Occidental Chemical Corporation (OxyChem) is a leading North American manufacturer of polyvinyl chloride (PVC) resins, chlorine and caustic soda – key building blocks for a variety of indispensable products such as plastics, pharmaceuticals, water treatment chemicals and paints and coatings. OxyChem’s market position is first or second in the United States for the principal products it manufactures and markets. OxyChem is the largest U.S. merchant marketer of caustic soda and the world's largest producer of caustic potash and calcium chloride.