SECURITIES AND EXCHANGE COMMISSION
                     Washington, D.C.  20549


                            FORM 11-K

(Mark One)

[X]  Annual Report pursuant to Section 15 (d) of the Securities
     Exchange Act of 1934

     For the calendar year ended December 31, 2001

                               OR

[ ]  Transition report pursuant to Section 15 (d) of the
     Securities Exchange Act of 1934

     For the transition period from ________ to _________

     Commission file number 0-30270

A.   Full title of the Plan and the address of the Plan, if
     different from that of the issuer named below:

                      CROMPTON CORPORATION
                  EMPLOYEE STOCK OWNERSHIP PLAN

B.   Name of issuer of the securities held pursuant to the Plan
     and the address of its principal executive office:

                      Crompton Corporation
                        One American Lane
                  Greenwich, Connecticut  06831




                      CROMPTON CORPORATION
                  EMPLOYEE STOCK OWNERSHIP PLAN

                  Index to Financial Statements


Independent Auditors' Report

Statements of Net Assets Available for Plan Benefits as of
December 31, 2001 and 2000

Statements of Changes in Net Assets Available for Plan Benefits
for the Years Ended December 31, 2001 and 2000

Notes to Financial Statements

Supplemental Schedules:

Schedule H, Line 4i - Schedule of Assets (Held at End of Year)

Schedule H, Line 4j - Schedule of Reportable Transactions

Schedule G, Part III - Nonexempt Transactions



Signature

Exhibit 23 - Consent of KPMG LLP, Independent Auditors





                      CROMPTON CORPORATION

                  EMPLOYEE STOCK OWNERSHIP PLAN

         Financial Statements and Supplemental Schedules

                   December 31, 2001 and 2000

           (With Independent Auditors' Report Thereon)





                      CROMPTON CORPORATION
                  EMPLOYEE STOCK OWNERSHIP PLAN





                              INDEX


Independent Auditors' Report


Statements of Net Assets Available for Plan Benefits as of
December 31, 2001 and 2000


Statements of Changes in Net Assets Available for Plan Benefits
for the Years Ended December 31, 2001 and 2000


Notes to Financial Statements



Supplemental Schedules:

Schedule H, Line 4i - Schedule of Assets (Held at End of Year)

Schedule H, Line 4j - Schedule of Reportable Transactions

Schedule G, Part III - Nonexempt Transactions




                    Independent Auditors' Report


The Board of Directors
Crompton Corporation:

We  have  audited the accompanying statements of net assets
available for  plan  benefits of Crompton Corporation Employee
Stock  Ownership Plan  (the "Plan") as of December 31, 2001
and 2000, and the  related statements  of changes in net
assets available for plan benefits  for the   years  then
ended.   These  financial  statements are the responsibility
of the Plan's management.  Our responsibility  is  to express
an opinion on these financial statements based on our audits.

We  conducted  our  audits  in  accordance  with  auditing
standards generally  accepted in the United States of America.
Those standards require  that  we  plan  and perform the audit
to  obtain  reasonable assurance about whether the financial
statements are free of material misstatement.  An audit
includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial  statements.
An audit also includes assessing the accounting principles
used  and significant  estimates made by management, as well
as evaluating  the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our
opinion.

In  our  opinion, the financial statements referred to above
present fairly,  in all material respects, the net assets
available for  plan benefits  as  of December 31, 2001 and
2000, and the changes  in  net assets  available  for  plan
benefits for the years  then  ended,  in conformity  with
accounting principles  generally  accepted  in  the United
States of America.

Our  audits  were performed for the purpose of forming an
opinion  on the  basic  financial statements taken as a
whole.  The supplemental schedule of  assets  (held at end
of year), schedule  of  reportable transactions,  and
schedule of nonexempt transactions  are  presented for the
purpose of additional analysis and are not a required part
of the  basic  financial  statements but are  supplementary
information required  by  the  Department of Labor's Rules
and  Regulations  for Reporting  and  Disclosure  under
the  Employee  Retirement   Income Security  Act  of  1974.
These  supplemental  schedules are the responsibility of
the Plan's management.  The supplemental  schedules have
been subjected to the auditing procedures applied in the
audits of  the  basic financial statements and, in our opinion,
are  fairly stated  in  all material respects in relation to
the basic  financial statements taken as a whole.

/s/KPMG LLP
Stamford, Connecticut
June 14, 2002



                      CROMPTON CORPORATION
                  EMPLOYEE STOCK OWNERSHIP PLAN

      Statements of Net Assets Available for Plan Benefits

         For the years ended December 31, 2001 and 2000

                                            2001        2000
   Investments, at fair value:
    Common stock of Crompton           $24,362,058   $26,735,247
     Corporation
    Fixed Income Fund                   12,071,789    12,948,033
    Mutual Funds                        18,242,752    18,225,058
   Cash and short-term investments at
    cost, which approximates market             --            47

   Contributions receivable from           333,454       439,674
    participants
   Contribution receivable from            231,246       279,821
   Crompton Corporation
   Accrued income                               --        94,720

       Net assets available for plan   $55,241,299   $58,722,600
         benefits


   See accompanying notes to financial statements



                     CROMPTON CORPORATION
                 EMPLOYEE STOCK OWNERSHIP PLAN

Statements of Changes In Net Assets Available for Plan Benefits

        For the years ended December 31, 2001 and 2000

                                            2001          2000
Additions
  Additions to net assets attributed to:
    Interest and dividends             $  1,426,720  $ 2,926,855

    Contributions:
       Participant rollovers                 37,881        3,646
       Participants                       5,217,557    5,838,726
       Employer                           3,378,177    3,733,416

         Total additions                 10,060,335   12,502,643

Deductions

  Deductions from net assets attributed to:

    Net depreciation in fair value of    (5,354,656)  (8,413,328)
     investments
    Withdrawals and distributions        (8,150,844) (11,116,800)
    Administrative expenses                 (36,136)     (55,280)
         Total deductions               (13,541,636) (19,585,408)

    Net decrease                         (3,481,301)  (7,082,765)

Net assets available for plan benefits at
the beginning of the year                58,722,600   65,805,365

  Net assets available for plan benefits
   at the end of the year               $55,241,299  $58,722,600


See accompanying notes to financial statements



                      CROMPTON CORPORATION
                  EMPLOYEE STOCK OWNERSHIP PLAN

                  Notes to Financial Statements

                    December 31, 2001 and 2000

1.  Basis of Presentation
    The  accompanying financial statements have been prepared  on
    the  accrual basis of accounting and present the  net  assets
    available for plan benefits and changes in those net assets.

2.  Plan Description
    The  Employee Stock Purchase and Savings Plan was adopted  by
    the   Board   of  Directors  of  Crompton  Corporation   (the
    "Company") on January 27, 1976.  Effective July 1, 1989,  the
    Board  of  Directors amended the Plan to convert it  into  an
    Employee  Stock Ownership Plan (the "Plan").   The  following
    description  of  the Plan provides only general  information.
    For complete information see the Plan document.  The Plan  is
    a  defined contribution plan and is subject to the provisions
    of  the  Employee Retirement Income Security Act of 1974,  as
    amended (ERISA).

    The  Plan  is administered by the Employee Benefits Committee
    consisting of persons appointed by the Board of Directors  of
    the Company.

    Beginning in 2001, Fidelity Investments (r) (the "Trustee")
    was selected  by the Company as custodial trustee for a
    majority of  the  Plan  assets.  Prior to 2001,  Fleet  Bank
    was  the custodial  trustee  of the Plan.  The Trustee  has
    custodial responsibility  for a trust fund on behalf of
    the  Plan  and maintains accounting records for all Plan
    assets.

    Eligibility
    Employees  of  participating affiliates of  the  Company  are
    eligible  to  participate upon attaining the age  of  18  and
    having  worked  for  at least a thirty (30)  consecutive  day
    period of employment.

    Contributions and Vesting
    The Plan permits an eligible employee to elect to participate
    by  authorizing a withholding of an amount equal to  1%,  2%,
    3%, 4%, 5% or 6% of compensation as the basic contribution to
    the  Plan.  Contributions by the Company to the Plan are made
    at   an  amount  equal  to  66  2/3%  of  each  participating
    employee's  basic  employee contribution  to  the  Plan.   If
    participants   are  not  eligible  for  any   other   defined
    contribution  plan, additional employee contributions  in  1%
    increments  up  to  10%  of  compensation  can  be  made   as
    supplemental  employee  contributions. Supplemental  employee
    contributions   are   not  eligible  for   matching   Company
    contributions.

    A  participant in the Plan is fully vested in his  basic  and
    supplemental contributions.  Employer contributions vest 100%
    over  a five-year period at a rate of 40% after two years  of
    service   and   an   additional  20%  per  year   thereafter.
    Forfeitures  are  accumulated  and  used  to  reduce  Company
    contributions.  There were no forfeitures in 2001 and 2000.

    Withdrawals/Benefit Payments
    Upon termination, death, or retiring, a participant's account
    shall be distributed.  However, funds can remain in the  Plan
    after  retirement  indefinitely  with  quarterly  withdrawals
    permitted and as long as funds begin to be distributed  after
    the participant reaches the age of 70 1/2.

    A  participant may elect to make one withdrawal of his  basic
    or   supplemental   contributions  in  a   12-month   period.
    Withdrawal of basic contributions will cause a suspension  of
    contributions for a three-month period.  A participant who is
    fully  vested  and  has  withdrawn  all  of  his  basic   and
    supplemental contributions may also elect to withdraw all  or
    part  of  his employer contributions.  Withdrawal of employer
    contributions  will result in a suspension  of  contributions
    for a six-month period.

    The Plan does not allow for participant loans.

    Investments Options
    The  Company's  contribution to the Plan is invested  in  the
    Crompton  Corporation Common Stock Fund.  The  Plan  provides
    for  investment  of employee contributions  in  the  Crompton
    Corporation  Stock  Fund and among various  investment  funds
    maintained  by  Fidelity  Investments  and  Fleet  Investment
    Management.

    Each  participant  is permitted to elect to  have  his  basic
    contribution invested in any of the funds in 1% increments.

    Fund  transfers can be made on a daily basis in a minimum  of
    1% increments.

3.  Summary of Accounting Policies
    Use of Estimates
    The  preparation  of financial statements in conformity  with
    accounting principles generally accepted in the United States
    of   America   requires  the  Plan  to  make  estimates   and
    assumptions  that affect the reported amounts of  assets  and
    liabilities   and   disclosure  of  contingent   assets   and
    liabilities at the date of the financial statements  and  the
    reported  changes in net assets available for  plan  benefits
    during  the  reporting period.  Actual results  could  differ
    from those estimates.

    Investment Valuation and Income Recognition
    The  Plan's  investments are stated at fair value except  for
    the  benefit-responsive investment contract, which is  valued
    at contract-value (Note 5).  Quoted market prices are used to
    value investments.  Shares of mutual funds are valued at  the
    net  asset value of shares held by the Plan at year-end.  The
    Crompton  Corporation stock fund is valued  at  its  year-end
    closing price.

    Net  appreciation (depreciation) in fair value of investments
    includes  investments bought and sold  and  held  during  the
    year.   Purchases and sales of securities are recorded  on  a
    trade-date basis.  Interest income is recorded on an  accrual
    basis and dividends are recorded on the ex-dividend date.

    Payment of Benefits
    Benefits are recorded when paid.

    Plan Expenses
    Plan expenses may be paid by the Company, however if not paid
    by  the  Company,  may be charged to the Plan.   The  Company
    provides administrative and accounting services for the  Plan
    at no charge.

4.  Investments
    The  Plan's  investments  that  exceeded  5%  of  net  assets
    available for plan benefits as of December 31, 2001 and  2000
    are as follows:
                                           2001         2000
    Crompton Corporation Common        $24,362,058  $26,735,247
     Stock
    Crompton  Corporation  Blended      12,071,789           --
     Income Fund
    Fidelity Magellan Fund               4,965,324           --
    Fidelity  U.S.  Equity Index         2,886,325           --
     Commingled Fund
    Hartford Life Ins. Co.
     Group Annuity Contract                     --    4,846,885
    Fleet Stable Asset Fund                     --    8,101,148
    Galaxy Growth and Income Fund               --    5,735,784

    During  2001  and  2000,  the Plan's  investments  (including
    gains  and losses on investments bought and sold, as well  as
    held  during the year) appreciated/(depreciated) in value  as
    follows:

                                         2001         2000
       Mutual Funds                ($2,241,222)    ($2,046,239)
       Common Stock of Crompton
        Corporation                ( 3,113,434)    ( 6,422,369)
                                   ($5,354,656)    ($8,468,608)

5.  Investment Contracts with Insurance Company
    The   Blended   Income   Fund  invests  in  benefit-responsive
    guaranteed  investment  contracts ("GICs")  offered  by  major
    insurance  companies and other approved financial institutions
    and  in certain types of fixed income securities.  These  GICs
    are  stated  at  contract  value, as determined  by  Fidelity,
    which  approximates  fair  value. The  average  yield  on  the
    Company's GICs was 5.93% during 2001.  The crediting  interest
    rate  on  these  GICs  was 2.43% at December  31,  2001.   The
    Blended Income Fund was not an investment option in 2000.

6.  Income Taxes
    The  Internal Revenue Service ("IRS") has determined and  has
    informed  the  Company by a letter dated November  16,  1994,
    that  the  Plan and related trust are designed in  accordance
    with   applicable  sections  of  the  Internal  Revenue  Code
    ("IRC").   The  Plan  has been amended  since  receiving  the
    determination  letter.  However, the Plan  administrator  and
    the  Plan's tax counsel believe that the Plan is designed and
    is currently being operated in compliance with the applicable
    requirements of the IRC.  The Company applied for a  new  tax
    determination  letter  in  December,  2001  and  is  awaiting
    response from the IRS.

7.  Party-in-Interest Transactions
    Fidelity  Investments  (r),  Fleet Bank  and  the  Company
    are parties-in-interest as defined in Section 3  (14)  of
    ERISA.  During  the  years  2001 and 2000, there were  no
    Prohibited party-in-interest transactions.

8.  Priorities Upon Termination of the Plan
    The  Board  of Directors of the Company shall have the  right
    from  time  to time to add to, modify or amend the Plan,  and
    the  Board of Directors shall have the right to terminate the
    Plan.   The  Board  of  Directors  may  also  authorize   the
    inclusion  in  any contract entered into by the Company  with
    the union or unions representing employees, or with any group
    or  groups of employees, of a provision or provisions  having
    the   effect  of  limiting  or  foregoing  any  such  rights.
    Further,   no   addition  to,  modification,   amendment   or
    termination of the Plan shall have the effect of reducing the
    entitlement of any participant benefit accrued under the Plan
    or  of diverting any part of the assets of the Trust Fund for
    purposes other than provided in the Plan.

    Upon  termination  of the Plan, or a complete  and  permanent
    discontinuance  of  contributions of  all  participants,  the
    value  of  each  participant account, if not already  vested,
    shall vest fully and all amounts remaining in all participant
    accounts  shall be delivered and paid as soon as  practicable
    in accordance with the Plan Document.

9.  Nonexempt Transactions

    There  were  unavoidable delays by the Company in  submitting
    January, February, and March employee contributions  for  the
    Company's subsidiary Davis Standard Corporation due  to  data
    processing  systems  complications.   The  Company  will   be
    reimbursing  the  Plan  for lost earnings  determined  by  an
    interest  calculation  based  on  the  number  of  days   the
    contributions were delayed.



                                            Schedule H, Line 4i

                      CROMPTON CORPORATION
                  EMPLOYEE STOCK OWNERSHIP PLAN

            Schedule of Assets (held at end-of-year)

                           December 31, 2001

                      Description of Investment
       Identity of    Including Maturity Date,
       Issue,         Rate of Interest,                 Current
       Borrower,      Collateral, Par or Maturity        Value
       Lessor or      Value
       Similar
       Party

       * Crompton     Common Stock                    $24,362,058
       Corporation

       * Fidelity     Blended Income Fund              12,071,789

       * Fidelity     Fidelity Magellan Fund            4,965,324

       * Fidelity     U.S. Equity Index Commingled      2,886,325
                      Fund

       * Fidelity     Fidelity Freedom 2010             2,662,243

       * Fidelity     Fidelity Growth Company Fund      2,412,249

        Dreyfus       Dreyfus Small Company Fund        1,834,882

        Dreyfus       Dreyfus Premium Core Bond         1,233,088

        Putnam        Putnam Int'l Growth Fund A        1,137,351
         Investments

       * Fidelity     MSIFT Equity Fund                   655,179

       * Fidelity     Fidelity Freedom 2020               201,717

       * Fidelity     Dodge & Cox Stock                    65,666

        Galaxy        Galaxy Growth II Fund                57,591

       * Fidelity     Fidelity Freedom 2030                56,766

       * Fidelity     Fidelity Freedom Income              39,103

        Dreyfus       Dreyfus Founders Discovery A         20,699

       * Fidelity     Fidelity Freedom 2040                 7,829

       * Fidelity     Fidelity Freedom 2000                 6,740

                                  TOTAL INVESTMENTS   $54,676,599

* Denotes a party-in-interest to the Plan
* See accompanying independent auditors' report



                                              Schedule H, Line 4j


                          CROMPTON CORPORATION
                      EMPLOYEE STOCK OWNERSHIP PLAN

                   Schedule of Reportable Transactions

                   For the year ended December 31, 2001

Identity  Description   Purchase  Selling   Cost of
of Party      of          Price   Price      Asset
Involved    Asset

Current Value of Asset     Net Gain/(Loss)
on Transaction Date



                   *** No reportable transactions ***


Party-in-interest - All parties listed above



                                         Schedule G, Part III


                              CROMPTON CORPORATION
                          EMPLOYEE STOCK OWNERSHIP PLAN

                             Nonexempt Transactions

                          Year ended December 31, 2001


(a) Identity of        (b) Relationship to   (c) Description of
    party involved         plan, employer        transactions
                           or other party-       including
                           in-interest           maturity date,
                                                 rate of interest,
                                                 collateral, par
                                                 or maturity value

Crompton Corporation      Plan Sponsor          Overdue employee
                                                contributions not
                                                time remitted to
                                                the Plan (see also
                                                note 9 to the
                                                financial
                                                statements)

(d) Purchase Price    (e) Sell Price        (f) Lease rental
    $542,899*             N/A                   N/A

(g) Expenses incurred (h) Cost of asset     (i) Current value
    in connection                               of asset
    with transaction
    N/A                    N/A                  $542,899

(j) Net gain or (loss)
    on each transaction
    N/A


*This represents total amount of contributions that have
been withheld from employees, but not remitted timely into
trust by the Plan Sponsor.


See accompanying independent auditor's report.






                          SIGNATURE




     The Plan.  Pursuant to the requirements of the Securities
and Exchange Act of 1934, the trustees (or other persons who
administer the employee benefit plan) have duly caused this
annual report to be signed on its behalf by the undersigned
hereunto duly authorized.



                      CROMPTON CORPORATION
                  EMPLOYEE STOCK OWNERSHIP PLAN





Date:  June 27, 2002             By:/s/Peter Barna
                                 Peter Barna
                                 Senior Vice President &
                                 Chief Financial Officer