Exhibit 10.1(f)


              LETTER AMENDMENT NO. 1 TO FIVE YEAR CREDIT AGREEMENT



                                                Dated as of November 18, 2005

To the banks, financial institutions
        and other institutional lenders
        (collectively, the "Lenders") parties
        to the Credit Agreement referred to
        below and to Citicorp North America, Inc., as agent
        (the "Agent") for the Lenders

Ladies and Gentlemen:

               We refer to the Five Year Credit Agreement dated as of February
15, 2005 (the "Credit Agreement") among the undersigned and you. Capitalized
terms not otherwise defined in this Letter Amendment have the same meanings as
specified in the Credit Agreement.

               It is hereby agreed by you and us as follows:

               Exhibit F to the Credit Agreement is, effective as of the date of
this Letter Amendment, hereby amended by deleting from Section 1 thereof the
phrase "any Hedge Agreements entered into by the Company and any Lender" and
substituting therefor the phrase "any Hedge Agreements entered into by the
Company and any Lender or any Affiliate of any Lender".

               This Letter Amendment shall become effective as of the date first
above written when, and only when, the Agent shall have received counterparts of
this Letter Amendment executed by the undersigned and the Required Lenders or,
as to any of the Lenders, advice satisfactory to the Agent that such Lender has
executed this Letter Amendment.

               On and after the effectiveness of this Letter Amendment, each
reference in the Credit Agreement to "this Agreement", "hereunder", "hereof" or
words of like import referring to the Credit Agreement, and each reference in
the Notes and each of the other Loan Documents, if any, to "the Credit
Agreement", "thereunder", "thereof" or words of like import referring to the
Credit Agreement, shall mean and be a reference to the Credit Agreement, as
amended by this Letter Amendment.

               The Credit Agreement, the Notes and each of the other Loan
Documents, as specifically amended by this Letter Amendment, are and shall
continue to be in full force and effect and are hereby in all respects ratified
and confirmed. The execution, delivery and effectiveness of this Letter
Amendment shall not, except as expressly provided herein, operate as a waiver of
any right, power or remedy of any Lender or the Agent under the Credit
Agreement, nor constitute a waiver of any provision of the Credit Agreement.

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               If you agree to the terms and provisions hereof, please evidence
such agreement by executing and returning at least three counterparts of this
Letter Amendment to Susan L. Hobart, Shearman & Sterling LLP, 599 Lexington
Avenue, New York, New York 10022.

               This Letter Amendment may be executed in any number of
counterparts and by different parties hereto in separate counterparts, each of
which when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement. Delivery of an executed
counterpart of a signature page to this Letter Amendment by telecopier shall be
effective as delivery of a manually executed counterpart of this Letter
Amendment.

               This Letter Amendment shall be governed by, and construed in
accordance with, the laws of the State of New York.

                                                     Very truly yours,


                                                     CYTEC INDUSTRIES INC.


                                                     By: /S/ T. Wozniak
                                                         -----------------------
                                                         Title: Treasurer


Agreed as of the date first above written:

CITICORP NORTH AMERICA, INC.,
        as Agent and as Lender

By: /S/ Irina Lurye
    ---------------------------------------------
    Title: Director


WACHOVIA BANK, NATIONAL ASSOCIATION

By
    ---------------------------------------------
    Title:


ABN AMRO BANK N.V.

By
    ---------------------------------------------
    Title:


By
    ---------------------------------------------
    Title:




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CALYON NEW YORK BRANCH

By: /S/ Yuri Muzichenko
    ---------------------------------------------
    Title: Vice President


By: /S/ Mike J. Madnick
    ---------------------------------------------
    Title: Director


THE BANK OF NOVA SCOTIA

By: /S/ Thane Rattew
    ---------------------------------------------
    Title: Managing Director


SUNTRUST BANK

By
    ---------------------------------------------
    Title:


THE BANK OF NEW YORK

By: /S/ Ernest Fung
    ---------------------------------------------
    Title: Vice President


COMMERZBANK AG, NEW YORK AND GRAND CAYMAN BRANCHES

By: /S/ Robert Traylor, Jr.
    ---------------------------------------------
    Title: Senior Vice President


By: /S/ Andrew P. Lusk
    ---------------------------------------------
    Title: Vice President


FORTIS CAPITAL CORP.

By: /S/ John W. Deegan
    ---------------------------------------------
    Title: Senior Vice President


By: /S/ Douglas Riahi
    ---------------------------------------------
    Title: Managing Director


BAYERISCHE HYPO-UND VERSEINSBANK AG, NEW YORK BRANCH

By
    ---------------------------------------------
    Title:



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<PAGE>


By
    ---------------------------------------------
    Title:


PNC BANK, NATIONAL ASSOCIATION

By: /S/ Michael Nardo
    ---------------------------------------------
    Title: Senior Vice President


SUMITOMO MITSUI BANKING CORP., NEW YORK

By
    ---------------------------------------------
    Title:


UFJ BANK LIMITED

By
    ---------------------------------------------
    Title:


BANK OF CHINA, NEW YORK BRANCH

By: /S/ William W. Smith
    ---------------------------------------------
    Title: Deputy General Manager


KBC BANK, N.V.

By
    ---------------------------------------------
    Title:


By
    --------------------------------------------
    Title:
















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