Exhibit 10.2.1


              1984 UNION CARBIDE STOCK OPTION PLAN

                   Effective January 1, 1984,

                as amended through March 1, 1988

              1984 UNION CARBIDE STOCK OPTION PLAN
Section 1:  Purpose.  The purpose of the 1984 Union Carbide Stock 
Option Plan (hereinafter referred to as the "Plan") is to (a) 
provide incentives and rewards to those employees who are in a 
position to contribute to the long-term growth and profitability 
of the Corporation; (b) assist the Corporation and its 
subsidiaries in attracting, retaining, and motivating employees 
with experience and ability; and (c) make the Corporation's 
compensation program competitive with those of other major 
employers.

Section 2:  Administration.  This Plan shall be administered by a 
Committee of the Board of Directors (hereinafter referred to as 
the "Committee") appointed by the Board.  Members of the 
Committee are not eligible to participate in this Plan and no 
member may have been eligible within one year prior to serving on 
the Committee.  The Committee shall interpret the Plan, establish 
administrative regulations to further the purpose of the Plan, 
authorize awards to eligible participants and take any other 
action necessary to the proper operation of the Plan.  All 
decisions and acts of the Committee shall be final and binding 
upon all participants.

Section 3:  Participation.  This Plan is for Union Carbide 
Corporation and such of its participating subsidiary companies as 
shall be designated by the Board of Directors.  Any employee of 
Union Carbide Corporation or a participating subsidiary serving 
in a managerial, administrative, or professional position which 
is recommended to, and authorized by, the Committee shall be 
eligible to participate in the Plan.

Section 4:  Awards.  Awards under this Plan may be stock option 
awards, stock appreciation rights and exercise payment rights.

Section 5:  Stock Options.
     5.1:  Each year during the Plan the Corporation may award 
options to purchase common stock or restricted stock of the 
Corporation (herein called "stock option awards") to such 
eligible employees as the Committee in its discretion authorizes 
and under such terms as it establishes.
     5.2:  The total number of shares of stock (including 
restricted stock, if any) optioned under this Plan during the 
five year period of the Plan shall not exceed 5,000,000 shares 
(9,564,435 shares for the period commencing March 3, 1986 through 
December 31, 1988), and no participant shall be granted options 
in any one year for, in the aggregate, more than 50,000 shares 
(150,000 shares for the period commencing March 3, 1986 through 
December 31, 1988) including restricted shares, if any.  Solely 
for the purpose of computing the total number of shares of stock 
optioned under this Plan, there shall not be counted any shares 
covered by an option which, prior to such computation, has 
terminated because the holder exercised a stock appreciation 
right or the holder ceased for any reason other than death or 
retirement to be an employee of the Corporation or a 
participating subsidiary.
     5.3:  The option price of each share of stock subject to a 
stock option award shall be the closing price of the common stock 
of the Corporation on the date the award is authorized by the 
Committee as reported in the New York Stock Exchange - Composite 
Transactions.
     5.4:  A stock option by its terms shall not be transferable 
by the participant other than by will or the laws of descent and 
distribution, shall be of no more than 10 years' duration, and 
shall be exercisable only after the earlier of:  (i)(a) in the 
case of options granted prior to October 28, 1987, two years 
following the date of grant of such award, or (b) in the case of 
options granted on or after October 28, 1987, such period of time 
as the Committee shall determine but in no event less than one 
year following the date of grant of such award; (ii) the 
participant's death; (iii) the participant's retirement; or (iv) 
a change in control of the Corporation, but only to the extent 
permitted under subsection 5.7.  An option shall be exercisable 
following a participant's termination of employment by the 
Corporation other than for cause only after such option otherwise 
becomes exercisable in accordance with the first sentence of this 
Section 5.4.  An option is exercisable during a participant's 
lifetime only by the participant or the participant's legal 
guardian or legal representative.
     An option is only exercisable by a participant while the 
participant is in active employment with the Corporation except 
(i) in the case of a participant's death, (ii) in the case of a 
participant's retirement, (iii) in the case of a participant's 
termination of employment by the Corporation other than for 
cause, (iv) during a two-year period commencing on the date of 
termination, by the participant or the Corporation, of employment 
after a change in control of the Corporation, unless such 
termination of employment is for cause, or (v) if the Committee 
decides that it is in the best interest of the Corporation to 
permit individual exceptions.  In the case of a participant's 
death, an option may be exercised within nine months after such 
death and in the case of a participant's termination of 
employment other than for cause under subclause (iii) of this 
sentence, an option may be exercised only within three years 
after such termination.
     5.5:  An option may be exercised with respect to part or all 
of the shares subject to the option by giving written notice to 
the Corporation of the exercise of the option.  The option price 
for the shares for which an option is exercised shall be paid on 
or within ten business days after the date of exercise in cash, 
in whole shares of common stock of the Corporation owned by the 
participant prior to exercising the option, or in a combination 
of cash and such shares of common stock.  The value of any share 
of common stock delivered in payment of the option price shall be 
its Market Price on the date the option is exercised.
     5.6:  In the event of any change in capital, shares of 
capital stock, or any special distribution to the stockholders, 
the Board of Directors shall make equitable adjustments in the 
number of shares and prices per share applicable to options then 
outstanding and in the number of shares which are available 
thereafter for stock option awards in total or to any one 
participant.
     5.7:  Clauses (iii) and (iv) of the first sentence of 
Section 5.4 herein, as amended and restated, shall not apply to a 
stock option held by a "disqualified individual" within the 
meaning of Section 280G(c) of the Internal Revenue Code who is a 
party to an employment contract with the Corporation that grants 
such person severance benefits in the event that the employment 
is terminated subsequent to a change in control of the 
Corporation, or who is entitled to receive benefits pursuant to a 
severance plan in the event that the participant's employment is 
terminated after a change in control to the extent that the 
exercise of the option would cause such person to incur the tax 
prescribed in Section 4999 of the Internal Revenue Code on 
"excess parachute payments" within the meaning of Section 280G(b) 
of the Internal Revenue Code.

Section 6:  Stock Appreciation Rights.
     6.1:  The Committee may, in its discretion, grant stock 
appreciation rights to employees who have received a stock option 
award.  The stock appreciation rights may relate to such number 
of shares, not exceeding the number of shares that the employee 
may acquire upon exercise of a related stock option, as the 
Committee determines in its discretion.  Upon exercise of a stock 
option by an employee, the stock appreciation rights relating to 
the shares covered by such exercise shall terminate.  Upon 
termination of a stock option, any unexercised stock appreciation 
rights related to that option shall also terminate.  Upon 
exercise of stock appreciation rights, such rights and the 
related option to the extent of an equal number of shares shall 
terminate.
     6.2:  The Committee at its discretion may revoke at any time 
any unexercised stock appreciation rights granted to an employee 
under this Plan, without compensation to such employee.  
Revocation of an employee's stock appreciation rights under this 
section shall not affect any related stock options granted to the 
employee under this Plan.
     6.3:  Upon an employee's exercise of some or all of the 
employee's stock appreciation rights, the employee shall receive 
an amount equal to the value of the stock appreciation for the 
number of rights exercised, payable in cash, common stock, 
restricted stock, or a combination thereof, at the discretion of 
the Committee.
     6.4:  The Committee shall have the discretion either to 
determine the form in which payment of a stock appreciation right 
will be made, or to consent to or disapprove the election of the 
employee to receive cash in full or partial settlement of the 
right.  Such consent or disapproval may be given at any time 
before or after the election to which it relates.  
Notwithstanding the foregoing provision, if an employee exercises 
a stock appreciation right during the 60-day period commencing on 
the date of a change in control of the Corporation, the form of 
payment of such stock appreciation right shall be cash provided 
that such stock appreciation right was granted at least six 
months prior to the date of exercise, and shall be common stock 
if such stock appreciation right was granted six months or less 
prior to the date of exercise.  Provided, however, that the 
previous sentence shall not apply to a "disqualified individual" 
within the meaning of Section 280G(c) of the Internal Revenue 
Code who is a party to an employment contract with the 
Corporation that grants such person severance benefits in the 
event that his employment is terminated subsequent to a change in 
control of the Corporation or who is entitled to receive benefits 
pursuant to a severance plan in the event that his employment is 
terminated after a change in control, to the extent that the 
exercise of the stock appreciation right would cause such 
participant to incur the tax prescribed in Section 4999 of the 
Internal Revenue Code on "excess parachute payments" within the 
meaning of Section 280G(b) of the Internal Revenue Code.
     6.5:  Except in the case of a stock appreciation right that 
was granted at least six months prior to exercise and that is 
exercised for cash during the 60-day period commencing on the 
date of a change in control of the Corporation, any election by 
the employee to receive cash in full or partial settlement of the 
stock appreciation right, as well as any exercise by the employee 
of the employee's stock appreciation right for such cash, shall 
be made only during the period beginning on the third business 
day following the date of release of the quarterly or annual 
summary statements of sales and earnings and ending on the 
twelfth business day following such date.
     6.6:  Settlement for exercised stock appreciation rights may 
be deferred by the Committee in its discretion to such date and 
under such terms and conditions as the Committee may determine.
     6.7:  A stock appreciation right is only exercisable during 
the period when the stock option to which it is related is also 
exercisable.

Section 7:  Exercise Payments.
     7.1:  The Committee may, in its discretion, grant to holders 
of stock options the right to receive exercise payments relating 
to such number of shares covered by the holder's stock options as 
the Committee determines in its discretion; provided, however, 
that the exercise payment rights granted to each participant 
under the Plan in any year shall be limited to optioned stock 
having a total option price not exceeding $100,000 plus any 
unused carryovers.  The "carryover" from any year shall be one 
half of the amount by which $100,000 exceeds the total option 
price of the stock which was accompanied by exercise payment 
rights and for which a participant was granted an option in such 
year under this Plan or any prior incentive compensation plan of 
the Corporation.  A carryover may be used only in the three 
calendar years immediately succeeding the year in which it 
accrued.  The amount of options granted in any calendar year 
under this Plan shall be treated as first using up the $100,000 
limitation and then as using up unused carryovers to such year in 
the order of the calendar years in which the carryovers accrued. 
 A carryover shall not accrue for a participant for any calendar 
year in which the participant was not granted a stock option 
award.
     7.2:  At the discretion of the Committee, the exercise 
payment may be made in cash, common stock, restricted stock, or a 
combination thereof; provided, however, exercise payments may be 
made in cash to participants subject to Section 16(b) of the 
Securities Exchange Act of 1934 only if they exercise the related 
stock option during a period beginning on the third business day 
following the date of release of the quarterly or annual summary 
statements of sales and earnings and ending on the twelfth 
business day following such date.  Exercise payments shall be 
paid within 20 business days following the exercise of a related 
stock option; provided, however, that payment may be deferred by 
the Committee in its discretion to such date and under such terms 
and conditions as the Committee may determine.
     7.3:  Exercise payments shall be paid only upon the exercise 
of related stock options which are exercised by the holder while 
an active employee; provided, however, that in the case of an 
option holder's death or retirement, exercise payments will be 
paid if such related stock options are exercised within nine 
months after death or three months after retirement, as the case 
may be, but before the expiration of the stock option's term.

Section 8:  General Provisions.
     8.1:  Any assignment or transfer of any awards without the 
written consent of the Corporation shall be null and void.
     8.2:  Nothing contained herein shall require the Corporation 
to segregate any monies from its general funds, or to create any 
trusts, or to make any special deposits for any immediate or 
deferred amounts payable to any participant for any year.
     8.3:  Participation in this Plan shall not affect the 
Corporation's right to discharge a participating employee.

Section 9:  Definitions.
     9.1:  A 'change in control of the Corporation' shall be 
deemed to occur in the event that any of the following 
circumstances have occurred:
(i)  if a change in control of the Corporation 
would be required to be reported in response 
to Item 1(a) of the Current Report on Form 
8-K, as in effect on the date hereof, 
pursuant to Sections 13 or 15(d) of the 
Securities Exchange Act of 1934, as amended 
(the 'Exchange Act'), whether or not the 
Corporation is then subject to such reporting 
requirement;

(ii) any 'person' or 'group' within the 
meaning of Sections 13(d) and 14(d)(2) of the 
Exchange Act (x) becomes the 'beneficial 
owner' as defined in Rule 13d-3 under the 
Exchange Act of more than 35% of the then 
outstanding voting securities of the 
Corporation, otherwise than through a 
transaction or transactions arranged by, or 
consummated with the prior approval of, the 
Board or (y) 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, more than 35% of the then 
outstanding voting securities of the 
Corporation, otherwise than through an 
arrangement or arrangements consummated with 
the prior approval of the Board;

(iii)if during any period of twenty-four 
consecutive months (not including any period 
prior to the adoption of this section), 
Present Directors and/or New Directors cease 
for any reason to constitute a majority of 
the Board.  For purposes of this subsection 
(iii), '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; or

(iv) any 'person' or 'group' within the 
meaning of Sections 13(d) and 14(d)(2) of the 
Exchange Act that is the 'beneficial owner' 
as defined in Rule 13d-3 under the Exchange 
Act of 20% or more of the then outstanding 
vesting securities of the Corporation 
commences soliciting proxies.

     9.2:  "Employee" means all employees of the Corporation or 
of a subsidiary of the Corporation participating in the Plan, 
including officers of the Corporation, as well as officers of the 
Corporation who are also Directors of the Corporation.  However, 
an individual who is a member of the Committee shall not be an 
"employee" for purposes of this Plan.
     9.3:  "Exercise payment" is a payment upon the exercise of a 
stock option of an amount determined by the Committee in its 
discretion, which amount shall not be greater than 60% of the 
excess of the Market Price (on the date the related stock option 
is exercised) over the option price of the stock acquired upon 
the exercise of the option.
     9.4:  "Market price" is 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 the 
option or stock appreciation right is exercised (or on the next 
preceding day such stock was traded on a stock exchange included 
in the New York Stock Exchange - Composite Transactions if it was 
not traded on any such exchange on the date the option or stock 
appreciation right is exercised), except that in the case of a 
stock appreciation right that is exercised for cash during the 
first three days of the ten-day period set forth in Section 6.5, 
"Market Price" is the highest daily closing price of the common 
stock of the Corporation as reported in the New York Stock 
Exchange-Composite Transactions during such ten-day period.  
Notwithstanding the foregoing provision, if a stock appreciation 
right is exercised during the 60-day period commencing on the 
date of a change in control of the Corporation, the Market Price 
for purposes of determining the stock appreciation shall be the 
highest of (1) the market price of the common stock of the 
Corporation, as determined under the preceding sentence on the 
date of exercise of the stock appreciation right; (2) the highest 
market price of a share of the common stock of the Corporation 
during the period commencing on the ninetieth day preceding the 
date of exercise of the stock appreciation right and ending on 
the date of exercise of the stock appreciation right; (3) the 
highest price per share of common stock of the Corporation shown 
on Schedule 13D or an amendment thereto filed pursuant to Section 
13(d) of the Securities Exchange Act of 1934 by any person 
holding 35% of the combined voting power of the Corporation's 
then outstanding voting securities; or (4) the highest price paid 
or to be paid per share of common stock of the Corporation 
pursuant to a tender or exchange offer as determined by the 
Committee.  Provided, however, that the previous sentence shall 
not apply to a 'disqualified individual' within the meaning of 
Section 280G(c) of the Internal Revenue Code who prior to 
December 1, 1986 is a party to an employment contract with the 
Corporation that grants such person severance benefits in the 
event that the employment is terminated subsequent to a change in 
control of the Corporation, and after that date shall not apply 
if the exercise of the stock appreciation right would cause such 
participant to incur the tax prescribed in Section 4999 of the 
Internal Revenue Code on 'excess parachute payments' within the 
meaning of Section 280G(b) of the Internal Revenue Code.
     9.5:  "Retirement" shall mean retirement from employment by 
the Corporation or a participating subsidiary with the right to 
receive immediately a non-actuarially reduced pension under the 
Corporation's Retirement Program.
     9.6:  "Restricted stock" means stock of the Corporation 
subject to restrictions on the transfer of such stock, conditions 
of forfeitability of such stock, or any other limitations or 
restrictions as determined by the Committee.
     9.7:  "Stock Appreciation" shall be based on the excess of 
the Market Price of the common stock over the option price of the 
related option stock, as determined by the Committee.

Section 10:  Amendment, Suspension, or Termination.
     10.1:  The Board of Directors may suspend, terminate, or 
amend the Plan, but may not, without approval by the holders of a 
majority of all outstanding shares entitled to vote on the 
subject at a meeting of stockholders of Union Carbide 
Corporation, increase the total number of shares of stock that 
may be optioned under this Plan or that may be optioned to a 
single participant during the term of this Plan.
     10.2:  This Plan is intended to comply with the requirements 
of Rule 16b-3 under the Securities Exchange Act of 1934, as 
applicable during the term of this Plan.  Should the requirements 
of Rule 16b-3 change, the Board of Directors may amend this Plan 
to comply with the requirements of that rule or its successor 
provision or provisions.

Section 11:  Effective Date and Duration of the Plan.
     This Plan shall be effective following approval by the 
stockholders of the Corporation for years beginning on or after 
January 1, 1984.  No award shall be granted under this Plan for 
any year commencing on or after January 1, 1989.