<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from Union
Carbide Corporation's Form 10-Q for the quarter ended June 30, 2000, 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>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                              59
<SECURITIES>                                         0
<RECEIVABLES>                                     1166
<ALLOWANCES>                                         0
<INVENTORY>                                        743
<CURRENT-ASSETS>                                  2269
<PP&E>                                            9303
<DEPRECIATION>                                    4687
<TOTAL-ASSETS>                                    8417
<CURRENT-LIABILITIES>                             2180
<BONDS>                                           1758
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           158
<OTHER-SE>                                        2627
<TOTAL-LIABILITY-AND-EQUITY>                      8417
<SALES>                                           3291
<TOTAL-REVENUES>                                  3291
<CGS>                                             2668
<TOTAL-COSTS>                                     2668
<OTHER-EXPENSES>                                   282<F1>
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  82
<INCOME-PRETAX>                                    197
<INCOME-TAX>                                        49
<INCOME-CONTINUING>                                227
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       227
<EPS-BASIC>                                       1.68
<EPS-DILUTED>                                     1.65
<FN>
<F1>Other expenses are equal to research and development of $78 and depreciation
and amortization of $204.
</FN>