<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from Union
Carbide Corporation's Form 10-Q for the quarter ended September 30, 1998, and is
qualified in its entirety by reference to such financial statements.
</LEGEND>
<CIK> 0000100790
<NAME> UNION CARBIDE CORPORATION
<MULTIPLIER> 1,000,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                              45
<SECURITIES>                                         0
<RECEIVABLES>                                      920
<ALLOWANCES>                                         0
<INVENTORY>                                        602
<CURRENT-ASSETS>                                  1851
<PP&E>                                            8209
<DEPRECIATION>                                    4144
<TOTAL-ASSETS>                                    7075
<CURRENT-LIABILITIES>                             1408
<BONDS>                                           1703
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           155
<OTHER-SE>                                        2217
<TOTAL-LIABILITY-AND-EQUITY>                      7075
<SALES>                                           4370
<TOTAL-REVENUES>                                  4370
<CGS>                                             3284
<TOTAL-COSTS>                                     3284
<OTHER-EXPENSES>                                   395<F1>
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  84
<INCOME-PRETAX>                                    541
<INCOME-TAX>                                       168
<INCOME-CONTINUING>                                336
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       336
<EPS-PRIMARY>                                     2.47<F2>
<EPS-DILUTED>                                     2.41<F2>
<FN>
<F1>Other expenses ae equal to research and development of 107 and depreciation and
amortization of 288.
<F2>The EPS-PRIMARY amount represents basic earnings per share and the EPS-DILUTED
amount represents diluted earnings per share, computed in accordance with
Statement of Financial Accounting Standards No. 128, "Earnings Per Share."
</FN>