Occidental Petroleum Corp. explores for, develops, produces and markets crude oil and natural gas. Occidental also manufactures and markets basic chemicals, including chlorine, caustic soda and ethylene dichloride (EDC), vinyls, including polyvinyl chloride (PVC) resins and vinyl chloride monomer (VCM), through its 76% interest in Oxy Vinyls, LP, and performance chemicals. Occidental conducts its operations through various oil and gas and chemical subsidiaries and affiliates. The Company also has an interest in petrochemicals through its 29.5% ownership in Equistar Chemicals, LP, which it intends to sell to Lyondell Chemical Company.