FIRST AMENDMENT TO THE
                                UNION CARBIDE
                       COMPENSATION DEFERRAL PROGRAM


            The Union  Carbide  Compensation  Deferral  Program  (the "Plan") is
hereby amended as follows:

            1. The last  sentence of Section  2.27 of the Plan is amended in its
entirety to read as follows:

                        "The  value  of  the  Corporation's   common  stock  for
            purposes of this Section  2.27 with respect to any relevant  date of
            determination  shall be determined in the same manner as provided in
            the Savings Program."

            2. The provisions of this First  Amendment  shall be effective as of
January 1, 1995.

                                      UNION CARBIDE CORPORATION



                                       By: /s/ M.A. Kessenger
                                           -------------------------------------



                           SECOND AMENDMENT TO THE
                                UNION CARBIDE
                        COMPENSATION DEFERRAL PROGRAM

            The Union  Carbide  Compensation  Deferral  Program  (the "Plan") is
hereby amended as follows:

            1.  Section  8.02 of the Plan is amended by adding a new  subsection
(d) to read as follows:

                        "(d)   Notwithstanding   subparagraph   (b)   above,   a
            Participant  who either (i) is subject to Section 16 of the Exchange
            Act or (ii) is deemed  subject to Section 16 of the  Exchange Act by
            the  Committee,  may utilize the UCC Stock Value Rate at the time of
            his or her  election  to  defer  any  amounts  under  this  Program;
            provided, however, that such allocated amounts shall not be eligible
            for  reallocation to another accrual rate under this Section 8.2 for
            a period of 6 months from the Date of Deferral."

            2. The provisions of this Second  Amendment shall be effective as of
August 15, 1996.

                                       UNION CARBIDE CORPORATION



                                       By: /s/ M.A. Kessenger
                                           -------------------------------------



                              THIRD AMENDMENT TO THE
                                  UNION CARBIDE
                          COMPENSATION DEFERRAL PROGRAM


            The Union  Carbide  Compensation  Deferral  Program  (the "Plan") is
hereby amended as follows:

          1. Section 6.4: of the Plan is hereby  amended in its entirety to read
as follows:

                  "6.4:  PAYMENT  MEDIUM.  All payments  under this Program with
            respect  to  amounts  which  (i) at the  time of such  payment  were
            accruing  at  the  Fixed  Income  Rate,  or  an  Applicable   Equity
            Investment  Fund Rate, or (ii) at the time of such payment,  if such
            payment is made before  December 31, 1996,  were  accruing at either
            the UCC Stock  Value Rate or the UCC  Discounted  Stock  Value Rate,
            shall be made in U.S. dollars.  Effective for any payments made to a
            Participant  who is or has  been an  executive  officer  within  the
            meaning of the  Exchange Act on or after  December  31,  1996,  with
            respect to amounts which were accruing at either the UCC Stock Value
            Rate or the UCC Discounted  Stock Value Rate,  such payment shall be
            made in shares of common stock of the Corporation."

          2.  Section 6.5 of the Plan is hereby  amended in its entirety to read
as follows:

                  "6.5: REDUCTION OF PAYMENTS: SHARE WITHHOLDING. (a) All
            payments under this Program shall be reduced by any and all amounts
            that the Corporation is required to withhold pursuant to applicable
            law.

                  (b) In order to enable the  Corporation to meet any applicable
            federal, state or local tax withholding requirements,  a Participant
            (or Beneficiary) who is receiving  payment in shares of common stock
            of the  Corporation,  may  elect  to have the  Corporation  withhold
            shares that would otherwise be delivered to such Participant,  or by
            delivering  to the  Corporation  other shares of common stock of the
            Corporation  owned by the Participant.  The value of any such shares
            of common stock to be withheld by the  Corporation,  or so delivered
            to the Corporation,  shall be the mean of the high and low prices of
            the common  stock of the  Corporation  as  reported  in the New York
            Stock Exchange - Composite Transactions on the date of payment."

            3. The provisions of this Third  Amendment  shall be effective as of
December 31, 1996.

            As hereby amended, the Union Carbide  Compensation  Deferral Program
shall continue in full force and effect.

                                       UNION CARBIDE CORPORATION



                                       By: /s/ M.A. Kessenger
                                           -------------------------------------



                           FOURTH AMENDMENT TO THE
                                UNION CARBIDE
                        COMPENSATION DEFERRAL PROGRAM


            The Union  Carbide  Compensation  Deferral  Program  (the "Plan") is
hereby amended as follows:

          1.  Section  2.6 of the Plan is  amended  in its  entirety  to read as
follows:

                  "2.6:  A "Change in Control of the Corporation" shall be
            deemed to occur if any of the following circumstances shall occur:

                  (i)  any  "person"  or "group"  within the meaning of Sections
                       13(d) and 14(d)(2) of the Securities Exchange Act of 1934
                       ("Act") becomes the "beneficial owner" as defined in Rule
                       13d-3  under  the  Act of  more  than  20%  of  the  then
                       outstanding voting securities of the Corporation;

                  (ii) any  "person"  or "group"  within the meaning of Sections
                       13(d)  and  14(d)(2)  of the Act  acquires  by  proxy  or
                       otherwise   the  right  to  vote  for  the   election  of
                       directors,   for  any  merger  or  consolidation  of  the
                       Corporation  or for any  other  matter or  question  with
                       respect to more than 20% of the then  outstanding  voting
                       securities of the Corporation;

                  (iii)if during any period of twenty-four  consecutive  months,
                       Present  Directors  and/or  New  Directors  cease for any
                       reason to constitute a majority of the Board.

                       For  these  purposes,   "Present  Directors"  shall  mean
                       individuals  who at the  beginning  of  such  consecutive
                       twenty-four  month  period were  members of the Board and
                       "New Directors" shall mean any director whose election by
                       the  Board  or  whose  nomination  for  election  by  the
                       Corporation's  stockholders  was approved by a vote of at
                       least  two-thirds of the  Directors  then still in office
                       who were Present Directors or New Directors;

                  (iv) the  stockholders  of the  Corporation  approve a plan of
                       complete  liquidation or dissolution of the  Corporation;
                       or

                  (v)  there shall be consummated (x) a reorganization, merger
                       or consolidation of all or substantially all of the
                       assets of the Corporation (a "Business Combination"),
                       unless, following such Business Combination, (a) all or
                       substantially all of the individuals and entities who
                       were the beneficial owners, respectively, of the
                       outstanding Common Stock of the Corporation and
                       outstanding voting securities of the Corporation
                       immediately prior to such Business Combination
                       beneficially own, directly or indirectly, more than 50%
                       of, respectively, the then outstanding shares of common
                       stock and the combined voting power of the then
                       outstanding voting securities entitled to vote generally
                       in the election of directors, as the case may be, of the
                       corporation resulting from such Business Combination
                       (including, without limitation, a corporation which as a
                       result of such transaction owns the Corporation or all
                       or substantially all of the Corporation's assets either
                       directly or through one or more subsidiaries) in
                       substantially the same proportions as their ownership,
                       immediately prior to such Business Combination of the
                       outstanding Common Stock of the Corporation and
                       outstanding voting securities of the Corporation, as the
                       case may be, (b) no Person (excluding any corporation
                       resulting from such Business Combination or any employee
                       benefit plan (or related trust) of the Corporation or
                       such corporation resulting from such Business
                       Combination) beneficially owns, directly or indirectly,
                       20% or more of, respectively, the then outstanding
                       shares of common stock of the corporation resulting from
                       such Business Combination or the combined voting power
                       of the then outstanding voting securities of such
                       corporation except to the extent that such ownership
                       existed prior to the Business Combination and (c) at
                       least a majority of the members of the board of
                       directors of the corporation resulting from such
                       Business Combination were members of the Board at the
                       time of the execution of the initial agreement, or of
                       the action of the Board, providing for such Business
                       Combination; or (y) any sale, lease, exchange or other
                       transfer (in one transaction or a series of related
                       transactions) of all, or substantially all, of the
                       assets of the Corporation, provided, that the
                       divestiture of less than substantially all of the assets
                       of the Corporation in one transaction or a series of
                       related transactions, whether effected by sale, lease,
                       exchange, spin-off, sale of the stock or merger of a
                       subsidiary or otherwise, shall not constitute a Change
                       in Control.

                  Notwithstanding  the foregoing,  a Change in Control shall not
            be deemed to occur  pursuant  to  Subparagraphs  (i) and (ii) above,
            solely because  twenty percent (20%) or more of the combined  voting
            power of the Corporation's  then outstanding  securities is acquired
            by  one  or  more   employee   benefit   plans   maintained  by  the
            Corporation."

            2. The provisions of this Fourth Amendment shall  be-effective as of
January 1, 1997.

            As hereby amended, the Union Carbide  Compensation  Deferral Program
shall continue in full force and effect.

                                       UNION CARBIDE CORPORATION



                                       By: /s/ M.A. Kessenger
                                           -------------------------------------