EXHIBIT 21 LIST OF SUBSIDIARIES The following is a list of the Registrant's subsidiaries at December 31, 1996, other than certain subsidiaries that did not in the aggregate constitute a significant subsidiary. JURISDICTION OF NAME FORMATION - ---- --------------- B & D Cogen Funding Corp. Delaware Compania Occidental de Hidrocarburos, Inc. California Glenn Springs Holdings, Inc. Delaware Laurel Industries, Inc. Ohio MC Exploration Corporation Delaware MC Leasing, Inc. Delaware MC Panhandle, Inc. Delaware MidCon Corp. Delaware MidCon Exploration Company Delaware MidCon Gas Services Corp. Delaware MidCon Texas Gas Limited, Inc. Delaware MidCon Texas Pipeline, L.P. Delaware MidCon Texas Pipeline Operator, Inc. Delaware Natural Gas Odorizing, Inc. Oklahoma Natural Gas Pipeline Company of America Delaware NGPL Offshore Company Delaware NGPL-Canyon Compression Co. Delaware NGPL-Trailblazer Inc. Delaware Occidental C.O.B. Partners Delaware Occidental Chemical Chile S.A.I. Chile Occidental Chemical Corporation New York Occidental Chemical Europe, S.A. Belgium Occidental Chemical Holding Corporation California Occidental Chemical International, Inc. California Occidental Crude Sales, Inc. Delaware Occidental de Colombia, Inc. Delaware Occidental Exploration and Production Company California Occidental International Exploration and Production Company California Occidental Netherlands, Inc. Delaware Occidental of Oman, Inc. Liberia Occidental of Russia Ltd. Bermuda Occidental Oil and Gas Corporation California Occidental Peninsula, Inc. Delaware Occidental Peruana, Inc. California Occidental Petroleum (Malaysia) Ltd. Bermuda Occidental Petroleum (Pakistan), Inc. Delaware Occidental Petroleum (South America), Inc. Delaware Occidental Petroleum Investment Co. California Occidental Petroleum of Qatar Ltd. Bermuda Occidental Philippines, Inc. California Occidental Quimica do Brasil Ltda. Brazil Occidental Receivables, Inc. California Occidental Tower Corporation Delaware Oxy CH Corporation California Oxy Chemical Corporation California (Continued on next page) JURISDICTION OF NAME FORMATION - ---- --------------- Oxy Petrochemicals Inc. Delaware OXY USA Inc. Delaware Oxy VCM Corporation Delaware Oxy Westwood Corporation California Oxychem (Canada), Inc. Canada Palo Duro Pipeline Company, Inc. Delaware PDG Chemical Inc. Delaware Placid Oil Company Delaware Repsol Occidental Corporation Delaware Vulcan Material Plastico S.A. Brazil