<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from Union
Carbide Corporation's Form 10-Q for the quarter ended June 30, 1999, 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-31-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                              41
<SECURITIES>                                         0
<RECEIVABLES>                                     1075
<ALLOWANCES>                                         0
<INVENTORY>                                        599
<CURRENT-ASSETS>                                  1962
<PP&E>                                            8714
<DEPRECIATION>                                    4363
<TOTAL-ASSETS>                                    7465
<CURRENT-LIABILITIES>                             1362
<BONDS>                                           2044
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           157
<OTHER-SE>                                        2284
<TOTAL-LIABILITY-AND-EQUITY>                      7465
<SALES>                                           2820
<TOTAL-REVENUES>                                  2820
<CGS>                                             2157
<TOTAL-COSTS>                                     2157
<OTHER-EXPENSES>                                   275<F1>
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  66
<INCOME-PRETAX>                                    238
<INCOME-TAX>                                        59
<INCOME-CONTINUING>                                127
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                           20
<NET-INCOME>                                       107
<EPS-BASIC>                                       0.80<F2>
<EPS-DILUTED>                                     0.79<F2>
<FN>
<F1>Other expenses are equal to research and development of 76 and depreciation and
amortization of 199.
<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>