Dow, Olin, and DuPont are three of the world's largest chemical companies. Dow is a multinational chemical corporation based in the United States with operations in more than 180 countries. Olin Corporation is an American manufacturer and distributor of chemical products and ammunition. DuPont is an American chemical company that produces a wide range of products, including plastics, polymers, and industrial chemicals. All three companies have a long history of innovation and are major players in the global chemical industry.