EXHIBIT 3.1L


                                STATE OF DELAWARE
                           CERTIFICATE OF AMENDMENT OF
                          CERTIFICATE OF INCORPORATION

o    FIRST: That at a meeting of the Board of Directors of CK Holding
     Corporation resolutions were duly adopted setting forth a proposed
     amendment of the Certificate of Incorporation of said corporation,
     declaring said amendment to be advisable and calling a meeting of the
     stockholders of said corporation for consideration thereof.

     The resolution setting forth the proposed amendment is as follows:

     Resolved, that the Certificate of Incorporation of this corporation be
     amended by changing the Article thereof numbered "ONE" so that, as amended,
     said Article shall be and read as follows:

     "The Name of the Corporation is: Crompton Holding Corporation"

o    SECOND: That thereafter, pursuant to resolution of its Board of Directors,
     a special meeting of the stockholders of said corporation was duly called
     and held, upon notice in accordance with Section 222 of the General
     Corporation Law of the State of Delaware at which meeting the necessary
     number of shares as required by statute were voted in favor of the
     amendment.

o    THIRD: That said amendment was duly adopted in accordance with the
     provisions of Section 242 of the General Corporation Law of the State of
     Delaware.

o    FOURTH: That the capital of said corporation shall not be reduced under or
     by reason of said amendment.

                                                  BY: /s/ Arthur C. Fullerton
                                                      --------------------------
                                                       (Authorized Officer)

                                                NAME: Arthur C. Fullerton
                                                      --------------------------
                                                        (Type or Print)

   STATE OF DELAWARE
  SECRETARY OF STATE
DIVISION OF CORPORATIONS
FILED 09:00 AM 05/22/2000
   001258588 - 2448496