Stepan Co manufactures and sells a variety of chemicals and chemical-based products. The company organizes itself into three segments based on product type. The surfactants segment, which generates the majority of revenue, sells cleaning agents used in detergents, shampoos, body wash, fabric softeners, toothpastes, and other personal-care products. Surfactants are chemical agents that affect the interaction between two surfaces. The polymers segment sells polyurethane used to manufacture rigid foam for thermal insulation, as well as phthalic anhydride used to make plastic components for the construction, automotive, and boating industries. The specialty products segment sells chemicals used in food and flavoring. Most of Stepan's revenue comes from the United States.