Ercros SA engages in the manufacture and commercialization of chemical products. It operates through the following segments: Chlorine Derivatives, Intermediate Chemicals, and Pharmaceuticals. The Chlorine Derivatives segment manufactures chlorine which is used to purify and treat drinking and waste water; to treat and maintain swimming pool water; to bleach fabrics and paper; to produce solvents, detergents, and strippers; to manufacture printing inks and coloring; and to produce compound feed and in cooling equipment, among others. The Intermediate Chemicals segment focuses on the chemistry of formaldehyde. The Pharmaceuticals segment produces raw materials and active pharmaceutical ingredients. The company was founded in 1989 and is headquartered in Barcelona, Spain.