joint Venture, to the extent
         that the aggregate outstanding book value thereof does not exceed
         $25,000,000;

                  (j) loans to employees of any member of the Chemco
         Consolidated Group (excluding SJH) in an aggregate principal amount not
         exceeding $5,000,000 for any one such employee and $8,500,000 for all
         such employees; and

                  (k) (i) loans to ISP made from the proceeds of Required Senior
         Subordinated Debt the proceeds of which loans will be used by ISP
         solely for purposes of redeeming or otherwise retiring ISP 2002 Notes,
         in a principal amount not exceeding on any date the excess, if any, of
         $199,900,000 over the sum of the aggregate amount of all Restricted
         Payments made pursuant Section 6.10(c)(i) on or prior to that date plus
         the aggregate outstanding principal amount of all loans made pursuant
         to this clause (k)(i) as of the date of determination; and (ii) loans
         to ISP made from the proceeds of Qualified Senior Subordinated Debt the
         proceeds of which loans will be used by ISP solely for purposes of

                                Credit Agreement
<PAGE>
                                      -81-

         redeeming or otherwise retiring ISP 2003 Notes, in a principal amount
         not exceeding on any date the excess, if any, of $324,500,000 over the
         sum of the aggregate amount of all Restricted Payments made pursuant
         Section 6.10(c)(ii) plus the aggregate outstanding principal amount of
         all loans made pursuant to this clause (k)(ii) as of the of date of
         determination.

                  The Obligors shall not, and shall not permit any of the other
Restricted Subsidiaries to, take a short position in any securities of any
Person (including by means of the issuance of call options).

                  Section 6.08. Mergers, Etc. The Obligors shall not, and shall
not permit any of the other Restricted Subsidiaries to, enter into any
transaction of merger or consolidation or amalgamation, or convey, sell, lease,
sell and lease back, dispose of or otherwise transfer, in one transaction or a
series of transactions, all or substantially all of the business or property of
any Obligor and its Restricted Subsidiaries taken as a whole, except that,
notwithstanding the foregoing provisions of this Section, any of the Obligors
and the other Restricted Subsidiaries may enter into any such transaction with
another corporation, provided that:

                  (a) such transaction constitutes an Investment in an
         Unrestricted Entity or Foreign Subsidiary or the Linden Joint Venture
         permitted pursuant to Section 6.07(e), (f) or (i), as applicable; or

                  (b) all of the following shall be true: (i) if any Borrower is
         a party to such transaction, such Borrower (or any other Borrower)
         shall be the surviving corporation and such transaction shall not
         involve a Disposition of all or substantially all of the assets of such
         Borrower; (ii) if such transaction is a merger, consolidation,
         amalgamation or other corporate restructuring, the surviving
         corporation is a corporation organized and existing under the laws of
         the United States of America, a State thereof or the District of
         Columbia; (iii) if such transaction is a merger, consolidation,
         amalgamation or other corporate restructuring and the surviving
         corporation is not an Obligor, such surviving corporation expressly
         assumes, by an agreement satisfactory in form and substance to the
         Required Lenders (which agreement may require the delivery of opinions
         of counsel reasonably requested and satisfactory to the Required
         Lenders), the obligations under this Agreement (including provision of
         collateral security) and, as applicable, the other Credit Documents of
         the members of the Chemco Group that are the subject of such
         transaction; and (iv) immediately after giving effect to such
         transaction, (x) no Default shall have occurred and be continuing, (y)
         no Default would have occurred and be continuing under Section 6.11, as
         determined on the basis of pro forma financial statements in respect of
         the fiscal periods referred to in, and then applicable for determining
         compliance with, Section 6.11 as if such transaction had been
         consummated as of the first day of such Fiscal Quarter in which such
         transaction shall have occurred and (z) Adjusted Net Worth shall equal
         or exceed Adjusted Net Worth immediately prior to giving effect to such
         transaction. Upon the transfer by any other member of the Chemco
         Consolidated Group (other than a Foreign Subsidiary) of all or
         substantially all of its assets to another Person and the assumption by
         such other Person of such transferring member's obligations pursuant to
         this clause (b), unless such transferring member shall, at the time of
         such transfer, by an agreement satisfactory in form and substance to
         the Required Lenders, agree to continue to be liable for the
         performance of its obligations hereunder and under

                                Credit Agreement
<PAGE>
                                      -82-

         the other Credit Documents, if any, it shall be deemed to have been
         released from such obligations.

                  Section 6.09. Limitation on Liens. The Obligors shall not, and
shall not permit any of the other Restricted Subsidiaries to, create, incur,
assume or suffer to exist any Lien upon any of its property, whether now owned
or hereafter acquired, or assign or sell any income or revenues (including
accounts receivable) or rights in respect of any thereof, other than the
following Liens ("Permitted Liens"):

                  (a) Liens imposed by any Governmental Authority for taxes,
         assessments or charges not yet due (or, in the case of real property
         taxes, not yet delinquent) or which are being contested in good faith
         and by appropriate proceedings if adequate reserves with respect
         thereto are maintained in accordance with GAAP on the books of such
         Person, provided that enforcement of any such Lien shall be stayed
         during the period while such proceedings are pending and continuously
         for 15 days after the conclusion of such proceedings;

                  (b) carriers', warehousemen's, mechanics', materialmen's,
         repairmen's or other like Liens arising in the ordinary course of
         business which are not overdue for a period of more than 45 days or
         which are being contested in good faith and by appropriate proceedings
         if adequate reserves with respect thereto are maintained in accordance
         with GAAP on the books of such Person, provided that enforcement of any
         such Lien shall be stayed during the period while such proceedings are
         pending and continuously for 15 days after the conclusion of such
         proceedings;

                  (c) pledges or deposits under worker's compensation,
         unemployment insurance and other social security legislation;

                  (d) deposits of cash and Liens on other assets (provided that
         such Liens shall not cover any such other assets not necessary to
         enable the secured party to perform the relevant obligations of the
         debtor) to secure the performance of bids, trade contracts (other than
         for borrowed money), leases (other than capital leases), statutory
         obligations, surety and appeal bonds, performance bonds and other
         obligations of a like nature incurred in the ordinary course of
         business;

                  (e) easements, rights-of-way, licenses, restrictions on the
         use of property or minor imperfections in the title thereto which do
         not in any case materially detract from the value of the property
         subject thereto or interfere with the ordinary conduct of the business
         of any member of the Chemco Group that shall have an interest in, or in
         the conduct of its business shall use, such property;

                  (f) broker's Liens securing the payment of commissions in the
         ordinary course of business;

                  (g) Liens created pursuant to this Agreement and the Security
         Documents;

                  (h) Liens created to secure purchase money obligations and
         Capital Lease Obligations incurred in connection with the acquisition
         of the property subject to such Liens, and Liens on assets existing
         when such assets are acquired (and not imposed in

                                Credit Agreement
<PAGE>
                                      -83-

         contemplation of acquisition), to the extent such obligations are
         permitted by Section 6.06(e);

                  (i) Liens in respect of any Qualified Securitization Program;

                  (j) Liens on property on deposit in an escrow in connection
         with a Disposition that is permitted hereunder;

                  (k) Liens on the proceeds of the issuance of the Required
         Senior Subordinated Debt that are deposited in escrow pursuant to the
         Required Senior Subordinated Debt Documents and which shall be used
         solely to prepay the ISP 2002 Notes;

                  (l) Liens securing the obligations of ISP Freetown Fine
         Chemicals Inc. owing to General Electric Capital Corporation, in an
         aggregate amount not exceeding $56,050,000, under an operating lease of
         certain property located at Freetown, Massachusetts; and

                  (m) Liens existing on the Effective Date and listed on
         Schedule II, securing obligations in an aggregate amount as to all such
         Liens not exceeding $6,000,000.

                  Section 6.10. Restricted Payments. The Obligors shall not, and
shall not permit any of the other Restricted Subsidiaries to, declare or make
any Restricted Payment at any time, except that:

                  (a) any member of the Chemco Group (other than Chemco) may pay
         cash dividends on its capital stock to, or repurchase shares of capital
         stock from, any member of the Chemco Group, provided that no Obligor
         shall pay cash dividends on its capital stock to, or repurchase shares
         of capital stock from, any Foreign Subsidiary;

                  (b) Chemco may make Restricted Payments in cash, to the extent
         that, on the date any Restricted Payments are made, the aggregate
         amount of such Restricted Payments shall not exceed the Available
         Distribution Amount on such date;

                  (c) (i) Chemco may make Restricted Payments in cash from the
         proceeds of the Required Senior Subordinated Debt the proceeds of which
         Restricted Payments shall be used by ISP solely for the purpose of
         redeeming or otherwise retiring the ISP 2002 Notes, in an aggregate
         amount not exceeding on any date the excess, if any, of $199,900,000
         over the sum of the aggregate amount of all Restricted Payments made
         pursuant this clause (c)(i) on or prior to that date plus the aggregate
         principal amount of all loans made pursuant to Section 6.07(k)(i) on or
         prior to that date (whether or not outstanding on such date); and (ii)
         Chemco may make Restricted Payments in cash from the proceeds of the
         Qualified Senior Subordinated Debt the proceeds of which Restricted
         Payments shall be used by ISP solely for the purpose of redeeming or
         otherwise retiring the ISP 2003 Notes, in an aggregate amount not
         exceeding on any date the excess, if any, of $324,500,000 over the sum
         of the aggregate amount of all Restricted Payments made pursuant this
         clause (c)(ii) on or prior to that date plus the aggregate principal
         amount of all loans made pursuant to Section 6.07(k)(ii) on or prior to
         that date (whether or not outstanding on such date); and

                                Credit Agreement
<PAGE>
                                      -84-

                  (d) Chemco may make Restricted Payments in cash on any date to
         the extent of the Special Capital Balance, provided that the aggregate
         amount of all Restricted Payments made pursuant to this clause (d)
         shall not exceed $40,000,000 in any Fiscal Year;

provided that Chemco shall not make any Restricted Payment, if immediately prior
to or after giving effect to such Restricted Payment, a Default shall have
occurred and be continuing.

                  Each notice furnished under Section 6.01(j) shall, to the
extent that the information set forth therein is in compliance herewith as of
the effective date of the applicable transaction, fix the lettered clause of
this Section or Section 6.07, or Section 6.16(e), pursuant to which the
Restricted Payment, Investment or designation of an Unrestricted Subsidiary
referred to in such notice shall have been made for purposes of thereafter
determining compliance with this Section and Sections 6.07 and 6.16(e).

                  For purposes hereof, "Available Distribution Amount" means, on
any date of determination, the sum of:

                  (i)  $50,000,000, plus

                  (ii) 50% of Consolidated Net Income (as defined below) (if
         positive) of the Chemco Consolidated Group for the period commencing
         with the first Fiscal Quarter of Year 2001 through and including the
         last day of the Fiscal Quarter ending on, or most recently ended prior
         to, in such determination date (treated for these purposes as a single
         accounting period), plus

                  (iii) the aggregate amount of all equity Investments made in
         cash by any direct or indirect parent of Chemco in the capital stock of
         Chemco, including Special Capital Contributions during the period
         commencing on the date hereof and ending on and including such
         determination date, plus

                  (iv) an amount equal to 80% of the aggregate fair market value
         of all non-cash property contributed by any direct or indirect parent
         of Chemco as an Investment in the capital stock of Chemco during the
         period commencing on the date hereof and ending on and including such
         determination date, which fair market value of non-cash property in
         connection with any such Investment or series of related Investments
         shall, for purposes of this definition, be equal to the lower of the
         determination thereof pursuant to (y) a resolution adopted by the Board
         of Directors of Chemco (and at least a majority of the directors
         disinterested in such transaction), certified by the Secretary or an
         Assistant Secretary in a writing delivered to the Administrative Agent
         not less than five Business Days prior to the date of such non-cash
         Investment (or at such later date as the Administrative Agent may
         agree) and (z) a written opinion of a nationally recognized
         investment-banking firm, selected by Chemco (at its own expense), which
         shall be subject to only customary qualifications and limitations and
         shall be delivered to the Administrative Agent not less than five
         Business Days prior to the date of such non-cash Investment (or at such
         later date as the Administrative Agent may agree), provided that if the
         aggregate fair market value of such non-cash property shall not exceed
         $10,000,000 as determined pursuant to clause (y) above, such resolution
         adopted by the Board of

                                Credit Agreement
<PAGE>
                                      -85-

         Directors of Chemco shall be determinative (and no opinion of an
         investment-banking firm shall be required), plus

                  (v) an amount equal to the lesser of (i) the aggregate
         principal amount of all repayments of loans made pursuant to Section
         6.07(k)(i) during the period commencing on the date hereof and ending
         on and including such determination date and (ii) the excess, if any,
         of $199,900,000 over the aggregate amount of all Restricted Payments
         made pursuant Section 6.10(c)(i) on or prior to such determination
         date; provided that such lesser amount shall added to the sum of
         Available Distribution Amount only after the ISP 2002 Notes shall have
         been redeemed or otherwise retired in full, plus

                  (vi) an amount equal to the lesser of (i) the aggregate
         principal amount of all repayments of loans made pursuant to Section
         6.07(k)(ii) during the period commencing on the date hereof and ending
         on and including such determination date and (ii) the excess, if any,
         of $324,500,000 over the aggregate amount of all Restricted Payments
         made pursuant Section 6.10(c)(ii) on or prior to such determination
         date; provided that such lesser amount shall added to the sum of
         Available Distribution Amount only after the ISP 2003 Notes shall have
         been redeemed or otherwise retired in full, minus

                  (vii) the aggregate amount of all Restricted Payments made
         pursuant to Section 6.10(b) and (d) on or prior to such determination
         date, minus

                  (viii) the aggregate outstanding book value of all Investments
         made in Unrestricted Entities by any members of the Chemco Group
         pursuant to Section 6.07(e) on such determination date, minus

                  (ix) the aggregate outstanding book value of all Subsidiaries
         designated as Unrestricted Entities pursuant to Section 6.16(e) on such
         determination date.

                  Solely for purposes of the definition of Available
         Distribution Amount above:

                  "Consolidated Net Income" means, with respect to any Person
         for any period, the aggregate of the Net Income of such Person and its
         Restricted Subsidiaries for such Period, on a consolidated basis,
         determined in accordance with GAAP; provided that (1) the Net Income
         (but not loss) of any Person that is not a Restricted Subsidiary or
         that is accounted for by the equity method of accounting will be
         included only to the extent of the amount of dividends or distributions
         paid in cash to the specified Person or a wholly-owned Restricted
         Subsidiary of such Person; (2) the Net Income of any Restricted
         Subsidiary will be excluded to the extent that the declaration or
         payment of dividends by such Restricted Subsidiary of such Net Income
         is not at the date of determination permitted without any prior
         approval from any Governmental Authority (that has not been obtained)
         or directly or indirectly by operation of the terms of its charter or
         any agreement, instrument, judgment, decree, order, statute, rule or
         governmental regulation applicable to such Restricted Subsidiary or its
         stockholders; (3) the Net Income of any Person acquired in a pooling of
         interests transaction for any period prior to the date of such
         acquisition will be excluded; and (d) the cumulative effect of a change
         in accounting principles will be excluded; and

                                Credit Agreement
<PAGE>
                                      -86-

                  "Net Income" means, with respect to any Person for any period,
         the net income or loss of such Person determined in accordance with
         GAAP and before any reduction in respect of preferred stock dividends,
         excluding, however (1) any gain or loss, together with any related
         provision for taxes on such gain or loss, realized in connection with
         any Disposition or the extinguishment of any Indebtedness of such
         Person or any of its Restricted Subsidiaries; (2) any extraordinary
         gain or loss, together with any related provision for taxes on such
         extraordinary gain or loss; and (3) any non-recurring gain or loss,
         together with any related provision for taxes on such non-recurring
         gain or loss, relating to the Chemco Restructuring.

                  Section 6.11. Certain Financial Covenants.

                  (a) Interest Coverage Ratio. The Borrowers will not, on any
Determination Date, permit the ratio, of (i) EBITDA for the period of four
consecutive Fiscal Quarters ending on or most recently ended prior to such
Determination Date to (ii) Interest Expense during such period, to be less than
the "Applicable Ratio" specified below opposite the period below within in which
such Determination Date occurs:

                             Interest Coverage Ratio

<TABLE>
<CAPTION>
                  Period                               Applicable Ratio
                  ------                               ----------------
<S>                                                    <C>
From the date hereof through the
penultimate day of the fourth Fiscal                      2.00 to 1
Quarter of 2003, inclusive:

From the last day of the fourth Fiscal
Quarter of 2003 through the penultimate                   2.25 to 1
day of the fourth Fiscal Quarter of 2004,
inclusive:

From the last day of the fourth Fiscal
Quarter of 2004 through the penultimate                   2.50 to 1
day of the second Fiscal Quarter of 2006,
inclusive:

From the last of the second Fiscal Quarter
of 2006 and all times thereafter:                         2.75 to 1
</TABLE>

                                Credit Agreement
<PAGE>
                                      -87-

                  (b) Total Debt Leverage Maintenance Ratio. The Borrowers will
not, on any Determination Date, permit the Total Debt Leverage Maintenance Ratio
to be greater than the "Applicable Ratio" specified below opposite the period
below within in which such Determination Date occurs:

                      Total Debt Leverage Maintenance Ratio
<TABLE>
<CAPTION>
                  Period                               Applicable Ratio
                  ------                               ----------------
<S>                                                    <C>
From the date hereof through the
penultimate day of the fourth Fiscal                      4.75 to 1
Quarter of 2003, inclusive:

From the last day of the fourth Fiscal
Quarter of 2003, through the penultimate                  4.50 to 1
day of the fourth Fiscal Quarter of 2004,
inclusive:

From the last day of the fourth Fiscal
Quarter of 2004 through the penultimate                   4.25 to 1
day of the fourth Fiscal Quarter of 2005,
inclusive:

From the last day of the fourth Fiscal
Quarter of 2005 through the penultimate                   4.00 to 1
day of the second Fiscal Quarter of 2006,
inclusive:

From the last of the second Fiscal Quarter
of 2006 and all times thereafter:                         3.75 to 1
</TABLE>

                                Credit Agreement
<PAGE>
                                      -88-

                  (c) Senior Debt Leverage Maintenance Ratio. The Borrowers will
not, on any Determination Date, permit the ratio, of (i) Total Consolidated
Senior Indebtedness as of such Determination Date to (ii) EBITDA for the period
of four consecutive Fiscal Quarters ending on or most recently ended prior to
such Determination Date, to be greater than the "Applicable Ratio" specified
below opposite the period below within in which such Determination Date occurs:

                     Senior Debt Leverage Maintenance Ratio

<TABLE>
<CAPTION>
                  Period                               Applicable Ratio
                  ------                               ----------------
<S>                                                    <C>
From the date hereof through the
penultimate day of the fourth Fiscal                      3.25 to 1
Quarter of 2001, inclusive:

From the last day of the fourth Fiscal
Quarter of 2001 through the penultimate                   3.00 to 1
day of the second Fiscal Quarter of 2006,
inclusive:

From the last day of the second Fiscal
Quarter of 2006 and all times thereafter:                 2.75 to 1
</TABLE>

                  (d) Minimum Adjusted Net Worth. The Borrowers will not, on any
Determination Date, permit Adjusted Net Worth to equal less the sum of (a)
$475,000,000, plus (b) 50% of consolidated net income of each Fiscal Quarter of
the Chemco Consolidated Group for the period beginning on April 1, 2001 through
and including the last day of the Fiscal Quarter ending on, or most recently
ended prior to, such date (treated for these purposes as a single accounting
period) (but only to the extent that such consolidated net income for such
period is a positive number), minus the aggregate amount of Restricted Payments
made from proceeds of Qualified Senior Subordinated Debt pursuant to Section
6.10(c)(ii).

                  Section 6.12. Capital Expenditures. The Borrowers will not
permit the aggregate amount of Capital Expenditures to exceed the sum of (a) (i)
for Fiscal Year 2001, $75,000,000, (ii) for Fiscal Year 2002, $85,000,000 and
(iii) for each Fiscal Year after 2002, the sum of $85,000,000 plus the excess,
if any, of $85,000,000 for each prior Fiscal Year commencing with Fiscal Year
2002 over the aggregate amount of Capital Expenditures for each such prior
Fiscal Year, plus (b) the aggregate amount of the Net Available Proceeds
(without regard to clauses III and IV of the definition thereof as set forth in
Section 1.01) received by the members of the Chemco Group in connection with all
prior Dispositions (whether or not Excluded Dispositions) occurring prior to the
date of determination.

                  Section 6.13. Linden Property.

                  (a) The Obligors shall not, and shall not permit any of the
other Restricted Subsidiaries or the Unrestricted Entities (other than the
Linden Joint Venture) to conduct, directly or indirectly, any business at the
Linden Property, unless (x) the purpose of such business is not primarily
related to the treatment, storage, disposal or any other form of management of
hazardous wastes (other than incidentally in furtherance of the primary business

                                Credit Agreement
<PAGE>
                                      -89-

purpose) and (y) the Obligors shall deliver to the Administrative Agent such
real property Security Documents with respect to the Linden Property for
purposes of, among other things, creating a Lien in favor of the Administrative
Agent to secure the Secured Obligations, as the Administrative Agent shall
reasonably request (including the items and documents of the type described in
subparagraph (i) through (v) of Section 6.22(c)), in form and substance
satisfactory to the Administrative Agent, prior to the earlier of any member of
the Chemco Group incurring any Capital Expenditures in excess of $5,000,000 in
furtherance of such business and any such member commencing such business at the
Linden Property, unless the requirements of this clause (y) are waived by the
Required Lenders.

                  (b) The Borrowers will ensure that the Linden Joint Venture
will (subject to the immediately following sentence of this clause) be
adequately capitalized and will not be a member of the Chemco Consolidated Group
and that all requirements necessary to maintain the separate corporate identity
and existence of the Linden Joint Venture (including that (i) neither the chief
executive officer, the chief operating officer nor the general manager (or
individual holding a comparable position) shall hold an office of Senior Vice
President or higher of any member of the Chemco Consolidated Group and (ii)
separate books and records for such Person shall be maintained. No member of the
Chemco Consolidated Group will provide any Guarantee, indemnity or other
Investment or financial support to the Linden Joint Venture (other than
Investments permitted by Section 6.07(e) and (i) and in respect of environmental
obligations relating to periods prior to the creation of such entity, and no
member of the Chemco Consolidated Group may become liable in respect of
environmental obligations payable as a result of the formation of the Linden
Joint Venture, except for any such obligations payable under the administrative
consent orders dated June 16, 1989 and June 28, 1990 issued by the New Jersey
Department of Environmental Protection and Energy relating to the Linden
Property. No member of the Chemco Consolidated Group will have any direct or
contingent liability in respect of the Linden Joint Venture's operations,
properties, liabilities or capitalization (subject to the exceptions contained
in the preceding sentence).

                  Section 6.14. Lines of Business. The Borrowers shall, and
shall cause the other members of the Chemco Group taken as a whole to, remain
principally engaged in the business or businesses conducted by the Chemco Group
as of the date hereof; provided that this Section shall not be deemed to
prohibit any transaction otherwise specifically permitted under this Agreement;
provided further that Chemco shall not engage in any business other than the
making of Investments in its Subsidiaries, the services that the Credit
Documents contemplate will be performed by Chemco and matters incidental
thereto.

                  Section 6.15. Transactions with Affiliates. The Obligors shall
not, and shall not permit any of the other Restricted Subsidiaries to, directly
or indirectly, enter into any transaction with an Affiliate of Chemco, except
that any member of the Chemco Consolidated Group may enter into a transaction
with an Affiliate thereof:

                  (a) expressly provided for under the Tax Sharing Agreement or
         the Management Agreement;

                  (b) that is in the ordinary course of business and is on terms
         and conditions that are at least as favorable to the Chemco
         Consolidated Group as would be obtainable in a comparable arm's-length
         transaction with a Person other than an Affiliate;

                                Credit Agreement
<PAGE>
                                      -90-

                  (c) that is a transaction with a Close Affiliate (as defined
         below), which together with all related transactions subject to this
         Section, does not involve (i) a Disposition of property of the Chemco
         Consolidated Group the aggregate book value or fair market value of
         which (whichever is higher), when taken together with all amounts
         described in clause (ii) below arising in connection with such
         transactions, exceeds $10,000,000, or (ii) the incurrence of
         obligations or liabilities, direct or indirect and whether or not
         contingent, the aggregate cost of performing which and the aggregate
         amount of which may exceed $10,000,000, provided that, in the case of
         this clause (c), (A) such transaction and all related transactions are
         (1) on terms and conditions that are at least as favorable to Chemco
         Consolidated Group as would be obtainable in a comparable arm's-length
         transaction with a Person other than an Affiliate and (2) fair from a
         financial point of view to the members of the Chemco Consolidated Group
         that are parties thereto; and (B) the Lead Borrower shall have
         delivered to the Administrative Agent, at least two Business Days prior
         to the consummation of a transaction in compliance with this clause
         (c), a certificate of the Secretary or an Assistant Secretary of Chemco
         or, if Chemco is not then acting as Lead Borrower, of each Borrower
         certifying that its Board of Directors (and at least a majority of the
         directors disinterested in such transaction) has determined, by
         adoption of one or more resolutions attached to such certificate, that
         such transaction complies with the foregoing clause (A); or

                  (d) if (i) such transaction is a transaction with a Close
         Affiliate and all related transactions are (A) on terms and conditions
         that are at least as favorable to the Chemco Consolidated Group as
         would be obtainable in a comparable arm's-length transaction with a
         Person other than an Affiliate, and (B) fair from a financial point of
         view to the members of the Chemco Consolidated Group that are parties
         thereto; and (ii) the Lead Borrower shall have delivered to the
         Administrative Agent, at least five Business Days prior to the
         consummation of a transaction in compliance with this clause (d), (A) a
         certificate of the Secretary or an Assistant Secretary of Chemco or, if
         Chemco is not then acting as Lead Borrower, of each Borrower certifying
         that its Board of Directors (and at least a majority of the directors
         disinterested in such transaction) has determined, by adoption of one
         or more resolutions attached to such certificate, that such transaction
         complies with clause (i) above; and (B) the written opinion of a
         nationally recognized investment-banking firm selected by and at the
         expense of the Borrowers, subject only to customary qualifications and
         limitations, stating that, in the opinion of such firm, such
         transaction and all related transactions comply with clause (i)(B)
         above.

                  For purposes of this Section, "Close Affiliate" means any
Person directly or indirectly controlling or controlled by or under direct or
indirect common control with Chemco; and for purposes of this definition,
"control," as used with respect to any Person, means the possession, directly or
indirectly, of the power to direct or cause the direction of the management or
policies of such Person, whether through the ownership of voting securities, by
agreement or otherwise, and the terms "controlling," "controlled by" and "under
common control with" have correlative meanings.

                  Section 6.16. Additional Subsidiaries.

                  (a) Subsidiary Guarantors. The Borrowers will take such
action, and will cause each Subsidiary (other than the Borrowers, ISP Funding,
any Foreign Subsidiary and any Unrestricted Entity) to take such action, from
time to time as shall be necessary to ensure that

                                Credit Agreement
<PAGE>
                                      -91-

such Subsidiary is a "Subsidiary Guarantor" hereunder. Without limiting the
generality of the foregoing, in the event that the Borrowers or any of their
Subsidiaries (other than any Unrestricted Entities) shall form or acquire any
new Subsidiary that shall constitute a Restricted Subsidiary other than a
Foreign Subsidiary, or in the event that the Lead Borrower shall withdraw the
designation of an Unrestricted Entity in accordance with Section 6.16(e), the
Borrowers and their Subsidiaries will cause such new Subsidiary or former
Unrestricted Entity, as the case may be, to:

                  (i) become a "Subsidiary Guarantor" hereunder, and an
         "Obligor" under the Pledge and Security Agreement pursuant to a
         Guarantee Assumption Agreement;

                  (ii) cause such Subsidiary to take such action as shall be
         necessary or (in the opinion of the Administrative Agent) reasonably
         desirable to create and perfect valid and enforceable first priority
         Liens on the property of such Subsidiary that, pursuant to Section
         6.22, is required to be granted as collateral security for the
         obligations of such Subsidiary hereunder (including executing and
         delivering such Security Documents as the Administrative Agent shall
         request, in each case in form and substance satisfactory to the
         Administrative Agent (including in such form as is necessary or
         desirable to file, record or register, as applicable) and all
         documentary Collateral provided for under such Security Document);

                  (iii) cause such Subsidiary to enter into the Tax Sharing
         Agreement as contemplated thereby (and furnish to the Administrative
         Agent evidence thereof satisfactory to the Agent); and

                  (iv) deliver such proof of corporate action, incumbency of
         officers, opinions of counsel and other documents as is consistent with
         those delivered by each Obligor pursuant to Section 5.01 on the
         Effective Date or as the Administrative Agent shall have requested.

                  (b) Ownership of Subsidiaries. Each of the Obligors will, and
will cause each of the other Restricted Subsidiaries to, take such action from
time to time as shall be necessary to ensure that each of its Subsidiaries is a
wholly owned direct or indirect Subsidiary and that such Subsidiary shall not
authorize and issue any capital stock, including any preferred class of capital
stock, other than for sale or other transfer to another member of the Chemco
Consolidated Group.

                  (c) Unrestricted Entities. Any Subsidiary of Chemco that shall
Guarantee the Indebtedness of any Obligor (including the Required Senior
Subordinated Debt and the Qualified Senior Subordinated Debt), or that shall be
co-liable with an Obligor with respect to any Indebtedness, shall not be
designated by the Lead Borrower as an Unrestricted Entity, and such Subsidiary
shall be deemed a Restricted Subsidiary for all purposes hereof and, if not a
Foreign Subsidiary, shall be made a Subsidiary Guarantor hereunder pursuant to
Section 6.16(a), unless the Administrative Agent (with the consent of the
Required Lenders) shall waive such requirement.

                  (d) Further Assurances. The Obligors will, and will cause each
of the other Subsidiaries to, take such action from time to time as shall
reasonably be requested by the

                                Credit Agreement
<PAGE>
                                      -92-

Administrative Agent to effectuate the purposes and objectives of this
Agreement.

                  (e) Designations. The Lead Borrower may from time to time,
subject to the terms and conditions hereof, by delivering a written notice to
the Administrative Agent on or before the date of such designation designate any
one or more of its Subsidiaries (other than the Borrowers) as Unrestricted
Entities and/or withdraw the designation of any Subsidiary as an Unrestricted
Entity. Any such notice shall (i) in the case of the designation of an
Unrestricted Entity, specify all Subsidiaries of any Subsidiary so designated
and, upon any such designation, all Subsidiaries thereof shall also be deemed to
have been designated as Unrestricted Entity, (ii) certify that, as of the date
of and immediately after giving effect to such designation or withdrawal of a
designation, no Default shall have occurred and be continuing, (iii) state the
date as of which such designation or withdrawal of a designation shall take
effect and (iv) in the case of the designation of an Unrestricted Entity,
certify that, the aggregate book value of such designated Subsidiary and its
Subsidiaries shall not exceed the Available Distribution Amount on the effective
date of such designation. Any designation or withdrawal of a designation shall
become effective as of the date specified in such notice only if: (1) on such
date, no Default shall have occurred and be continuing or shall result therefrom
(and for purposes of determining compliance with Section 6.11, any designation
of a Subsidiary as an Unrestricted Entity shall be deemed to be effective as of
the first day of the Fiscal Quarter in which designation occurs and any
withdrawal of a designation of an Unrestricted Entity as such shall be deemed to
have been effective as of the first day of the Fiscal Quarter immediately
following the Fiscal Quarter in which such withdrawal occurs); (2) in the case
of a withdrawal of a designation of an Unrestricted Entity, such Unrestricted
Entity shall have become a Subsidiary Guarantor hereunder pursuant to clause (a)
above, shall have granted a Lien in its properties to the Administrative Agent
pursuant to Section 6.22 and delivered such legal opinions and other documents
to the Administrative Agent, in form and substance acceptable to it; in the case
of a designation of a Subsidiary as an Unrestricted Entity, such Subsidiary
shall meet the definition of "Unrestricted Entity" set forth in Section 1.01;
and (4) each event or circumstance relating to such Unrestricted Entity that
occurred or existed while such Unrestricted Entity was an Unrestricted Entity
and that would have constituted a Default if such Unrestricted Entity had been a
member of the Chemco Consolidated Group shall have been remedied or shall no
longer exist. The Lead Borrower may not withdraw the designation of a Subsidiary
as an Unrestricted Entity if, after giving effect to such withdrawal and all
related withdrawals to take effect on the same date, such Subsidiary would
continue to be a Subsidiary of an Unrestricted Entity, and the Lead Borrower may
not designate a Subsidiary as an Unrestricted Entity if such Subsidiary had
theretofore been an Unrestricted Entity.

                  Section 6.17. Amendments to Other Documents. The Obligors
shall not, and shall not permit any of the other Restricted Subsidiaries to,
amend, restate, supplement, waive or otherwise modify, or consent to any
amendment, restatement, supplement, waiver or other modification of, any
Required Senior Subordinated Debt Document, the Qualified Senior Subordinated
Debt Document, the Management Agreement, the Tax Sharing Agreement or any LC
Reimbursement Agreement, or any provision of the foregoing, without the prior
written consent of the Administrative Agent (with the approval of the Required
Lenders); provided that any member of the Chemco Group may, without the consent
of the Administrative Agent, amend, restate, supplement, waive or otherwise
modify the Tax Sharing Agreement (other than Paragraph 13 thereof or any other
provision thereof to the extent that it affects such Paragraph 13) or Management
Agreement to the extent that any such amendment, restatement, supplement,

                                Credit Agreement
<PAGE>
                                      -93-

waiver or other modification does not provide for a Restricted Payment, complies
with the requirements of Section 6.15, and, only as to the Tax Sharing
Agreement, does not have a material adverse effect on the Consolidated Chemco
Group taken as a whole.

                  Section 6.18. No Unfriendly Acquisitions. The Obligors shall
not, and shall not permit any of the other Subsidiaries to, make any purchase,
directly or indirectly, individually or as part of a group (within the meaning
of Section 13(d) of the Securities Exchange Act of 1934), in one transaction or
a series of transactions, of (i) a majority of the outstanding Voting Stock of
any Person, or (ii) more than 10% but less than a majority of the Voting Stock
of any Person, unless (x) in the case of either of the preceding clauses (i) and
(ii), prior to such acquisition at least a majority of the directors of such
Person (excluding directors that are Affiliates of ISP or are directors,
officers or employees of any member of the Chemco Group or any Restricted
Subsidiary or Affiliate of Chemco) shall have consented to such acquisition or
(y) in the case of the preceding clause (ii), any member of the Chemco Group on
such date shall be holding such stock for the purpose of investment and without
the intent of exercising control over the management or policies of such Person.

                  Section 6.19. Restrictive Agreements. The Obligors shall not,
and shall not permit any of the other Restricted Subsidiaries to, directly or
indirectly, enter into, incur or permit to exist any agreement or other
arrangement that prohibits, restricts or imposes any condition upon (a) the
ability of any member of the Chemco Group to create, incur or permit to exist
any Lien upon any of its property or assets, or (b) the ability of any
Subsidiary of the Borrowers to pay dividends or other distributions with respect
to any shares of its capital stock or to make or repay loans or advances to the
Borrowers or any other Subsidiary or to Guarantee Indebtedness of the Borrowers
or any other Subsidiary; provided that:

                  (i) the foregoing shall not apply to (y) restrictions and
         conditions imposed by law or this Agreement, or by any Capital Lease
         Obligations or purchase money security interest permitted hereunder
         solely with respect to the property subject to such Capital Lease
         Obligations or purchase money security interest, and (z) customary
         restrictions and conditions contained in agreements relating to the
         sale of a Subsidiary pending such sale, provided such restrictions and
         conditions apply only to the Subsidiary that is to be sold and such
         sale is permitted hereunder; and

                  (ii) clause (a) of the foregoing shall not apply to (x)
         restrictions or conditions imposed by any agreement relating to secured
         Indebtedness permitted by this Agreement if such restrictions or
         conditions apply only to the property or assets securing such
         Indebtedness and (y) customary provisions in leases and other contracts
         restricting the assignment thereof.

                  Section 6.20. Purchase or Redemption of Subordinate
Indebtedness. The Obligors shall not, and shall not permit any of the other
Restricted Subsidiaries to, purchase, redeem, retire or otherwise acquire for
value, or set apart any money for a sinking, defeasance or other analogous fund
for the purchase, redemption, retirement or other acquisition of, or make any
voluntary payment or prepayment of the principal of or interest on, or any other
amount owing in respect of any Required Senior Subordinated Debt or Qualified
Senior Subordinated Debt, except for regularly scheduled payments of principal
and interest in respect thereof required pursuant to the instruments and other
documents evidencing such Indebtedness.

                                Credit Agreement
<PAGE>
                                      -94-

                  Section 6.21. Certain Matters Regarding Dispositions. The
Obligors shall not, and shall not permit any of the other Restricted
Subsidiaries to, enter into any transaction that constitutes a Disposition or
otherwise effect a Disposition (other than Excluded Dispositions), unless:

                  (a) the consideration that the applicable members of the
         Chemco Group shall be entitled to receive, and/or direct delivery of,
         in connection with such Disposition shall have been determined to be
         the fair market value of the property of such members of the Chemco
         Group subject to such Disposition by the applicable Boards of Directors
         of such members of the Chemco Group and such determination is certified
         by the Secretary or an Assistant Secretary of each of such member of
         the Chemco Group in a certificate delivered to the Administrative Agent
         not less than five Business Days prior to the time of such Disposition;

                  (b) other than Dispositions described in clauses (a) and (b)
         of the definition of "Excluded Dispositions", and clause (III) of the
         definition of "Net Available Proceeds", set forth in Section 1.01, at
         least 75% of the total consideration to be received, and/or delivered
         as directed, by the members of the Chemco Group in connection with such
         Disposition shall be cash or cash-equivalent consideration; provided
         that the percentage of the total consideration to be so received and/or
         delivered in the form of cash or cash-equivalents in connection with a
         Disposition may be less than 75% to the extent that (i) a member of the
         Chemco Group actually receives such other consideration and such
         receipt of property constitutes an acquisition or an Investment
         permitted hereunder at such time or (ii) an Unrestricted Entity
         actually receives (at the direction of a member the Chemco Group) such
         other consideration and such receipt of property constitutes a capital
         contribution by such member of the Chemco Group in such Unrestricted
         Entity that is permitted as an Investment under Section 6.07, the book
         value or principal amount of which shall be at least equal to the
         non-cash and cash equivalent consideration so contributed at such time;

                  (c) all of the consideration that any members of the Chemco
         Group shall be entitled to receive, and/or direct delivery of, in
         connection with such Disposition shall be received at the time of the
         consummation of the Disposition of any property by the member of the
         Chemco Group; and

                  (d) all cash and cash equivalent consideration that any member
         of the Chemco Group receives in connection with such Disposition shall
         be deposited in the Collateral Account on the date received by such
         member of the Chemco Group.

                  Section 6.22. Collateral Security.

                  (a) Each of the Obligors will, subject to each of the other
lettered paragraphs of this Section, on the Effective Date and continuously
thereafter at their expense, (i) create and maintain a valid and enforceable
first-priority Lien, free and clear of all other Liens, in and to all of the
Mortgaged Properties, and on the fixtures and personal property (tangible and
intangible) of the Obligors existing on the Effective Date and thereafter
arising and/or acquired, including intellectual property, accounts, general
intangibles, goods (including inventory and equipment), claims against ISP
Funding and securities (including the capital stock that any Obligor holds,
directly or indirectly, in any of the Subsidiaries of Chemco, including ISP
Funding), (ii) perfect

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<PAGE>
                                      -95-

such Lien under applicable law through the execution and delivery by the
Obligors of all necessary and reasonably desirable Security Documents (in form
and substance satisfactory to the Administrative Agent) and (iii) file, record
and register, as applicable, such Security Documents with all necessary and (and
in the opinion of the Administrative Agent) reasonably desirable offices,
except:

                  (i) to the extent of Permitted Liens on the Collateral;

                  (ii) to the extent that the Administrative Agent shall
         determine in its sole discretion that the costs of creating such a Lien
         on any such property (or perfecting any Lien created in its favor
         therein or clearing any such adverse claim) are excessive in relation
         to the value of the collateral security to be afforded thereby;

                  (iii) to the extent that any Intellectual Property (as such
         term is defined in the Pledge and Security Agreement) would be rendered
         invalid, abandoned, void or unenforceable by reason of its being
         included as part of the Collateral or is subject to a provision that
         restricts the assignment thereof that is enforceable under applicable
         law and the applicable Obligor is unable after using its best efforts
         (as determined by the Administrative Agent in its sole discretion) to
         obtain a waiver of such provision by the beneficiary thereof;

                  (iv) the Belleville Property and (except to the extent
         provided in Section 6.13(a)) the Linden Property;

                  (v) accounts receivable originated by any Obligor in
         connection with the sale or lease of inventory or the rendering of
         services in the ordinary course of business which are subject to sale
         to ISP Funding in connection with a Qualified Securitization Program
         and the proceeds thereof; and

                  (vi) 34% of the shares of each class of capital stock of any
         Foreign Subsidiary held by an Obligor, directly or (other than through
         another Foreign Subsidiary) indirectly and 100% of the shares of
         capital stock of any Foreign Subsidiary held by an Obligor indirectly
         through another Foreign Subsidiary.

                  (b) (i) In connection with each Disposition permitted
         hereunder or under any of the other Credit Documents, upon the request
         of the Lead Borrower, the Administrative Agent shall promptly (A)
         release its Lien on such property, without any recourse or warranty or
         representation whatsoever, (B) deliver to the Lead Borrower any
         documentary Collateral that is the subject of such Disposition and (C)
         execute and deliver to the Lead Borrower such Uniform Commercial Code
         release statements, mortgage releases and other instruments and
         documents as may be prepared by the Lead Borrower or the other Obligors
         that are reasonably required to effect the release of the Liens on the
         Collateral that is the subject of such Disposition, provided that at
         the time of such Disposition and the release of the Lien by the
         Administrative Agent, the Administrative Agent shall have obtained,
         through the efforts and at the expense of the Obligors, (y) a
         first-priority perfected security interest in the proceeds of such
         released Collateral and (z) in the reasonable discretion of the
         Administrative Agent, legal opinions (from counsel acceptable to it)
         addressed to the Lenders, the LC Bank and the Administrative Agent,

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<PAGE>
                                      -96-

         covering such matters relating to the Lien of the Administrative Agent
         in such proceeds as it may reasonably request.

                  (ii) In connection with the designation of an Unrestricted
         Entity in accordance with Section 6.16(e), the Administrative Agent
         shall promptly (A) release its Lien on all property of such
         Unrestricted Entity, without any recourse or warranty or representation
         whatsoever, (B) deliver to the Lead Borrower any documentary Collateral
         of such Unrestricted Entity and (C) execute and deliver to the Lead
         Borrower such Uniform Commercial Code release statements, mortgage
         releases and other instruments and documents as may be prepared by the
         Lead Borrower or such Unrestricted Entity that are reasonably required
         to effect the release of the Liens on the Collateral of such
         Unrestricted Entity.

                  (c) The Obligors shall cause to be delivered to the
Administrative Agent not later than 90 days (or such shorter period as
specifically set forth below) after the Effective Date (all of which shall be in
form, scope and substance reasonably satisfactory to the Administrative Agent):

                  (i) with respect to the Closing Date Mortgaged Properties, one
         or more policies of title insurance issued by the Title Company, in
         ALTA, extended coverage, Lender's Fee Policy form 1970 (revised
         10/17/84) or such other form approved by the Administrative Agent, or a
         binding marked commitment to issue such policy or policies, insuring
         the Administrative Agent for the benefit of itself, the LC Bank and the
         Lenders, in the amounts set forth on Schedule VII for the Closing Date
         Mortgaged Properties, insuring that the relevant Obligor is lawfully
         seized and possessed of a fee simple interest in the Closing Date
         Mortgaged Properties, and also insuring the validity and priority of
         the Liens created under the real property Security Documents with
         respect thereto, subject only to Permitted Liens; each such title
         policy shall contain: (A) full coverage against mechanics' liens (filed
         and inchoate), (B) a reference to the relevant survey with no survey
         exceptions except those theretofore approved by the Administrative
         Agent and (C) such affirmative insurance and endorsements as the
         Administrative Agent may reasonably require; and each such title policy
         shall be accompanied by such reinsurance agreements between the Title
         Company and such other title companies that shall have been approved by
         the Administrative Agent, in ALTA Facultative Reinsurance Agreement
         9/24/94 form or, in relation to any real property located in Texas, its
         equivalent, in each case, as the Administrative Agent may require;

                  (ii) as-built metes and bounds surveys of recent date of each
         facility comprising a Closing Date Mortgaged Property, including
         easements that benefit such facility, to be covered by the real
         property Security Documents, showing such matters as may be required by
         the Administrative Agent, which surveys shall be made in accordance
         with the "Minimum Standard Detail Requirements for ALTA/ACSM Land Title
         Surveys" jointly established and adopted by ALTA, ACSM and NSPS in 1999
         with all measurements made in accordance with the "Minimum Angle,
         Distance and Closure Requirements for Survey Measurements Which Control
         Land Boundaries for ALTA/ACSM Land Title Surveys" or such other form
         and content that have been approved by the Administrative Agent and
         which contain "Optional Survey Responsibilities and Specifications" 1,
         2, 3, 6, 7(a), 7(b), 7(c), 8, 9, 10, 11(b), 13, 14, 15 and 16 as
         specified on Table A to the "Minimum Standard Detail Requirements for

                                Credit Agreement

<PAGE>
                                      -97-

         ALTA/ACSM Land Title Surveys" and certified to the Administrative
         Agent, the LC Bank and the Lenders and the Title Company, such
         certificate to be in a form reasonably acceptable to the Administrative
         Agent, and shall have been prepared by a registered surveyor acceptable
         to the Administrative Agent;

                  (iii) certified copies of permanent and unconditional
         certificates of occupancy (or, if it is not the practice to issue
         certificates of occupancy in a jurisdiction in which any Mortgaged
         Property is located, then such other evidence reasonably satisfactory
         to the Administrative Agent) permitting the fully functioning operation
         and occupancy of each Mortgaged Property and of such other permits
         necessary for the use and operation of each such facility issued by the
         respective Governmental Authorities having jurisdiction over each such
         facility, provided that to the extent that the Obligors are unable,
         after using commercially reasonable efforts during the 90-day period
         following the Effective Date, to deliver such items to the
         Administrative Agent within such period, such items not delivered by
         the end of such period shall not be required to be delivered pursuant
         to this clause (iii);

                  (iv) evidence that the Borrowers shall have paid to the Title
         Company all expenses and premiums of the Title Company in connection
         with the issuance of such policies with respect to the Closing Date
         Mortgaged Properties and in addition shall have paid to the Title
         Company an amount equal to the recording and stamp taxes payable in
         connection with recording the applicable real property Security
         Documents in the appropriate county land office(s); and

                  (v) such Security Documents, or amendments or supplements to
         such Security Documents, relating to the Closing Date Mortgaged
         Properties as the Administrative Agent shall request, duly executed and
         delivered by each Obligor and other Person intended to be a party
         thereto, in each case in form and substance satisfactory to special New
         York counsel to the Administrative Agent (including in form necessary
         or desirable to file, record or register, as applicable), together with
         such favorable written opinions (addressed to the Administrative Agent,
         the LC Bank and the Lenders) of such counsel (reasonably acceptable to
         the Administrative Agent) to the applicable Obligors for each
         jurisdiction the law of which governs the creation, perfection and
         priority of each Lien provided for by the Security Documents (or
         amendments or supplements thereto) required to be delivered by this
         clause (v), in each case covering such matters relating to the
         Obligors, the Security Documents and the Liens provided for by the
         Security Documents as shall be reasonably requested by the
         Administrative Agent, the LC Bank, the Lenders and special New York
         counsel to the Administrative Agent (and each Obligor hereby instructs
         such counsel to deliver such opinion to the Administrative Agent, the
         LC Bank and the Lenders).

                  (vi) the documents listed below for each Post-closing
         Mortgaged Property:

                           (A) any consents or other documents that are required
                  as a condition in order to create and maintain a valid and
                  enforceable Lien on such property, provided that to the extent
                  that the Obligors are unable, after using commercially
                  reasonable efforts during the 90-day period following the
                  Effective Date, to obtain such consents and other documents
                  within such period with respect to any Post-

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<PAGE>
                                      -98-

                  closing Mortgaged Property, then such property shall no longer
                  be a Post-closing Mortgaged Property;

                           (B) within 15 days of the date (each, a "Consent
                  Date") that all consents and other documents, if any, required
                  by clause (A) above have been obtained with respect to such
                  Post-closing Mortgaged Property (it being understood and
                  agreed that the Consent Date for any such property shall be
                  the Effective Date if no such consents or documents are
                  required), such Security Documents as the Administrative Agent
                  shall request with respect to such Post-closing Mortgaged
                  Property, duly executed and delivered by each Obligor and
                  other Person intended to be a party thereto, in each case in
                  form and substance satisfactory to special New York counsel to
                  the Administrative Agent (including in form necessary or
                  desirable to file, record or register, as applicable),
                  provided that any leasehold Security Document shall not limit
                  the Obligor's right to terminate such leasehold interest upon
                  reasonable prior notice to the Administrative Agent;

                           (C) within 90 days of the applicable Consent Date, a
                  policy of title insurance issued by the Title Company, in the
                  same form, scope and substance as described in Section
                  6.22(c)(i) with respect to such Post-closing Mortgaged
                  Property, in an amount equal to at least 110% of the fair
                  market value of such property as certified by the Lead
                  Borrower to the Administrative Agent, together with evidence
                  that the Borrowers shall have paid to the Title Company all
                  expenses and premiums of the Title Company in connection with
                  the issuance of such policy and in addition shall have paid to
                  the Title Company an amount equal to the recording and stamp
                  taxes payable in connection with recording the applicable real
                  property Security Documents in the appropriate county land
                  office(s); and

                           (D) within 90 days of the applicable Consent Date, an
                  as-built metes and bounds survey of recent date in the same
                  form, scope and substance as described in Section 6.22(c)(ii),
                  with respect to such Post-closing Mortgaged Property.

                  (d) Any loan (each a "subject loan") by an Obligor to a
Foreign Subsidiary shall satisfy the collateral security and other requirements
of this clause (d) if each of the following conditions shall be satisfied (and
in the case of clauses (i), (ii) and (iii), shall be satisfied continuously):
(i) the subject loan shall be secured by a valid and enforceable first-priority
Lien, free and clear of all other Liens, in and to all of the real property,
fixtures and personal property (tangible and intangible) of such Foreign
Subsidiary; (ii) all or substantially all of such collateral security is located
in a jurisdiction reasonably satisfactory to the Administrative Agent, including
with respect to the ability of a secured party to enforce a Lien and realize
upon the collateral security in such jurisdiction; (iii) such Foreign Subsidiary
shall have no Investments in any other Foreign Subsidiary or Unrestricted
Entity, other than (y) Investments in such Persons outstanding on the date of
the subject loan that were not made in contemplation or connection with the
subject loan and (z) any loans to such other Foreign Subsidiary which
independently satisfy the requirements of this clause (d); and (iv) the receipt
by the Administrative Agent of favorable written opinions (addressed to the
Administrative Agent, the LC Bank and the Lenders of counsel to the Obligor and
the Foreign Subsidiary (reasonably acceptable to the Administrative Agent) for
each jurisdiction the law of which governs the creation, perfection or priority
of such Lien, covering such matters as shall be reasonably requested by, and in
form and

                                Credit Agreement
<PAGE>
                                      -99-

substance satisfactory to, and subject to exceptions customarily taken by legal
counsel in such jurisdiction to the extent reasonably acceptable to, the
Administrative Agent (and such Obligor and the Foreign Subsidiary shall instruct
such counsel to deliver such opinions to the Administrative Agent, the LC Bank
and the Lenders).

                  (e) The Obligors shall (i) deliver to the Administrative
Agent, within 10 days after the Effective Date, stock certificates representing
all of the capital stock of each Obligor (other than the capital stock of
Chemco) and (ii) use commercially reasonable efforts to cause to be delivered to
the Administrative Agent, as soon as possible after the Effective Date, the
stock certificates representing 66% of each class of capital stock of each
Foreign Subsidiary held, directly or (other than through another Foreign
Subsidiary) indirectly, by each Obligor (and shall continue such efforts until
such time as all such stock certificates shall have been so delivered), in each
case duly endorsed in blank or accompanied by undated stock powers duly executed
in blank and in form and substance reasonably satisfactory to the Administrative
Agent.

                  (f) The Obligors shall deliver to the Administrative Agent, as
soon as possible after the Effective Date, such Security Documents, as shall be
reasonably requested by the Administrative Agent, to create and perfect a Lien
in favor of the Administrative Agent in the two vessels used by ISP Alginates
Inc. for kelp harvesting off the coast of San Diego, California, unless under
applicable United States law the Obligors are prohibited from granting the
Administrative Agent a Lien in such vessels.

                  (g) Within 30 days after the Effective Date, the Obligors
shall cause to be delivered to the Administrative Agent (i) opinions addressed
to Lenders, the LC Bank and the Administrative Agent of local counsel
(reasonably acceptable to the Administrative Agent) for each jurisdiction the
law of which governs the perfection and/or priority of each Lien provided for by
the Security Documents, in each case covering such matters relating to the
Obligors, the Security Documents, the Liens provided for by the Security
Documents, as shall be reasonably requested by, and in form and substance
satisfactory to, the Administrative Agent (and each applicable Obligor hereby
instructs such counsel to deliver such opinion to the Administrative Agent, the
LC Bank and the Lenders) and (ii) such Security Documents as such local counsel
shall determine are necessary or reasonably desirable to perfect or otherwise
protect the Lien of the Administrative Agent in the collateral security.

                  (h) Within 30 days after the Effective Date or the date of
delivery of the stock certificates described in clause (e)(ii) above, and in any
event to the extent requested by the Administrative Agent, the Obligors shall
use commercially reasonable efforts to cause to be delivered to the
Administrative Agent (and shall continue such efforts until such time as all of
the following items have been so delivered) (i) opinions addressed to Lenders,
the LC Bank and the Administrative Agent of foreign counsel (reasonably
acceptable to the Administrative Agent) for any foreign jurisdiction the law of
which governs the organization of a Foreign Subsidiary (the capital stock of
which is required to be part of the Collateral), in each case covering such
matters relating to the Obligors, the Security Documents, the Liens in such
collateral stock provided for by the Security Documents (including enforcement,
perfection and priority thereof under the law of such jurisdiction), as shall be
reasonably requested by, and in form and substance satisfactory to, and subject
to exceptions customarily taken by legal counsel in such jurisdiction to the
extent reasonably acceptable to, the Administrative Agent, (and each applicable
Obligor hereby instructs such counsel to deliver such opinion to the
Administrative Agent, the LC Bank and the Lenders) and (ii) such Security
Documents as such foreign counsel

                                Credit Agreement
<PAGE>
                                     -100-

shall determine are necessary or reasonably desirable to create, enforce,
perfect or otherwise protect the Lien of the Administrative Agent in such
capital stock).

                                  ARTICLE VII

                                EVENTS OF DEFAULT

                  If any of the following events (herein called "Events of
Default") shall occur:

                  (a) the Borrowers shall: (i) default in the payment of any
         principal of any Loan or any reimbursement obligation in respect of any
         LC Disbursement when due (whether at stated maturity or at mandatory or
         optional prepayment); or (ii) default in the payment of any interest on
         any Loan or on any reimbursement obligation in respect of any LC
         Disbursement, any fee or any other amount payable by them hereunder or
         under any other Credit Document when due and such default shall have
         continued unremedied for three or more Business Days; or

                  (b) either of the following shall occur: (i) any member of the
         Chemco Group shall default in the payment when due of (A) any principal
         of or interest on other Indebtedness the aggregate principal amount of
         which has a Dollar Equivalent of $10,000,000 or more, or (B) any amount
         owing by it under any Hedge Agreement or Hedge Agreements relating to
         interest payments, where the aggregate amount of the net liability of
         such member thereunder upon the termination thereof would be an amount
         having a Dollar Equivalent of $10,000,000 or more, and any grace period
         with respect thereto (without giving effect to any extension or waiver
         thereof) shall expire, or (ii) any event specified in (A) any note,
         agreement, indenture or other document evidencing or relating to other
         Indebtedness of any member of the Chemco Group the aggregate principal
         amount of which has a Dollar Equivalent of $10,000,000 or more or (B)
         any Hedge Agreement or Hedge Agreements entered into by any member of
         the Chemco Group relating to interest payments, where the aggregate
         amount of the net liability of such member thereunder upon the
         termination thereof would be an amount having a Dollar Equivalent of
         $10,000,000 or more, if the effect of such event (after giving effect
         to any grace periods with respect thereto (but without giving effect to
         any extension or waiver of any such grace periods)) is (1) in the case
         of any such Indebtedness, to cause, or to permit the holder or holders
         of such Indebtedness (or a trustee or agent on behalf of such holder or
         holders) to cause such Indebtedness, (x) to become due, or (y) to be
         prepaid in full (whether by redemption, purchase, offer to purchase or
         otherwise), prior to its stated maturity, or (2) in the case of any
         such Hedge Agreement, to permit the payments owing under such Hedge
         Agreement to be liquidated (it being understood and agreed that this
         paragraph (b) shall not be deemed to apply to any voluntary prepayment,
         redemption, purchase or offer to purchase any Indebtedness or to any
         prepayment, redemption, purchase or offer to purchase any Indebtedness
         required as a result of a voluntary sale of property); or

                  (c) any representation, warranty or certification made or
         deemed made herein or in any other Credit Document (or in any
         amendment, restatement, supplement or modification hereto or thereto)
         by any Obligor, or any certificate furnished to any Lender or the
         Administrative Agent pursuant to the provisions hereof or thereof,
         shall prove to

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<PAGE>
                                     -101-

         have been false or misleading in any material respect as of the time
         made, deemed made or furnished; or

                  (d) (i) any of the Obligors (as applicable) shall default (A)
         in the performance of any of its obligations under any of Section
         6.01(f) or (i), 6.05, 6.06, 6.07, 6.08, 6.09 (other than by reason of
         the creation of a non-consensual Lien), 6.10, 6.11(a), 6.12, 6.14,
         6.15, 6.16, 6.17, 6.18, 6.19, 6.20 and 6.22; or (B) in the performance
         of its obligations under Section 6.01(k) or 6.11(b), (c) or (d) and
         such default shall continue for a period at least 15 days; or (ii) any
         Obligor shall default in the performance of any of its other
         obligations in this Agreement or any other Credit Document (including
         under Section 6.09, to the extent excluded from clause (A) above), and
         such default shall continue unremedied for a period of at least 30 days
         after notice thereof to the Lead Borrower by the Administrative Agent
         or any Lender (through the Administrative Agent); or

                  (e) any of Chemco, ISP and their respective Subsidiaries shall
         admit in writing it inability to, or be generally unable to, pay its
         debts as such debts become due; or

                  (f) any of Chemco, ISP and their respective Subsidiaries shall
         (i) apply for or consent to the appointment of, or the taking of
         possession by, a receiver, custodian, trustee, examiner or liquidator
         or the like of itself or of all or a substantial part of its property,
         (ii) make a general assignment for the benefit of its creditors, (iii)
         commence a voluntary case under the Bankruptcy Code, (iv) file a
         petition seeking to take advantage of any other law relating to
         bankruptcy, insolvency, reorganization, liquidation, dissolution,
         arrangement or winding-up, or composition or readjustment of debts, (v)
         fail to controvert in a timely and appropriate manner, or acquiesce in
         writing to, any petition filed against it in an involuntary case under
         the Bankruptcy Code or (vi) take any corporate action for the purpose
         of effecting any of the foregoing; or

                  (g) a proceeding or case shall be commenced, without the
         application or consent of the affected member of the Chemco Group, in
         any court of competent jurisdiction, seeking (i) its reorganization,
         liquidation, dissolution, arrangement or winding-up, or the composition
         or readjustment of its debts, (ii) the appointment of a receiver,
         custodian, trustee, examiner, liquidator or the like of such member or
         of all or any substantial part of its property, or (iii) similar relief
         in respect of such member under any law relating to bankruptcy,
         insolvency, reorganization, winding-up, or composition or readjustment
         of debts, and such proceeding or case shall continue undismissed, or an
         order, judgment or decree approving or ordering any of the foregoing
         shall be entered and continue unstayed and in effect, for a period of
         60 or more days; or an order for relief against any such member shall
         be entered in an involuntary case under the Bankruptcy Code; or

                  (h) a final judgment or judgments for the payment of money in
         excess of $5,000,000 in the aggregate shall be rendered by one or more
         courts, administrative tribunals or other bodies having jurisdiction
         against any member of the Chemco Group and the same shall not be
         discharged (or provision shall not be made for such discharge), or a
         stay of execution thereof shall not be procured, within 30 days from
         the date of entry thereof and such member shall not, within said period
         of 30 days, or such longer period during which execution of the same
         shall have been stayed, appeal therefrom and cause the execution
         thereof to be stayed during such appeal; or

                                Credit Agreement
<PAGE>
                                     -102-

                  (i) an ERISA Event shall have occurred that, when taken
         together with all other ERISA Events that have occurred, singly or in
         the aggregate, could be reasonably likely to have a Material Adverse
         Effect; or

                  (j) one or more courts, administrative tribunals or other
         bodies having jurisdiction against any member of the Chemco Group shall
         have finally determined (after all permitted appeals) that a member of
         the Chemco Group is liable in respect of claims or liabilities, whether
         accrued, absolute or contingent, based on or arising from the
         generation, storage, transport, handling or disposal of Hazardous
         Materials by any such member or any Affiliate of any thereof, or any
         predecessor in interest of any such member or Affiliate, or relating to
         any site or facility owned, operated or leased by any such member or
         Affiliate, and the amount of such claims or liabilities, or the cost of
         remediation in connection therewith (insofar as they are payable by any
         such member but after deducting any portion thereof which is reasonably
         expected to be paid by other creditworthy Persons jointly and severally
         liable therefor), is, singly or in the aggregate, reasonably likely to
         have a Material Adverse Effect; or

                  (k) any of the following shall occur: (i) Continuing Directors
         shall cease to constitute a majority of the Board of Directors of ISP,
         (ii) any Person or group of related Persons (within the meaning of
         Section 13(d) of the Securities Exchange Act of 1934) other than SJH
         shall, on any date, control, directly or indirectly, at least as much
         of the Voting Stock of ISP as is owned, directly or indirectly, by SJH
         on such date, (iii) SJH, directly or indirectly, shall, on any date,
         own less than 25% of the Voting Stock of ISP outstanding on such date,
         and any other Person or group of related Persons (within the meaning of
         Section 13(d) of the Securities Exchange Act of 1934) shall, on such
         date, control, directly or indirectly, more than one half of the Voting
         Stock of ISP owned, directly or indirectly, by SJH on such date, (iv)
         SJH shall, on any date, cease to own, directly or indirectly, at least
         10% of the Voting Stock of ISP outstanding on such date or (v) ISP
         shall, on any date, cease to own, directly or indirectly, 100% of the
         capital stock of Chemco, except for up to five percent of the shares of
         any class of Chemco capital stock held by employees thereof (other than
         SJH), or option contracts as to which Chemco is the counterparty to
         purchase up to such per centum of shares, pursuant to any employee
         compensation or incentive plan of Chemco, provided that Chemco shall be
         entitled at any time to purchase such shares from, or pay the "in the
         money amount" of such of such option contracts (in complete discharge
         of its obligations thereunder) to, such employees at a pre-specified
         sale or strike price; or

                  (l) any of the Security Documents, Article 3 and the
         subordination provisions of any of the Required Subordinated Debt
         Documents and the Qualified Subordinated Debt Documents shall for
         whatever reason be terminated or cease to be in full force and effect
         (other than the expiration thereof in accordance with its terms), or
         the enforceability thereof shall be contested by any Obligor, or (in
         the case of the subordination provisions of the Required Subordinated
         Debt Documents or the Qualified Subordinated Debt Documents) any
         trustee or common agent of the holders, of such Indebtedness; or

                  (m) the Liens created by the Security Documents shall at any
         time not constitute a valid and perfected Lien on the Collateral
         intended to be covered thereby (to the extent

                                Credit Agreement
<PAGE>
                                     -103-

         perfection by filing, registration, recordation or possession is
         required herein or therein) in favor of the Administrative Agent, free
         and clear of all Liens other than Permitted Liens; or

                  (n) a cessation or suspension of all or substantially all of
         the operations of the Specialty Chemicals Business shall occur and (in
         the case of a suspension) shall continue for three consecutive Business
         Days; or

                  (o) both of the following shall occur: (i) ISP and the
         Subsidiaries of ISP shall cease to be members of the same consolidated
         group for federal income tax purposes, and (ii) Chemco or any of its
         Subsidiaries shall have, under the Tax Sharing Agreement or otherwise,
         paid any taxes that arise as a result of and are directly attributable
         to such cessation; or

                  (p) any principal or other amounts in respect of the Required
         Senior Subordinated Debt or the Qualified Senior Subordinated Debt
         shall be due and payable (whether by acceleration or otherwise), other
         than accrued and unpaid interest on the regularly scheduled interest
         payment dates therefor;

                  THEREUPON: (1) in each case of the occurrence of an Event of
Default, other than one referred to in clause (f) or (g) of this Article, and at
any time thereafter during the continuance of such Event of Default, (A) the
Administrative Agent may and, upon request of the Required Lenders shall, by
notice to the Lead Borrower, terminate the Commitments and they shall thereupon
terminate and (B) the Administrative Agent may and, upon request of the Required
Lenders (assuming, for purposes of determining Required Lenders, that all
Commitments have been terminated) shall, by notice to the Lead Borrower declare
the principal amount then outstanding of, and the accrued interest on, the
Loans, the reimbursement obligations in respect of LC Disbursements and all
other amounts payable by the Obligors hereunder (including any amounts payable
under Section 2.14, 2.15 or 2.16) to be forthwith due and payable, whereupon
such amounts shall be immediately due and payable without presentment, demand,
protest or other formalities of any kind, all of which are hereby expressly
waived by each Obligor; (2) in the case of the occurrence of an Event of Default
referred to in clause (p) of this Article at any time when any holder of
Required Senior Subordinated Debt or Qualified Senior Subordinated Debt (or the
trustee or common agent of the holders of either such Indebtedness) shall not be
prohibited from receiving or otherwise realizing any payment in respect of such
Indebtedness, the Commitments shall automatically be terminated and the
principal amount then outstanding of, and the accrued interest on, the Loans,
the reimbursement obligations in respect of LC Disbursements and all other
amounts payable by the Obligors hereunder and under the Notes (including any
amounts payable under Section 2.14, 2.15 or 2.16) shall automatically become
immediately due and payable without presentment, demand, protest or other
formalities of any kind, all of which are hereby expressly waived by each
Obligor (if not already accelerated and due and payable pursuant to clause (1)
above); and (3) in the case of the occurrence of an Event of Default referred to
in clause (f) or (g) of this Article, the Commitments shall automatically be
terminated and the principal amount then outstanding of, and the accrued
interest on, the Loans, the reimbursement obligations in respect of LC
Disbursements and all other amounts payable by the Obligors hereunder and under
the Notes (including any amounts payable under Section 2.14, 2.15 or 2.16) shall
automatically become immediately due and payable without presentment, demand,
protest or other formalities of any kind, all of which are

                                Credit Agreement
<PAGE>
                                     -104-

hereby expressly waived by each Obligor. In addition, upon the occurrence and
during the continuance of any Event of Default (if the principal amount then
outstanding of, and accrued interest on, the Loans and all other amounts payable
by the Borrowers hereunder and under the Notes have become due and payable as
provided above in this paragraph), the Borrowers agree that they shall, upon
request to the Lead Borrower by the Administrative Agent or the Required Lenders
(and, in the case of any Event of Default referred to in clause (f) or (g) of
this Article, forthwith, without any demand or the taking of any other action by
the Administrative Agent or such Lenders) provide cover for all LC Exposure
pursuant to Section 2.05(k).

                                  ARTICLE VIII

                            THE ADMINISTRATIVE AGENT

                  Section 8.01. Generally.

                  Each of the Lenders and the LC Bank hereby irrevocably
appoints the Administrative Agent as its agent hereunder and under the other
Credit Documents and authorizes the Administrative Agent to take such actions on
its behalf and to exercise such powers as are delegated to the Administrative
Agent by the terms hereof or thereof, together with such actions and powers as
are reasonably incidental thereto.

                  The Person serving as the Administrative Agent hereunder shall
have the same rights and powers in its capacity as a Lender as any other Lender
and may exercise the same as though it were not the Administrative Agent, and
such Person and its Affiliates may accept deposits from, lend money to and
generally engage in any kind of business with Chemco or any Subsidiary or other
Affiliate thereof (including any of the Obligors) as if it were not the
Administrative Agent hereunder.

                  The Administrative Agent shall not have any duties or
obligations except those expressly set forth herein and in the other Credit
Documents. Without limiting the generality of the foregoing, (a) the
Administrative Agent shall not be subject to any fiduciary or other implied
duties, regardless of whether a Default has occurred and is continuing, (b) the
Administrative Agent shall not have any duty to take any discretionary action or
exercise any discretionary powers, except discretionary rights and powers
expressly contemplated hereby or by the other Credit Documents that the
Administrative Agent is required to exercise in writing by the Required Lenders,
and (c) except as expressly set forth herein and in the other Credit Documents,
the Administrative Agent shall not have any duty to disclose, and shall not be
liable for the failure to disclose, any information relating to Chemco or any of
its Subsidiaries (including the Obligors) that is communicated to or obtained by
the bank serving as Administrative Agent or any of its Affiliates in any
capacity. The Administrative Agent shall not be liable for any action taken or
not taken by it with the consent or at the request of the Required Lenders or in
the absence of its own gross negligence or willful misconduct. The
Administrative Agent shall be deemed not to have knowledge of any Default unless
and until written notice thereof is given to the Administrative Agent by the
Lead Borrower or a Lender, and the Administrative Agent shall not be responsible
for or have any duty to ascertain or inquire into (i) any statement, warranty or
representation made in or in connection with this Agreement or any other Credit
Document, (ii) the contents of any certificate, report or other document
delivered hereunder or thereunder or in connection herewith or therewith, (iii)
the performance

                                Credit Agreement
<PAGE>
                                     -105-

or observance of any of the covenants, agreements or other terms or conditions
set forth herein or therein, (iv) the validity, enforceability, effectiveness or
genuineness of this Agreement, any other Credit Document or any other agreement,
instrument or document, or (v) the satisfaction of any condition set forth in
Article V or elsewhere herein or therein, other than to confirm receipt of items
expressly required to be delivered to the Administrative Agent.

                  The Administrative Agent shall be entitled to rely upon, and
shall not incur any liability for relying upon, any notice, request,
certificate, consent, statement, instrument, document or other writing believed
by it to be genuine and to have been signed or sent by the proper Person. The
Administrative Agent also may rely upon any statement made to it orally or by
telephone and believed by it to be made by the proper Person, and shall not
incur any liability for relying thereon. The Administrative Agent may consult
with legal counsel (who may be counsel for an Obligor), independent accountants
and other experts selected by it, and shall not be liable for any action taken
or not taken by it in accordance with the advice of any such counsel,
accountants or experts.

                  The Administrative Agent may perform any and all its duties
and exercise its rights and powers by or through any one or more sub-agents
appointed by the Administrative Agent. The Administrative Agent and any such
sub-agent may perform any and all its duties and exercise its rights and powers
through their respective Related Parties. The exculpatory provisions of the
preceding paragraphs shall apply to any such sub-agent and to the Related
Parties of the Administrative Agent and any such sub-agent, and shall apply to
their respective activities in connection with the syndication of the credit
facilities provided for herein as well as activities as Administrative Agent.

                  The Administrative Agent may resign at any time by notifying
the Lenders, the LC Bank and the Lead Borrower. Upon any such resignation, the
Required Lenders shall have the right, to appoint a successor, subject (so long
as no Default has occurred and is continuing) to the prior written consent of
the Lead Borrower (which consent shall not be unreasonably withheld or delayed).
If no successor shall have been so appointed by the Required Lenders and shall
have accepted such appointment within 30 days after the retiring Administrative
Agent gives notice of its resignation, then the retiring Administrative Agent's
resignation shall nonetheless become effective and (1) the retiring
Administrative Agent shall be discharged from its duties and obligations
hereunder and (2) the Required Lenders shall perform the duties of the
Administrative Agent (and all payments and communications provided to be made
by, to or through the Administrative Agent shall instead be made by or to each
Lender directly) until such time as the Required Lenders appoint a successor
agent as provided for above in this paragraph. Upon the acceptance of its
appointment as Administrative Agent hereunder by a successor, such successor
shall succeed to and become vested with all the rights, powers, privileges and
duties of the retiring (or retired) Administrative Agent and the retiring
Administrative Agent shall be discharged from its duties and obligations
hereunder (if not already discharged therefrom as provided above in this
paragraph). The fees payable by the Borrowers to a successor Administrative
Agent shall be the same as those payable to its predecessor unless otherwise
agreed between the Lead Borrower and such successor. After the Administrative
Agent's resignation hereunder, the provisions of this Article and Section 9.03
shall continue in effect for its benefit in respect of any actions taken or
omitted to be taken by it while it was acting as Administrative Agent.

                                Credit Agreement

<PAGE>

                                     -106-

                  Each Lender acknowledges that it has, independently and
without reliance upon the Administrative Agent or any other Lender and based on
such documents and information as it has deemed appropriate, made its own credit
analysis and decision to enter into this Agreement. Each Lender also
acknowledges that it will, independently and without reliance upon the
Administrative Agent or any other Lender and based on such documents and
information as it shall from time to time deem appropriate, continue to make its
own decisions in taking or not taking action under or based upon this Agreement,
any other Credit Document or any related agreement or any document furnished
hereunder or thereunder.

         Section 8.02. Collateral Security.

                  (a) Each of the Lenders and the LC Bank hereby irrevocably
authorize the Administrative Agent to execute and deliver, and otherwise enter
into or accept, each of the Security Documents referred to in Section 5.01(f) or
other Security Documents necessary or (in the opinion of the Administrative
Agent) reasonably necessary to effect the requirements of Section 6.22.

                  (b) Except as otherwise provided in Section 9.02(b) with
respect to this Agreement, the Administrative Agent may, with the prior consent
of the Required Lenders (but not otherwise), consent to any modification,
supplement or waiver under any of the Credit Documents, including agreeing to
additional obligations (including obligations held by Persons other than Lenders
and the Administrative Agent) being secured by any Collateral; provided that,
without the prior consent of each Lender, the Administrative Agent shall not
(except as provided herein or in the Security Documents) release any substantial
part of the Collateral or otherwise terminate any substantial part of the Liens
under any Security Document (whether by release of property or Obligor) or alter
the relative priorities of the obligations entitled to the benefits of the Liens
created under the Security Documents; provided further that no such consent of
any Lender shall be required, and the Administrative Agent is hereby authorized,
to release any Lien covering Collateral (and to release any such guarantor) (i)
that is the subject of a disposition of property permitted hereunder or under
any of the other Credit Documents pursuant to Section 6.22(b) or (ii) that is
the property of a Subsidiary that has been designated an Unrestricted Entity in
accordance with Section 6.16(e).

                  (c) The Lenders and the LC Bank hereby agree, solely for the
benefit of the Administrative Agent, that the Administrative Agent may terminate
any and all Liens created by the Security Documents at and after the time that
(i) all of the Loans shall have become due (whether at stated maturity, upon
acceleration or otherwise), (ii) such Loans and all interest thereon, and all
fees payable hereunder, shall have been paid in full in cash, (iii) all
Commitments of the Lenders shall have terminated and (iv) all Letters of Credit
shall have expired or have been cancelled, unless prior to such time any Lender
or the LC Bank shall have delivered to the Administrative Agent a written notice
that such Lender or LC Bank holds a Secured Obligation under a Hedge Agreement,
cash management arrangement or foreign exchange contract, a Guarantee thereof or
a claim for an indemnity or expense hereunder, and such Lender or the LC Bank
shall not have (A) delivered to the Administrative Agent a subsequent written
notice that such Secured Obligation shall have been satisfied or discharged or
(B) consented to the termination of such Liens.

                                Credit Agreement
<PAGE>
                                     -107-

                                   ARTICLE IX

                                  MISCELLANEOUS

                  Section 9.01. Notices. Except in the case of notices and other
communications expressly permitted to be given by telephone, all notices and
other communications provided for herein shall be in writing and shall be
delivered by hand or overnight courier service, mailed by certified or
registered mail or sent by telecopy, as follows:

                  (a) if to any of the Obligors or the Lead Borrower, to the
         Lead Borrower at c/o ISP Management Company, Inc., 1361 Alps Road,
         Wayne, New Jersey 07470, Attention of Vice President - Finance
         (Telecopy No. 201-628-3326; Telephone No. 201-628-4000);

                  (b) if to the Administrative Agent, to The Chase Manhattan
         Bank, 1 Chase Manhattan Plaza, 8th Floor, New York, New York 10081,
         Attention of Terri Williams, Loan and Agency Services Group (Telecopy
         No. 212-552-5777; Telephone No. 212-552-7409), with a copy to The Chase
         Manhattan Bank, 270 Park Avenue, 38th Floor, New York, New York 10017,
         Attention of Peter A. Dedousis (Telecopy No. 212-270-7938; Telephone
         No. 212-270-4062);

                  (c) if to the LC Bank, to it at The Chase Manhattan Bank, 1
         Chase Manhattan Plaza, 8th Floor, New York, New York 10081, Attention
         of Michael Cerniglia, Loan and Agency Services Group (Telecopy No.
         212-552-5777; Telephone No. 212-552-7906);

                  (d) if to the Swingline Lender, to The Chase Manhattan Bank, 1
         Chase Manhattan Plaza, 8th Floor, New York, New York 10081, Attention
         of Terri Williams, Loan and Agency Services Group (Telecopy No.
         212-552-5777; Telephone No. 212-552-7409); and

                  (e) if to a Lender, to it at its address (or telecopy number)
         set forth in its Administrative Questionnaire.

Any party hereto may change its address or telecopy number for notices and other
communications hereunder by notice to the other parties hereto (or, in the case
of any such change by a Lender, by notice to the Lead Borrower and the
Administrative Agent). All notices and other communications given to any party
hereto in accordance with the provisions of this Agreement shall be deemed to
have been given on the date of receipt.

                  Section 9.02. Waivers; Amendments.

                  (a) No Deemed Waivers; Remedies Cumulative. No failure or
delay by the Administrative Agent, the LC Bank or any Lender in exercising any
right or power hereunder shall operate as a waiver thereof, nor shall any single
or partial exercise of any such right or power, or any abandonment or
discontinuance of steps to enforce such a right or power, preclude any other or
further exercise thereof or the exercise of any other right or power. The rights
and remedies of the Administrative Agent, the LC Bank and the Lenders hereunder
are cumulative and are not exclusive of any rights or remedies that they would
otherwise have. No waiver of any provision of this Agreement or consent to any
departure by any Obligor therefrom shall in

                                Credit Agreement
<PAGE>
                                     -108-

any event be effective unless the same shall be permitted by paragraph (b) of
this Section, and then such waiver or consent shall be effective only in the
specific instance and for the purpose for which given. Without limiting the
generality of the foregoing, the making of a Loan or issuance of a Letter of
Credit shall not be construed as a waiver of any Default, regardless of whether
the Administrative Agent, any Lender or the LC Bank may have had notice or
knowledge of such Default at the time.

                  (b) Amendments. Neither this Agreement nor any provision
hereof may be waived, amended or modified except pursuant to an agreement or
agreements in writing entered into by the Borrowers and the Required Lenders or
by the Borrowers and the Administrative Agent with the consent of the Required
Lenders; provided that no such agreement shall

                  (i) increase any Commitment of any Lender without the written
         consent of such Lender (it being understood and agreed that automatic
         reinstatements of the Revolving Credit Commitments pursuant to Section
         2.08(b) are not an increase of Commitments under this provision;
         provided that it being further understood and agreed that the
         Commitment of any Lender shall not exceed the Commitment of such Lender
         as set forth on Schedule I without the written consent of such Lender),

                  (ii) reduce the principal amount of any Loan or LC
         Disbursement or reduce the rate of interest thereon, or reduce any fees
         payable hereunder, without the written consent of each Lender affected
         thereby,

                  (iii) postpone the scheduled date of payment of the principal
         amount of any Loan or LC Disbursement, or any interest thereon, or any
         fees payable hereunder, or reduce the amount of, waive or excuse any
         such payment, or postpone the scheduled date of expiration of any
         Commitment, without the written consent of each Lender affected
         thereby,

                  (iv) change Section 2.17(e) without the consent of each Lender
         affected thereby,

                  (v) change any of the provisions of this Section or the
         percentage in the definition of the term "Required Lenders" or any
         other provision hereof specifying the number or percentage of Lenders
         required to waive, amend or modify any rights hereunder or make any
         determination or grant any consent hereunder, without the written
         consent of each Lender, or

                  (vi) release all or substantially all of (A) the Subsidiary
         Guarantors from their guarantee obligations under Article III or (B)
         except as provided in Section 6.22(b), any substantial part of the
         Collateral without the written consent of each Lender;

provided further that (x) no such agreement shall amend, modify or otherwise
affect the rights or duties of the Administrative Agent, the LC Bank or the
Swingline Lender hereunder without the prior written consent of the
Administrative Agent, the LC Bank or the Swingline Lender, as the case may be,
(y) no such agreement (regardless of the provision of this Agreement that it may
amend, modify or waive) shall be effective to satisfy or waive the conditions
set forth in Section 5.02 without the written consent of the Required Lenders of
the class of Revolving Credit Lenders and (z) that any modification or
supplement of Article III shall require the

                                Credit Agreement
<PAGE>
                                      -109-

consent of each Subsidiary Guarantor; provided further, however, that the
Administrative Agent may waive the conditions set forth in clauses (b) (solely
with respect to local counsel opinions), (f) and (g) of Section 5.01 on terms
and further conditions as it may determine.

                  Section 9.03. Expenses; Indemnity; Damage Waiver.

                  (a) Costs and Expenses. The Borrowers shall pay (i) all
reasonable out-of-pocket expenses incurred by the Administrative Agent, the Lead
Arranger and their Affiliates, including the reasonable fees, charges and
disbursements of counsel for the Administrative Agent, in connection with the
syndication of the credit facilities provided for herein, the preparation and
administration of this Agreement and the other Credit Documents, the filing,
recording and registering, as applicable, of the Security Documents (including
all taxes and assessments incurred in connection therewith) or any amendments,
modifications or waivers of the provisions hereof or thereof (whether or not the
transactions contemplated hereby or thereby shall be consummated), (ii) all
out-of-pocket expenses incurred by the LC Bank in connection with the issuance,
amendment, renewal or extension of any Letter of Credit or any demand for
payment thereunder and (iii) all out-of-pocket expenses incurred by the
Administrative Agent, the LC Bank or any Lender, including the fees, charges and
disbursements of any counsel for the Administrative Agent, the LC Bank or any
Lender, in connection with the enforcement or protection of its rights in
connection with this Agreement and the other Credit Documents, including its
rights under this Section, or in connection with the Loans made or Letters of
Credit issued hereunder, including in connection with any workout, restructuring
or negotiations in respect thereof.

                  (b) Indemnification by the Borrowers. The Borrowers shall
indemnify the Administrative Agent, the LC Bank and each Lender, and each
Related Party of any of the foregoing Persons (each such Person being called an
"Indemnitee") against, and to hold each Indemnitee harmless from, any and all
losses, claims, damages, liabilities and related expenses, including the fees,
charges and disbursements of any counsel for any Indemnitee, incurred by or
asserted against any Indemnitee arising out of, in connection with, or as a
result of (i) the execution or delivery of this Agreement or any agreement or
instrument contemplated hereby, the performance by the parties hereto of their
respective obligations hereunder or the consummation of the Transactions or any
other transactions contemplated hereby, (ii) any Loan or Letter of Credit or the
use of the proceeds therefrom (including any refusal by the LC Bank to honor a
demand for payment under a Letter of Credit if the documents presented in
connection with such demand do not strictly comply with the terms of such Letter
of Credit), (iii) any Environmental Law as a result of the past, present or
future operations of Chemco or any of its Subsidiaries (or any predecessor in
interest to Chemco or any of its Subsidiaries), or the past, present or future
condition of any site or facility owned, operated or leased by Chemco or any of
its Subsidiaries (or any such predecessor in interest), (iv) or any Release or
threatened Release of any Hazardous Materials from any such site or facility or
(v) any actual or prospective claim, litigation, investigation or proceeding
relating to any of the foregoing, whether based on contract, tort or any other
theory and regardless of whether any Indemnitee is a party thereto; provided
that such indemnity shall not, as to any Indemnitee, be available to the extent
that such losses, claims, damages, liabilities or related expenses are
determined by a court of competent jurisdiction by final and nonappealable
judgment to have resulted from the gross negligence or willful misconduct of
such Indemnitee.

                                Credit Agreement
<PAGE>
                                     -110-

                  (c) Reimbursement by Lenders. To the extent that the Borrowers
fail to pay any amount required to be paid by them to the Administrative Agent,
the LC Bank or the Swingline Lender under paragraph (a) or (b) of this Section,
each Lender severally agrees to pay to the Administrative Agent, the LC Bank or
the Swingline Lender, as the case may be, such Lender's Applicable Percentage
(determined as of the time that the applicable unreimbursed expense or indemnity
payment is sought) of such unpaid amount; provided that the unreimbursed expense
or indemnified loss, claim, damage, liability or related expense, as the case
may be, was incurred by or asserted against the Administrative Agent, the LC
Bank or the Swingline Lender in its capacity as such.

                  (d) Waiver of Consequential Damages, Etc. To the extent
permitted by applicable law, no Obligor shall assert, and each Obligor hereby
waives, any claim against any Indemnitee, on any theory of liability, for
special, indirect, consequential or punitive damages (as opposed to direct or
actual damages) arising out of, in connection with, or as a result of, this
Agreement or any agreement or instrument contemplated hereby, the Transactions,
any Loan or Letter of Credit or the use of the proceeds thereof.

                  (e) Payments. All amounts due under this Section shall be
payable on written demand therefor.

                  Section 9.04. Successors and Assigns.

                  (a) Assignments Generally. The provisions of this Agreement
shall be binding upon and inure to the benefit of the parties hereto and their
respective successors and assigns permitted hereby, except that no Obligor may
assign or otherwise transfer any of its rights or obligations hereunder without
the prior written consent of each Lender (and any attempted assignment or
transfer by any Obligor without such consent shall be null and void). Nothing in
this Agreement, expressed or implied, shall be construed to confer upon any
Person (other than the parties hereto, their respective successors and assigns
permitted hereby and, to the extent expressly contemplated hereby, the Related
Parties of each of the Administrative Agent, the LC Bank and the Lenders) any
legal or equitable right, remedy or claim under or by reason of this Agreement.

                  (b) Assignments by Lenders. Any Lender may assign to one or
more assignees all or a portion of its rights and obligations under this
Agreement (including all or a portion of its Commitments and the Loans at the
time owing to it); provided that

                  (i) except in the case of an assignment to a Lender or an
         Affiliate (or Approved Fund) of a Lender, the Lead Borrower and the
         Administrative Agent (and, in the case of an assignment of all or a
         portion of a Commitment or any Lender's obligations in respect of its
         LC Exposure or Swingline Exposure, the LC Bank and the Swingline
         Lender) must give their prior written consent to such assignment (which
         consent shall not be unreasonably withheld or delayed),

                  (ii) except in the case of an assignment to a Lender or an
         Affiliate (or Approved Fund) of a Lender or an assignment of the entire
         remaining amount of the assigning Lender's Commitment(s), the amount of
         the Commitment(s) of the assigning Lender subject to each such
         assignment (determined as of the date the Assignment and

                                Credit Agreement
<PAGE>
                                     -111-

         Acceptance with respect to such assignment is delivered to the
         Administrative Agent) shall not be less than $5,000,000 (in the case of
         the assignment of a Revolving Credit Commitment and Revolving Credit
         Exposure) and $1,000,000 (in the case of Term Loans) unless the Lead
         Borrower and the Administrative Agent otherwise consent,

                  (iii) each partial assignment shall be made as an assignment
         of a proportionate part of all the assigning Lender's rights and
         obligations under this Agreement,

                  (iv) the parties to each assignment shall execute and deliver
         to the Administrative Agent an Assignment and Acceptance, together with
         a processing and recordation fee of $3,500, and

                  (v) the assignee, if it shall not be a Lender, shall deliver
         to the Administrative Agent an Administrative Questionnaire;

provided further that any consent of the Lead Borrower (or any of the other
Borrowers) otherwise required under this paragraph shall not be required if an
Event of Default has occurred and is continuing. Upon acceptance and recording
pursuant to paragraph (d) of this Section, from and after the effective date
specified in each Assignment and Acceptance, the assignee thereunder shall be a
party hereto and, to the extent of the interest assigned by such Assignment and
Acceptance, have the rights and obligations of a Lender under this Agreement,
and the assigning Lender thereunder shall, to the extent of the interest
assigned by such Assignment and Acceptance, be released from its obligations
under this Agreement (and, in the case of an Assignment and Acceptance covering
all of the assigning Lender's rights and obligations under this Agreement, such
Lender shall cease to be a party hereto but shall continue to be entitled to the
benefits of Sections 2.14, 2.15, 2.16 and 9.03). Any assignment or transfer by a
Lender of rights or obligations under this Agreement that does not comply with
this paragraph shall be treated for purposes of this Agreement as a sale by such
Lender of a participation in such rights and obligations in accordance with
paragraph (e) of this Section.

                  Notwithstanding anything to the contrary contained herein, any
Lender (a "Granting Lender") may grant to a special purpose vehicle (an "SPV")
of such Granting Lender, identified as such in writing from time to time by the
Granting Lender to the Administrative Agent and the Lead Borrower, the option to
provide to the Borrowers all or any part of any Loan that such Granting Lender
would otherwise be obligated to make to the Borrowers pursuant to Section 2.01,
provided that (i) nothing herein shall constitute a commitment by any SPV to
make any Loan, (ii) if an SPV elects not to exercise such option or otherwise
fails to provide all or any part of such Loan, the Granting Lender shall be
obligated to make such Loan pursuant to the terms hereof, (iii) the Borrowers
may bring any proceeding against either the Granting Lender or the SPV in order
to enforce any rights of the Borrowers under any of the Credit Documents and
(iv) the Borrowers, the Administrative Agent, the LC Bank and the other Lenders
shall continue to deal solely and directly with the Granting Lender in
connection with Granting Lender's rights and obligations under this Agreement
and the other Credit Documents. The making of a Loan by an SPV hereunder shall
utilize the relevant Commitment of the Granting Lender to the same extent, and
as if, such Loan were made by the Granting Lender. Each party hereto hereby
agrees that no SPV shall be liable for any payment under this Agreement for
which a Lender would otherwise be liable, for so long as, and to the extent, the
related Granting Lender makes such payment. In furtherance of the foregoing,
each party hereto hereby agrees (which agreement

                                Credit Agreement
<PAGE>
                                     -112-

shall survive the termination of this Agreement) that, prior to the date that is
one year and one day after the payment in full of all outstanding commercial
paper or other senior indebtedness of any SPV, it will not institute against, or
join any other person in instituting against, such SPV any bankruptcy,
reorganization, arrangement, insolvency or liquidation proceedings or similar
proceedings under the laws of the United States or any State thereof arising out
of any claim against such SPV under this Agreement. In addition, notwithstanding
anything to the contrary contained in this Section, any SPV may with notice to,
but without the prior written consent of, the Lead Borrower or the
Administrative Agent and without paying any processing fee therefor, assign all
or a portion of its interests in any Loans to its Granting Lender or (or with
the consent of the Lead Borrower and the Administrative Agent, which consent
shall not be unreasonably withheld or delayed) to any financial institutions
providing liquidity and/or credit support (if any) with respect to commercial
paper issued by such SPV to fund such Loans and such SPV may disclose, on a
confidential basis, confidential information with respect to the Borrowers and
their Subsidiaries to any rating agency, commercial paper dealer or provider of
a surety, guarantee or credit liquidity enhancement to such SPV. This paragraph
may not be amended without the consent of any SPV at the time holding Loans
under this Agreement.

                  (c) Maintenance of Register by the Administrative Agent. The
Administrative Agent, acting for this purpose as an agent of the Borrowers,
shall maintain at one of its offices in New York City a copy of each Assignment
and Acceptance delivered to it and a register for the recordation of the names
and addresses of the Lenders, and the Commitments of, and principal amount of
the Loans and LC Disbursements owing to, each Lender pursuant to the terms
hereof from time to time (the "Register"). The entries in the Register shall be
conclusive, and the Borrowers, the Administrative Agent, the LC Bank and the
Lenders may treat each Person whose name is recorded in the Register pursuant to
the terms hereof as a Lender hereunder for all purposes of this Agreement,
notwithstanding notice to the contrary. The Register shall be available for
inspection by the Borrowers, the LC Bank and any Lender, at any reasonable time
and from time to time upon reasonable prior notice.

                  (d) Effectiveness of Assignments. Upon its receipt of a duly
completed Assignment and Acceptance executed by an assigning Lender and an
assignee, the assignee's completed Administrative Questionnaire (unless the
assignee shall already be a Lender hereunder), the processing and recordation
fee referred to in paragraph (b) of this Section and any written consent to such
assignment required by paragraph (b) of this Section, the Administrative Agent
shall accept such Assignment and Acceptance and record the information contained
therein in the Register. No assignment shall be effective for purposes of this
Agreement unless it has been recorded in the Register as provided in this
paragraph.

                  (e) Participations. Any Lender may, without the consent of the
Lead Borrower, the Borrowers, the Administrative Agent, the LC Bank or the
Swingline Lender, sell participations to one or more banks or other entities (a
"Participant") in all or a portion of such Lender's rights and obligations under
this Agreement and the other Credit Documents (including all or a portion of its
Commitments and the Loans owing to it); provided that (i) such Lender's
obligations under this Agreement and the other Credit Documents shall remain
unchanged, (ii) such Lender shall remain solely responsible to the other parties
hereto for the performance of such obligations and (iii) the Lead Borrower, the
Borrowers, the Administrative Agent, the LC Bank and the other Lenders shall
continue to deal solely and directly with such Lender in connection with such
Lender's rights and obligations under this Agreement and the other Credit

                                Credit Agreement
<PAGE>
                                     -113-

Documents. Any agreement or instrument pursuant to which a Lender sells such a
participation shall provide that such Lender shall retain the sole right to
enforce this Agreement and the other Credit Documents and to approve any
amendment, modification or waiver of any provision of this Agreement or any
other Credit Document; provided that such agreement or instrument may provide
that such Lender will not, without the consent of the Participant, agree to any
amendment, modification or waiver described in the first proviso to Section
9.02(b) that affects such Participant. Subject to paragraph (f) of this Section,
the Borrowers agree that each Participant shall be entitled to the benefits of
Sections 2.14, 2.15 and 2.16 to the same extent as if it were a Lender and had
acquired its interest by assignment pursuant to paragraph (b) of this Section.

                  (f) Limitations on Rights of Participants. A Participant shall
not be entitled to receive any greater payment under Section 2.14 or 2.16 than
the applicable Lender would have been entitled to receive with respect to the
participation sold to such Participant, unless the sale of the participation to
such Participant is made with the Lead Borrower's prior written consent. A
Participant that would be a Foreign Lender if it were a Lender shall not be
entitled to the benefits of Section 2.16 unless the Lead Borrower is notified of
the participation sold to such Participant and such Participant agrees, for the
benefit of the Borrowers, to comply with Section 2.16(e) as though it were a
Lender.

                  (g) Certain Pledges. Any Lender may at any time pledge or
assign a security interest in all or any portion of its rights under this
Agreement to secure obligations of such Lender, including any such pledge or
assignment to a Federal Reserve Lender, and this Section shall not apply to any
such pledge or assignment of a security interest; provided that no such pledge
or assignment of a security interest shall release a Lender from any of its
obligations hereunder or substitute any such assignee for such Lender as a party
hereto.

                  (h) No Assignments to the Obligors or Affiliates. Anything in
this Section to the contrary notwithstanding, no Lender may assign or
participate any interest in any Loan or LC Exposure held by it hereunder to the
Borrowers or any of their Affiliates or Subsidiaries without the prior consent
of each Lender.

                  Section 9.05. Survival. All covenants, agreements,
representations and warranties made by the Borrowers or the Lead Borrower herein
and in the certificates or other instruments delivered in connection with or
pursuant to this Agreement shall be considered to have been relied upon by the
other parties hereto and shall survive the execution and delivery of this
Agreement and the making of any Loans and issuance of any Letters of Credit,
regardless of any investigation made by any such other party or on its behalf
and notwithstanding that the Administrative Agent, the LC Bank or any Lender may
have had notice or knowledge of any Default or incorrect representation or
warranty at the time any credit is extended hereunder, and shall continue in
full force and effect as long as the principal of or any accrued interest on any
Loan or any fee or any other amount payable under this Agreement is outstanding
and unpaid or any Letter of Credit is outstanding and so long as the Commitments
have not expired or terminated. The provisions of Sections 2.14, 2.15, 2.16,
3.03 and 9.03 and Article VIII shall survive and remain in full force and effect
regardless of the consummation of the transactions contemplated hereby, the
repayment of the Loans, the expiration or termination of the Letters of Credit
and the Commitments or the termination of this Agreement or any provision
hereof.

                                Credit Agreement
<PAGE>
                                     -114-

                  Section 9.06. Counterparts; Integration; Effectiveness. This
Agreement may be executed in counterparts (and by different parties hereto on
different counterparts), each of which shall constitute an original, but all of
which when taken together shall constitute a single contract. This Agreement and
any separate letter agreements with respect to fees payable to the
Administrative Agent constitute the entire contract between and among the
parties relating to the subject matter hereof and supersede any and all previous
agreements and understandings, oral or written, relating to the subject matter
hereof. Except as provided in Section 5.01, this Agreement shall become
effective when it shall have been executed by the Administrative Agent and when
the Administrative Agent shall have received counterparts hereof which, when
taken together, bear the signatures of each of the other parties hereto, and
thereafter shall be binding upon and inure to the benefit of the parties hereto
and their respective successors and assigns. Delivery of an executed counterpart
of a signature page to this Agreement by telecopy shall be effective as delivery
of a manually executed counterpart of this Agreement.

                  Section 9.07. Severability. Any provision of this Agreement
held to be invalid, illegal or unenforceable in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such invalidity, illegality
or unenforceability without affecting the validity, legality and enforceability
of the remaining provisions hereof; and the invalidity of a particular provision
in a particular jurisdiction shall not invalidate such provision in any other
jurisdiction.

                  Section 9.08. Right of Setoff. If an Event of Default shall
have occurred and be continuing, each Lender is hereby authorized at any time
and from time to time, to the fullest extent permitted by law, to set off and
apply any and all deposits (general or special, time or demand, provisional or
final) at any time held and other indebtedness at any time owing by such Lender
to or for the credit or the account of any Obligor against any of and all the
obligations of any Obligor now or hereafter existing under this Agreement held
by such Lender, irrespective of whether or not such Lender shall have made any
demand under this Agreement and although such obligations may be unmatured. The
rights of each Lender under this Section are in addition to other rights and
remedies (including other rights of setoff) which such Lender may have.

                  Section 9.09. Governing Law; Jurisdiction; Etc.

                  (a) Governing Law. This Agreement shall be construed in
accordance with and governed by the law of the State of New York.

                  (b) Submission to Jurisdiction. Each Obligor hereby
irrevocably and unconditionally submits, for itself and its property, to the
nonexclusive jurisdiction of any New York State court sitting in New York City
or the United Stated District Court for the Southern District of New York and
any appellate court from any thereof, in any action or proceeding arising out of
or relating to this Agreement, or for recognition or enforcement of any
judgment, and each of the parties hereto hereby irrevocably and unconditionally
agrees that all claims in respect of any such action or proceeding may be heard
and determined in such State or, to the extent permitted by law, in such Federal
court. Each of the parties hereto agrees that a final judgment in any such
action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.
Nothing in this Agreement shall affect any right that the Administrative Agent,
the LC Bank or any Lender may otherwise have to bring any action or proceeding
relating to this Agreement against any Obligor or its properties in the courts
of any jurisdiction.

                                Credit Agreement
<PAGE>
                                     -115-

                  (c) Waiver of Venue. Each Obligor hereby irrevocably and
unconditionally waives, to the fullest extent it may legally and effectively do
so, any objection which it may now or hereafter have to the laying of venue of
any suit, action or proceeding arising out of or relating to this Agreement in
any court referred to in paragraph (b) of this Section. Each of the parties
hereto hereby irrevocably waives, to the fullest extent permitted by law, the
defense of an inconvenient forum to the maintenance of such action or proceeding
in any such court.

                  (d) Service of Process. Each party to this Agreement
irrevocably consents to service of process in the manner provided for notices in
Section 9.01. Nothing in this Agreement will affect the right of any party to
this Agreement to serve process in any other manner permitted by law.

                  Section 9.10. WAIVER OF JURY TRIAL. EACH PARTY HERETO HEREBY
WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE
TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF
OR RELATING TO THIS AGREEMENT OR ANY OTHER CREDIT DOCUMENT OR THE TRANSACTIONS
CONTEMPLATED HEREBY OR THEREBY (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER
THEORY). EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR
ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH
OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING
WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN
INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS
AND CERTIFICATIONS IN THIS SECTION.

                  Section 9.11. Headings. Article and Section headings and the
Table of Contents used herein are for convenience of reference only, are not
part of this Agreement and shall not affect the construction of, or be taken
into consideration in interpreting, this Agreement.

                  Section 9.12. Treatment of Certain Information;
Confidentiality.

                  (a) Treatment of Certain Information. Each of the Obligors
acknowledges that from time to time financial advisory, investment banking and
other services may be offered or provided to Chemco and its Subsidiaries and
Affiliates (in connection with this Agreement or otherwise) by any Lender or by
one or more subsidiaries or affiliates of such Lender and each of the Obligors
hereby authorizes each Lender to share any information delivered to such Lender
by Chemco or any of its Subsidiaries pursuant to this Agreement, or in
connection with the decision of such Lender to enter into this Agreement, to any
such subsidiary or affiliate, it being understood that any such subsidiary or
affiliate receiving such information shall be bound by the provisions of
paragraph (b) of this Section as if it were a Lender hereunder. Such
authorization shall survive the repayment of the Loans, the expiration or
termination of the Letters of Credit and the Commitments or the termination of
this Agreement or any provision hereof.

                  (b) Confidentiality. Each of the Administrative Agent, the LC
Bank and the Lenders agrees to maintain the confidentiality of the Information
(as defined below), except that Information may be disclosed (i) to its and its
Affiliates' directors, officers, employees and

                                Credit Agreement
<PAGE>
                                     -116-

agents, including accountants, legal counsel and other advisors (it being
understood that the Persons to whom such disclosure is made will be informed of
the confidential nature of such Information and instructed to keep such
Information confidential), (ii) to the extent requested by any regulatory
authority, (iii) to the extent required by applicable laws or regulations or by
any subpoena or similar legal process, (iv) to any other party to this
Agreement, (v) in connection with the exercise of any remedies hereunder or
under any other Credit Document or any suit, action or proceeding relating to
this Agreement or any other Credit Document or the enforcement of rights
hereunder or thereunder, (vi) subject to an agreement containing provisions
substantially the same as those of this paragraph, to any assignee of or
Participant in, or any prospective assignee of or Participant in, any of its
rights or obligations under this Agreement, (vii) with the consent of the Lead
Borrower, (viii) to the extent such Information (A) becomes publicly available
other than as a result of a breach of this paragraph or (B) becomes available to
the Administrative Agent, the LC Bank or any Lender on a nonconfidential basis
from a source other than an Obligor, (ix) to the National Association of
Insurance Commissioners, (x) to rating agencies, including Moody's and Standard
& Poor's or (xi) to any Lender's or Affiliated Fund's direct or indirect
contractual counterparty to a swap agreement or such contractual counterparty's
professional advisor (so long as such contractual counterparty or professional
advisor to such contractual counterparty agrees to be bound by the provisions of
this Section). For the purposes of this paragraph, "Information" means all
information received from any Obligor relating to any Obligor or its business,
other than any such information that is available to the Administrative Agent,
the LC Bank or any Lender on a nonconfidential basis prior to disclosure by an
Obligor; provided that, in the case of information received from an Obligor
after the date hereof, such information is clearly identified at the time of
delivery as confidential. Any Person required to maintain the confidentiality of
Information as provided in this Section shall be considered to have complied
with its obligation to do so if such Person has exercised the same degree of
care to maintain the confidentiality of such Information as such Person would
accord to its own confidential information.

                                Credit Agreement
<PAGE>
                                     -117-

                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed by their respective authorized officers as of the
day and year first above written.

                                    BORROWERS

                              ISP CHEMCO INC.,
                                  individually and as Lead Borrower

                              By: /s/ Susan Yoss
                                  ---------------------------------
                                  Name: Susan Yoss
                                  Title: Executive Vice President

                              ISP CHEMICALS INC.
                              ISP TECHNOLOGIES INC.
                              ISP MINERALS INC.

                              By: /s/ Susan Yoss
                                  ---------------------------------
                                  Name: Susan Yoss
                                  Title: Executive Vice President

                                Credit Agreement
<PAGE>
                                     -118-

                              SUBSIDIARY GUARANTORS

                              BLUEHALL INCORPORATED
                              VERONA INC.
                              ISP ALGINATES INC.
                              ISP MANAGEMENT COMPANY, INC.
                              ISP REAL ESTATE COMPANY, INC.
                              ISP FREETOWN FINE CHEMICALS INC.
                              ISP INVESTMENTS INC.
                              ISP GLOBAL TECHNOLOGIES INC.
                              ISP INTERNATIONAL CORP.
                              ISP (PUERTO RICO) INC.
                              ISP ENVIRONMENTAL SERVICES INC.
                              ISP MANAGEMENT LLC
                              ISP MINERALS LLC
                              ISP TECHNOLOGIES LLC
                              ISP CHEMICALS LLC
                              ISP INVESTMENTS LLC
                              ISP GLOBAL TECHNOLOGIES LLC

                              By: /s/ Richard A. Weinberg
                                  ---------------------------------
                                  Name: Richard A.Weinberg
                                  Title: Executive Vice President

                              LENDERS

                              THE CHASE MANHATTAN BANK, individually and as
                                 Swingline Lender, Letter of Credit Bank and
                                 Administrative Agent

                              By: /s/ Peter A. Dedousis
                                  ---------------------------------
                                  Name: Peter A. Dedousis
                                  Title: Managing Director

                              BEAR STEARNS CORPORATE LENDING INC.

                              By: /s/ Keith C. Barnish
                                  ---------------------------------
                                  Name: Keith C. Barnish

                                Credit Agreement
<PAGE>
                                     -119-

                              UBS AG, STAMFORD BRANCH

                              By: /s/ Wilfred V. Saint
                                  ---------------------------------
                                  Name: Wilfred V. Saint
                                  Title: Associate Director
                                         Banking Products Services US

                              By: /s/ Daniel W. Ladd III
                                  ---------------------------------
                                  Name: Daniel W. Ladd III
                                  Title: Executive Director

                              THE BANKERS TRUST COMPANY

                              By: /s/ Robert R. Telesca
                                  ---------------------------------
                                  Name: Robert R. Telesca
                                  Title: Vice President

                              THE BANK OF NOVA SCOTIA

                              By: /s/ Brian S. Allen
                                  ---------------------------------
                                  Name: Brian S. Allen
                                  Title: Managing Director

                              BNP PARIBAS

                              By: /s/ Duane P. Helkowski
                                  ---------------------------------
                                  Name: Duane P. Helkowski
                                  Title: Director

                              By: /s/ Shayn P. March
                                  ---------------------------
                                  Name: Shayn P. March
                                  Title: Vice President

                                Credit Agreement
<PAGE>
                                     -120-

                                KZH CRESCENT LLC

                              By: /s/ Susan Lee
                                  ---------------------------------
                                  Name: Susan Lee
                                  Title: Authorized Agent

                               KZH CRESCENT-2 LLC

                              By: /s/ Susan Lee
                                  ---------------------------------
                                  Name: Susan Lee
                                  Title: Authorized Agent

                               KZH CRESCENT-3 LLC

                              By: /s/ Susan Lee
                                  ---------------------------------
                                  Name: Susan Lee
                                  Title: Authorized Agent

                              UNITED OF OMAHA LIFE INSURANCE COMPANY
                              By:  TCW Asset Management Company, its Investment
                                      Adviser

                              By: /s/ Mark L. Gold
                                  ---------------------------------
                                  Name: Mark L. Gold
                                  Title: Managing Director

                              By: /s/ G. Steven Kalin
                                  ---------------------------------
                                  Name: G. Steven Kalin
                                  Title: Vice President

                              METROPOLITAN LIFE INSURANCE COMPANY

                              By: /s/ James R. Dingler
                                  ---------------------------------
                                  Name: James R. Dingler
                                  Title: Director

                                Credit Agreement
<PAGE>
                                     -121-

                              TORONTO DOMINION (NEW YORK), INC.

                              By: /s/ Susan Strong
                                  ---------------------------------
                                  Name: Susan Strong
                                  Title: Vice President

                              STANWICH LOAN FUNDING LLC

                              By: /s/ Kelly C. Walker
                                  ---------------------------------
                                  Name: Kelly C. Walker
                                  Title: Vice President

                               NATIONAL CITY BANK

                              By: /s/ Jeffrey Tengel
                                  ---------------------------------
                                  Name: Jeffrey Tengel
                                  Title: Senior Managing Director

                              WINGED FOOT FUNDING TRUST

                              By: /s/ Kelly C. Walker
                                  ---------------------------------
                                  Name: Kelly C. Walker
                                  Title: Authorized Agent

                              KZH CNC LLC

                              By: /s/ Susan Lee
                                  ---------------------------------
                                  Name: Susan Lee
                                  Title: Authorized Agent

                                  KZH ING-2 LLC

                              By: /s/ Susan Lee
                                  ---------------------------------
                                  Name: Susan Lee
                                  Title: Authorized Agent

                                Credit Agreement
<PAGE>
                                     -122-

                                  KZH ING-3 LLC

                              By: /s/ Susan Lee
                                  ---------------------------------
                                  Name: Susan Lee
                                  Title: Authorized Agent

                               KZH HIGHLAND-2 LLC

                              By: /s/ Susan Lee
                                  ---------------------------------
                                  Name: Susan Lee
                                  Title: Authorized Agent

                               KZH CRESCENT-2 LLC

                              By: /s/ Susan Lee
                                  ---------------------------------
                                  Name: Susan Lee
                                  Title: Authorized Agent

                              PRINCIPAL LIFE INSURANCE COMPANY

                              By:   Principal Capital Management, LLC,
                                    its authorized signatory

                                    By: /s/ Douglas A. Drees
                                        ---------------------------------
                                        Name: Douglas A. Drees
                                        Title: Counsel

                                    By: /s/ James C. Fifield
                                        ---------------------------------
                                        Name:  James C. Fifield
                                        Title: Counsel

                                Credit Agreement
<PAGE>
                                                                    SCHEDULE I

                                 Commitments
                   (in each case as of the Effective Date)

         [See definitions of "Lenders", "Revolving Credit Commitment"
         and "Term Loan Commitment" in Section 1.01]

                          Revolving Credit Commitments

<TABLE>
<CAPTION>
Revolving Credit Lender                        Commitment Amount
-----------------------                        -----------------
<S>                                            <C>
THE CHASE MANHATTAN BANK                       $  45,000,000.00

BEAR STEARNS CORPORATE LENDING INC.            $  42,000,000.00

UBS AG, STAMFORD BRANCH                        $  36,000,000.00

BANKERS TRUST COMPANY                          $  36,000,000.00

THE BANK OF NOVA SCOTIA                        $  36,000,000.00

BNP PARIBAS                                    $  30,000,000.00
                                               ----------------
TOTAL REVOLVING CREDIT LENDERS                 $ 225,000,000.00
                                               ================
</TABLE>

                            Schedule I (Commitments)
<PAGE>
                              Term Loan Commitments

<TABLE>
<CAPTION>
Term Loan Lender                                Commitment Amount
----------------                                -----------------
<S>                                             <C>
THE CHASE MANHATTAN BANK                        $162,500,000.00

METROPOLITAN LIFE INSURANCE COMPANY               15,000,000.00

THE BANK OF NOVA SCOTIA                            8,000,000.00

KZH HIGHLAND-2 LLC                                 5,000,000.00

NATIONAL CITY BANK                                 5,000,000.00

PRINCIPAL LIFE INSURANCE COMPANY                   5,000,000.00

STANWICH LOAN FUNDING LLC                          4,000,000.00

TORONTO DOMINION (NEW YORK) INC.                   4,000,000.00

KZH CRESCENT-2 LLC                                 3,500,000.00

KZH CRESCENT-3 LLC                                 2,500,000.00

KZH CRESCENT LLC                                   2,500,000.00

KZH CNC LLC                                        2,000,000.00

KZH ING-2 LLC                                      2,000,000.00

KZH ING-3 LLC                                      1,000,000.00

WINGED FOOT FUNDING TRUST                          2,000,000.00

UNITED OF OMAHA LIFE INSURANCE COMPANY             1,000,000.00
                                                ---------------
TOTAL TERM LOAN LENDERS                         $225,000,000.00
                                                ===============
</TABLE>

                                Credit Agreement
<PAGE>
                                                                   SCHEDULE II

                          Material Agreements and Liens

                               [See Section 4.12]

Part A - Material Agreements

Part B - Liens the Title Company is willing to omit from title policies

                  Schedule II (Material Agreement and Liens)
<PAGE>
                                                                    SCHEDULE III

                             Restrictive Agreements

                               [See Section 6.08]

                      Schedule III (Restrictive Agreements)
<PAGE>
                                                                     SCHEDULE IV

                      Litigation and Contingent Liabilities

          [See definition of "Disclosed Matters" in Section 1.01 and
                           Sections 4.02 and 4.03]

               Schedule IV (Litigation and Contingent Liabilities)
<PAGE>
                                                                      SCHEDULE V

                              Environmental Matters

   [See definition of "Disclosed Matters" in Section 1.01 and Section 4.13]

                       Schedule V (Environmental Matters)
<PAGE>
                                                                     SCHEDULE VI

                          Subsidiaries and Investments

                          [See Sections 4.14 and 4.20]

Part A - Subsidiaries and Affiliates

Part B - Equity Investments

Part C - Other Investments

                  Schedule VI (Subsidiaries and Investments)
<PAGE>
                                                                    SCHEDULE VII

                                  Real Property

                               [See Section 4.17]

Part A - Closing Date Mortgaged Properties

Part B - Post-Closing Mortgaged Properties

Part C - Other Real Property

                          Schedule VII (Real Property)
<PAGE>
                                                                 SCHEDULE VIII

                              Unrestricted Entities

                      Schedule VIII (Foreign Subsidiaries)
<PAGE>
                                                                       EXHIBIT A

                       [Form of Assignment and Acceptance]

                            ASSIGNMENT AND ACCEPTANCE

                  Reference is made to the Credit Agreement dated as of June 27,
2001 (as amended, restated, supplemented and otherwise modified and in effect on
the date hereof, the "Credit Agreement") among ISP Chemco Inc., ISP Chemicals
Inc., ISP Technologies Inc. and ISP Minerals Inc., as Borrowers, the Subsidiary
Guarantors party thereto, the Lenders named therein and The Chase Manhattan
Bank, as Administrative Agent for the Lenders. Terms defined in the Credit
Agreement are used herein with the same meanings.

                  The Assignor named below hereby sells and assigns, without
recourse, to the Assignee named below, and the Assignee hereby purchases and
assumes, without recourse, from the Assignor, effective as of the Assignment
Date set forth below, the interests set forth below (the "Assigned Interest") in
the Assignor's rights and obligations under the Credit Agreement, including the
interests set forth below in the Commitment of the Assignor on the Assignment
Date and Syndicated Loans owing to the Assignor which are outstanding on the
Assignment Date, together with unpaid interest accrued on the assigned Loans to
the Assignment Date, the participations in Letters of Credit, LC Disbursements
and Swingline Loans held by the Assignor on the Assignment Date, and the amount,
if any, set forth below of the fees accrued to the Assignment Date for account
of the Assignor. The Assignee hereby acknowledges receipt of a copy of the
Credit Agreement. From and after the Assignment Date (i) the Assignee shall be a
party to and be bound by the provisions of the Credit Agreement and, to the
extent of the interests assigned by this Assignment and Acceptance, have the
rights and obligations of a Lender thereunder and (ii) the Assignor shall, to
the extent of the interests assigned by this Assignment and Acceptance,
relinquish its rights and be released from its obligations under the Credit
Agreement.

                  This Assignment and Acceptance is being delivered to the
Administrative Agent together with (i) if the Assignee is a Foreign Lender, any
documentation required to be delivered by the Assignee pursuant to Section
2.16(e) of the Credit Agreement, duly completed and executed by the Assignee,
and (ii) if the Assignee is not already a Lender under the Credit Agreement, an
Administrative Questionnaire in the form supplied by the Administrative Agent,
duly completed by the Assignee. The [Assignee/Assignor] shall pay the fee
payable to the Administrative Agent pursuant to Section 9.04(b) of the Credit
Agreement.

                  This Assignment and Acceptance shall be governed by and
construed in accordance with the laws of the State of New York.

                      Exhibit A (Assignment and Acceptance)
<PAGE>
Date of Assignment:

Legal Name of Assignor:

Legal Name of Assignee:

Assignee's Address for Notices:

Effective Date of Assignment
("Assignment Date")1:

<TABLE>
<CAPTION>
Principal                                             Amount
Facility                                              Assigned
--------                                              --------
<S>                                                   <C>
Commitment Assigned:                                  $

Syndicated Loans:

Fees Assigned (if any):
</TABLE>

The terms set forth above and below are hereby agreed to:

                                    [NAME OF ASSIGNOR]      , as
                                    ------------------------
                                    Assignor

                                    By:
                                        --------------------------
                                        Name:
                                        Title:

                                    [NAME OF ASSIGNEE]      , as
                                    ------------------------
                                    Assignee

                                    By:
                                        --------------------------
                                        Name:
                                        Title:

                      Exhibit A (Assignment and Acceptance)
<PAGE>
The undersigned hereby consent to the within assignment:1

ISP CHEMCO INC.,
  as Lead Borrower

By: _________________________
    Name:
    Title:

THE CHASE MANHATTAN BANK,
  as Administrative Agent,
  as Swingline Lender
  and as LC Bank

By: _________________________
    Name:
    Title:

(1)    Consents to be included to the extent  required by Section 9.04(b)
       of the Credit Agreement.

                      Exhibit A (Assignment and Acceptance)
<PAGE>
                                                                       EXHIBIT B

                   [Form of Guarantee Assumption Agreement]

                         GUARANTEE ASSUMPTION AGREEMENT

                  GUARANTEE ASSUMPTION AGREEMENT (this "Agreement") dated as of
________ __, ____ by [NAME OF ADDITIONAL SUBSIDIARY GUARANTOR], a ________
corporation (the "Additional Subsidiary Guarantor"), in favor of The Chase
Manhattan Bank, as administrative agent for the lenders or other financial
institutions or entities party as "Lenders" to the Credit Agreement referred to
below (in such capacity, together with its successors in such capacity, the
"Administrative Agent").

                  ISP Chemco Inc., ISP Chemicals Inc., ISP Technologies Inc. and
ISP Minerals Inc., as Borrowers, the Subsidiary Guarantors party thereto, the
Lenders party thereto and the Administrative Agent are parties to a Credit
Agreement dated as of June 27, 2001 (as modified and supplemented and in effect
from time to time, the "Credit Agreement"; terms not otherwise defined herein
are used herein as defined in the Credit Agreement).

                  Pursuant to Section 6.16(a) of the Credit Agreement, the
Additional Subsidiary Guarantor hereby agrees to become a "Subsidiary Guarantor"
for all purposes of the Credit Agreement (and hereby supplements Schedule IV to
the Credit Agreement, as appropriate, as specified in Appendix A hereto), and an
"Obligor" for all purposes of the Pledge and Security Agreement (and hereby
supplements Annex[es] 1 [through [9]] to the Pledge and Security Agreement as
specified in Appendix B hereto). Without limiting the foregoing, the Additional
Subsidiary Guarantor hereby, jointly and severally with the other Subsidiary
Guarantors, guarantees to each Lender and the Administrative Agent and their
respective successors and assigns the prompt payment in full when due (whether
at stated maturity, by acceleration or otherwise) of all Guaranteed Obligations
in the same manner and to the same extent as is provided in Article III of the
Credit Agreement. In addition, the Additional Subsidiary Guarantor hereby makes
the representations and warranties set forth in Sections 4.01, 4.02 and 4.03 of
the Credit Agreement, and in Section 2 of the Pledge and Security Agreement,
with respect to itself and its obligations under this Agreement, as if each
reference in such Sections to the Credit Documents included reference to this
Agreement, and hereby irrevocably appoints the Lead Borrower as its agent under
the Pledge and Security Agreement, and authorizes the Lead Borrower to take such
actions on its behalf, and exercise such powers, as are set as are delegated to
the Lead Borrower by the terms thereof (including by reference to the Lead
Borrower therein), together with such actions and powers as are reasonably
incidental thereto, and the Lead Borrower hereby accepts such appointment.

                  The Additional Subsidiary Guarantor hereby instructs its
counsel to deliver to the Lenders, the LC Bank and the Administrative Agent the
opinions referred to in Section 6.16(a) of the Credit Agreement.

                  Exhibit B (Guarantee Assumption Agreement)
<PAGE>
                  IN WITNESS WHEREOF, the Additional Subsidiary Guarantor has
caused this Agreement to be duly executed and delivered as of the day and year
first above written.

                                    [NAME OF ADDITIONAL SUBSIDIARY
                                        GUARANTOR]

                                    By: ____________________________
                                        Name:
                                        Title:

Accepted and agreed:

THE CHASE MANHATTAN BANK, as
  Administrative Agent

By: ____________________________
    Name:
    Title:

Accepted and agreed:

ISP CHEMCO INC.,
  as Lead Borrower

By: ____________________________
    Name:
    Title:

                  Exhibit B (Guarantee Assumption Agreement)
<PAGE>
                                                                      Appendix A

                 SUPPLEMENT TO SCHEDULE IV TO CREDIT AGREEMENT

                  Exhibit B (Guarantee Assumption Agreement)
<PAGE>
                                                                      Appendix B

               SUPPLEMENT[S] TO ANNEX[ES] TO SECURITY AGREEMENT

Supplement to Annex 1:

            [to be completed]

Supplement to Annex 2:

            [to be completed]

Supplement to Annex 3:

            [to be completed]

Supplement to Annex 4:

            [to be completed]

Supplement to Annex 5:

            [to be completed]

Supplement to Annex 6:

            [to be completed]

Supplement to Annex 7:

            [to be completed]

Supplement to Annex 8:

            [to be completed]

Supplement to Annex 9:

            [to be completed]

                  Exhibit B (Guarantee Assumption Agreement)
<PAGE>
                                                                       EXHIBIT C

                      [Form of LC Reimbursement Agreement]

                  LC REIMBURSEMENT AGREEMENT (this "Agreement") dated as of
[_____________], 200[_], among __________________________, a
____________________ corporation (the "Account Party"), ISP CHEMCO INC., a
Delaware corporation, as agent (in such capacity, the "Lead Borrower") for the
Borrowers party to the Credit Agreement referred to below, and THE CHASE
MANHATTAN BANK, as the Letter of Credit Bank thereunder.

                              W I T N E S S E T H:

                  WHEREAS, the Borrowers, the Subsidiary Guarantors, certain
Lenders party thereto and the Administrative Agent are parties to a Credit
Agreement dated as of [_________], 2001 (as amended, restated, supplemented and
in effect from time to time, the "Credit Agreement"; terms not otherwise defined
herein are used herein as defined in the Credit Agreement), providing, subject
to the terms and conditions thereof, for extensions of credit to be made by said
lenders to the Borrowers in an aggregate principal or face amount not exceeding
$450,000,000 at any one time outstanding, including the issuance from time to
time of Letters of Credit at the request of the Lead Borrower for the account of
any Obligor;

                  WHEREAS, pursuant to the Credit Agreement, the Lead Borrower
may request the issuance of one or more Letters of Credit for the account of any
member of the Chemco Consolidated Group or any Affiliate of Chemco, provided
that such member or Affiliate (other than an Obligor) enters into a LC
Reimbursement Agreement; and

                  WHEREAS, the Account Party has requested or may in the future
request that the Lead Borrower request one or more Letters of Credit for account
of the Account Party, and, accordingly, the Borrowers and the Account Party are
entering into this Agreement.

                  NOW, THEREFORE, in consideration of the foregoing premises,
the parties hereto hereby agree as follows:

                  1. Reimbursement Obligations, Fees and Other Amounts; No
Cover.

                  (a) In the event that the Lead Borrower shall request the
issuance of a Letter of Credit under the Credit Agreement upon the request and
for account of the Account Party (each being an "Account Party Letter of
Credit"), the Account Party shall pay to the Borrowers (i) all obligations of
the Borrowers to reimburse amounts paid by the LC Bank in respect of any drawing
under Account Party Letters of Credit (such obligations, at any time, being the
"Reimbursement Obligations") arising under the Credit Agreement or any LC
Document in respect of such Account Party Letter of Credit and (ii) all fees and
any other amounts payable to the LC Bank or the Administrative Agent, for
account of the Lenders and/or the LC Bank, in respect of such Account Party
Letter of Credit whether arising as a consequence of the issuance thereof or
during the period any LC Exposure shall be outstanding in respect thereof
(including, without limitation, any amounts payable in respect of such Account
Party Letter of Credit or a

                     Exhibit C (LC Reimbursement Agreement)
<PAGE>
                                      -2-

ratable portion of any amounts payable in respect of Letters of Credit generally
pursuant to Section 2.14 of the Credit Agreement), in each case at such times
and in such amounts as such Reimbursement Obligations, fees and other amounts
shall be due and payable by the Borrowers under the Credit Agreement or the LC
Documents relating thereto.

                  (b) If an Event of Default shall occur and be continuing and
(i) the Lead Borrower receives notice from the Administrative Agent or the
Required Lenders (or, if the maturity of the Loans has been accelerated, Lenders
with LC Exposure representing more than 50% of the total LC Exposure) demanding
the deposit of cash Collateral pursuant to this paragraph or (ii) if such Event
of Default is of the type referred to in clause (f) or (g) of Article VII of the
Credit Agreement, without any demand or taking of any other action by the
Administrative Agent or Lenders, the Account Party shall be pay to the Lead
Borrower an amount in cash equal to 105% of the sum of the LC Exposure in
respect of each Account Party Letter of Credit as of such date plus any accrued
and unpaid interest thereon, as cover for LC Exposure of the Borrowers in
respect of such Account Party Letter of Credit. The Lead Borrower may re-pledge
such cash or the proceeds thereof to the Administrative Agent as collateral
security for the Secured Obligations.

                  2. Obligations Absolute.

                  (a) The Reimbursement Obligations of the Account Party under
this Agreement with respect to the Account Party Letters of Credit shall be
absolute, unconditional and irrevocable, and shall be performed strictly in
accordance with the terms of this Agreement and the Credit Agreement under any
and all circumstances whatsoever and irrespective of:

                  (i) any lack of validity or enforceability of any Account
         Party Letter of Credit, or any term or provision therein;

                  (ii) any draft or other document presented under any Account
         Party Letter of Credit proving to be forged, fraudulent or invalid in
         any respect or any statement therein being untrue or inaccurate in any
         respect;

                  (iii) payment by the LC Bank under any Account Party Letter of
         Credit against presentation of a draft or other document that does not
         comply strictly with the terms of such Account Party Letter of Credit;
         and

                  (iv) any other event or circumstance whatsoever, whether or
         not similar to any of the foregoing, that might, but for the provisions
         of this paragraph (a), constitute a legal or equitable discharge of the
         Account Party's obligations hereunder.

                  (b) Neither the Administrative Agent, the Lenders nor the LC
Bank, nor any of their Related Parties, shall have any liability or
responsibility by reason of or in connection with the issuance or transfer of
any Account Party Letter of Credit by the LC Bank or any payment or failure to
make any payment thereunder (irrespective of any of the circumstances referred
to in clause (a) above), or any error, omission, interruption, loss or delay in
transmission or delivery of any draft, notice or other communication under or
relating to any Account Party Letter of Credit (including any document required
to make a drawing thereunder), any error in interpretation of technical terms or
any consequence arising from causes beyond the control of the LC Bank; provided
that the foregoing shall not be construed to excuse the LC Bank from liability
to the

                 Exhibit C (Form of LC Reimbursement Agreement)
<PAGE>
                                      -3-

Account Party to the extent of any direct damages (as opposed to consequential
damages, claims in respect of which are hereby waived by the Account Party to
the extent permitted by applicable law) suffered by the Account Party that are
caused by the LC Bank's gross negligence or willful misconduct when determining
whether drafts and other documents presented under an Account Party Letter of
Credit comply with the terms thereof. The parties hereto expressly agree that:

                  (i) the LC Bank may accept documents that appear on their face
         to be in substantial compliance with the terms of an Account Party
         Letter of Credit without responsibility for further investigation,
         regardless of any notice or information to the contrary, and may make
         payment upon presentation of documents that appear on their face to be
         in substantial compliance with the terms of such Account Party Letter
         of Credit;

                  (ii) the LC Bank shall have the right, in its sole discretion,
         to decline to accept such documents and to make such payment if such
         documents are not in strict compliance with the terms of such Account
         Party Letter of Credit; and

                  (iii) this sentence shall establish the standard of care to be
         exercised by the LC Bank when determining whether drafts and other
         documents presented under an Account Party Letter of Credit comply with
         the terms thereof (and the parties hereto hereby waive, to the extent
         permitted by applicable law, any standard of care inconsistent with the
         foregoing).

                  3. Third-Party Beneficiaries. The Administrative Agent and the
Lenders shall be beneficiaries of this Agreement, and (in addition to the LC
Bank) shall be entitled to enforce the provisions hereof against the Account
Party (provided that there shall be only one satisfaction of the Account Party's
obligations hereunder among the other parties hereto and the third-party
beneficiaries hereof). This Agreement shall not limit or otherwise affect the
rights of the Lenders, the LC Bank or the Administrative Agent under the Credit
Agreement or the obligations of the Borrowers or the other Obligors thereunder.
The parties hereto agree not to amend, restate, supplement, waive or otherwise
modify any provision of this Agreement without the prior written consent of the
Administrative Agent.

                  4. Governing Law. This Agreement shall be governed by and
construed in accordance with the law of the State of New York.

                  IN WITNESS WHEREOF, the parties have entered into this
Agreement as of the date and year first written above.

                                    [ACCOUNT PARTY]

                                    By: __________________________
                                        Name:
                                        Title:

                 Exhibit C (Form of LC Reimbursement Agreement)
<PAGE>
                                      -4-

                                    ISP CHEMCO INC.,
                                       as Lead Borrower

                                    By _________________________
                                       Name:
                                       Title:

                                    THE CHASE MANHATTAN BANK,
                                       as LC Bank

                                    By _________________________
                                       Name:
                                       Title:

Received in form satisfactory
to:

THE CHASE MANHATTAN BANK, as
  Administrative Agent

By: ____________________________
    Name:
    Title:

                 Exhibit C (Form of LC Reimbursement Agreement)<PAGE>
                                                                    EXHIBIT 10.2

                                 AMENDMENT NO. 1
                                       TO
                                CREDIT AGREEMENT

            AMENDMENT No. 1 (this "Amendment No. 1"), dated as of July 24, 2001,
by and among ISP Chemco Inc., ISP Chemicals Inc., ISP Technologies Inc. and ISP
Minerals Inc. (collectively, the "Borrowers") and The Chase Manhattan Bank, as
Administrative Agent, to that certain Credit Agreement, dated as of June 27,
2001 (the "Credit Agreement"), among the Borrowers, the Subsidiary Guarantors
party thereto, the Lenders party thereto and The Chase Manhattan Bank, as
Administrative Agent. Capitalized terms used herein and not otherwise defined
herein shall have the meaning ascribed to such terms in the Credit Agreement.

                              W I T N E S S E T H:

            WHEREAS, the Borrowers, the Subsidiary Guarantors and the
Administrative Agent are parties to the Credit Agreement; and

            WHEREAS, the Borrowers and the Administrative Agent, with the
consent of the Required Lenders, have agreed to the amendments contained herein
subject to the terms and conditions set forth herein;

            NOW, THEREFORE, in consideration of the foregoing, the mutual
covenants and obligations herein set forth and other good and valuable
consideration, the adequacy and receipt of which is hereby acknowledged, and in
reliance upon the representations, warranties and covenants herein contained,
the parties hereto, intending to be legally bound, hereby agree as follows:

      SECTION 1. AMENDMENTS.

            The Credit Agreement is, effective as of the Amendment Effective
Date (as defined below), amended as follows:

            (a) Amendment to Article I (Definitions).

                  (1) The definition of "Qualified Senior Subordinated Debt" in
Section 1.01 (Defined Terms) of the Credit Agreement is hereby amended and
restated in its entirety to read as follows:

                  "Qualified Senior Subordinated Debt" means Indebtedness of the
      Borrowers (a) contractually subordinated in right of payment to the
      Indebtedness hereunder, (b) incurred and outstanding at any time when (1)
      no Indebtedness of any direct or indirect parent of Chemco is outstanding
      (determined as of the close of business on the first day such Indebtedness
      is incurred under this clause (b)(1) and each day thereafter), other than
      loans payable to any members of the Chemco Consolidated Group pursuant to
      Section 6.07(k) or (2) the Indebtedness of the ISP 2002 Notes, the ISP
      2003 Notes or Qualified ISP Debt, or any combination of the foregoing, is
      the only outstanding Indebtedness of any direct or indirect parent of
      Chemco (other than loans payable to any member of the Chemco Consolidated
      Group pursuant to Section 6.07(k)) and the proceeds of such Qualified
      Senior Subordinated Debt shall be used for the purpose of redeeming or
      otherwise retiring the ISP 2003 Notes in accordance with Sections
      6.07(k)(ii) and 6.10(c)(ii) until such ISP 2003 Notes have been redeemed
      or otherwise retired in full (and pending such use such proceeds shall be
      deposited by (or on behalf of) the
<PAGE>

      Borrowers in an escrow account with the Wilmington Trust Company or other
      escrow agent reasonably acceptable to the Administrative Agent), provided,
      however, that if at any time Indebtedness in respect of both Qualified ISP
      Debt and the ISP 2003 Notes is outstanding, the proceeds of such Qualified
      ISP Debt (less the amount of any proceeds of any Qualified Senior
      Subordinated Debt on deposit in an escrow account pursuant to this clause
      (b)(2)) shall be used for the purpose of redeeming or otherwise retiring
      the ISP 2003 Notes in accordance with Sections 6.07(k)(ii) and 6.10(c)(ii)
      (and pending such use such proceeds shall be deposited by (or on behalf
      of) the Borrowers in an escrow account with the Wilmington Trust Company
      or other escrow agent reasonably acceptable to the Administrative Agent)
      and (c)(1) incurred under, and in accordance with the terms of, the
      Required Senior Subordinated Debt Documents or (2) incurred under
      definitive documentation, and on terms and conditions, substantially
      similar to the Required Subordinated Debt Documents and the terms and
      conditions thereof, as determined by the Administrative Agent, including
      (i) the definition of "Senior Debt" (or the like) therein shall cover
      principal, interest, fees, reimbursement obligations and all other amounts
      owing hereunder, (ii) the subordination provisions of which shall apply,
      and the terms of which shall not permit any redemption, repurchase,
      defeasance, retirement or other prepayment of such Indebtedness, until the
      payment in full in cash of all amounts owing hereunder, (iii) the
      covenants, events of default and other terms therein shall be less
      restrictive than those set forth herein, and shall not include any
      maintenance financial covenants, (iv) the holders of such Indebtedness
      shall be required to give the Administrative Agent reasonable prior
      written notice of any acceleration of such Indebtedness, (v) the initial
      scheduled principal repayment date of such Indebtedness shall be at least
      one year and one day beyond the Term Loan Maturity Date, (vi) the interest
      rate applicable to such Indebtedness shall be a market rate, (vii)
      payments of principal of, interest on and all other amounts owing with
      respect to such Indebtedness shall be prohibited in the event of (x)
      acceleration of the maturity of the Loans hereunder, (y) the voluntary or
      involuntary bankruptcy or insolvency of any of the Borrowers and the other
      Subsidiaries and (z) subject to payment blockage provisions consistent
      with market practice, a Default under clause (a) of Article VII, (viii)
      assignments of such Indebtedness shall be prohibited except subject to the
      subordination provisions, (ix) amounts received by any holder of such
      Indebtedness in contravention of the subordination terms shall be held in
      trust and promptly paid over to the Administrative Agent, (x) the terms
      and conditions of such Indebtedness shall not be amended or otherwise
      modified without the consent of the Required Lenders, (xi) such
      Indebtedness shall not require the consent of any holder thereof with
      respect to any amendment or other modification of any of the Credit
      Documents and (xii) the documentation shall contain other payment blockage
      provisions that are consistent with market practice and an "X" clause.

            (b) Amendments to Article VI (Covenants).

                  (1) Section 6.05 (Use of Proceeds) of the Credit Agreement is
hereby amended by inserting at the end of such Section 6.05 a clause (c) to read
as follows:

                  "(c) The Borrowers shall use the net proceeds from the
      issuance of Qualified Senior Subordinated Debt, which qualifies as such
      pursuant to clause (b)(2) (and not clause (b)(1)) of the definition of
      "Qualified Senior Subordinated Debt" set forth in Section 1.01, solely to
      redeem or otherwise retire the ISP 2003 Notes, and after the redemption or
      other retirement of the ISP 2003 Notes in full, for general corporate
      purposes."

                  (2) Clause (d) of Section 6.06 (Indebtedness) of the Credit
Agreement by replacing the word "the" immediately preceding the phrase "date of
incurrence" in the second line

                                       2
<PAGE>

thereof with the word "each" and by inserting the phrase "in each case"
immediately after the phrase "provided that" in the fourth line thereof.

                  (3) Clause (k) of Section 6.09 (Limitation on Liens) of the
Credit Agreement is hereby amended and restated in its entirety to read as
follows:

            "Liens on the proceeds of the issuance of the Required Senior
Subordinated Debt and Qualified Senior Subordinated Debt that are on deposit in
an escrow account pursuant to the Required Senior Subordinated Debt Documents or
Qualified Senior Subordinated Debt Documents and which proceeds shall be used in
accordance with Section 6.05(b) or (c) hereof, as the case may be;"

            (c) Amendment to Article IX (Miscellaneous).

                  (1) Clause (b)(ii) of Section 9.04 (Successors and Assigns) of
the Credit Agreement is hereby amended by inserting the phrase "(which consent
shall not be unreasonably withheld or delayed)" immediately after the word
"consent" in the last line thereof.

                  (2) Clause (b)(iv) of Section 9.04 (Successors and Assigns) of
the Credit Agreement is hereby amended by inserting the phrase ", which fee with
respect to any assignment may be waived by the Administrative Agent in its sole
discretion" immediately after the amount "$3,500" in the last line thereof.

      SECTION 2. CONDITIONS OF EFFECTIVENESS. This Amendment No. 1 shall become
effective when, and only when, the Administrative Agent shall have received in
form and substance satisfactory to the Administrative Agent sufficient executed
copies for each of the Lenders (the "Amendment Effective Date") this Amendment
No. 1, duly executed by the Borrowers and the Administrative Agent.

      SECTION 3. REPRESENTATIONS AND WARRANTIES. On and as of the Amendment
Effective Date, after giving effect to this Amendment No. 1, each Borrower
represents and warrants to the Administrative Agent and each Lender as follows:

            (a) This Amendment No. 1 has been duly authorized, executed and
delivered by such Borrower and constitutes a legal, valid and binding obligation
of such Borrower, enforceable against such Borrower in accordance with its
terms; and

            (b) Each of the representations and warranties set forth in Article
IV (Representations and Warranties) of the Credit Agreement or the other Credit
Documents are true and correct on and as of the Amendment Effective Date
immediately prior to and after giving effect to this Amendment No. 1, except to
the extent that such representations and warranties specifically relate to a
specific date, in which case the representations and warranties shall be true
and correct as of such specific date.

      SECTION 4. REFERENCE TO THE EFFECT ON THE CREDIT DOCUMENTS.

            (a) As of the Amendment Effective Date, each reference in the Credit
Agreement to "this Agreement," "hereunder," "hereof," "herein," or words of like
import, and each reference in the other Credit Documents to the Credit
Agreement, shall mean and be a reference to the Credit Agreement as amended
hereby, and this Amendment No. 1 and the Credit Agreement shall be read together
and construed as a single instrument.

                                       3
<PAGE>

            (b) Except as specifically amended herein, the Credit Agreement
shall remain in full force and effect and is hereby ratified and confirmed.

            (c) The execution, delivery and effectiveness of this Amendment No.
1 shall not, except as expressly provided herein, operate as a waiver of any
right, power or remedy of the Lenders or the Administrative Agent under any of
the Credit Documents, nor constitute a waiver of any provision of any of the
Credit Documents.

            (d) This Amendment No. 1 is a Credit Document.

      SECTION 5. EXECUTION IN COUNTERPARTS. This Amendment No. 1 may be executed
in any number of counterparts and by different parties hereto in separate
counterparts, each of which, when so executed and delivered, shall be deemed to
be an original and all of which taken together shall constitute but one and the
same instrument. Delivery of an executed counterpart by telecopy shall be
effective as delivery of a manually executed counterpart of this Amendment
No. 1.

      SECTION 6. GOVERNING LAW. This Amendment No. 1 shall be governed by and
construed in accordance with the law of the State of New York.

      SECTION 7. HEADINGS. Section headings in this Amendment No. 1 are included
herein for convenience of reference only and shall not constitute a part of this
Amendment No. 1 for any other purpose.

                            [SIGNATURE PAGE FOLLOWS]

                                       4
<PAGE>
            IN WITNESS WHEREOF, this Amendment No. 1 has been duly executed on
the date set forth above.

                                       ISP CHEMCO INC.
                                       ISP CHEMICALS INC.
                                       ISP TECHNOLOGIES INC.
                                       ISP MINERALS INC.

                                       By: /s/ Susan B. Yoss
                                          ---------------------------------
                                          Name: Susan B. Yoss
                                          Title: Executive Vice President-
                                                 Finance & Treasurer

                                       THE CHASE MANHATTAN BANK,
                                       as Administrative Agent

                                       By: /s/ Peter A. Dedousis
                                          ---------------------------------
                                          Name: Peter A. Dedousis
                                          Title: Managing Director

              SIGNATURE PAGE TO AMENDMENT NO. 1 TO CREDIT AGREEMENT

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