Ercros, S.A. manufactures and sells basic chemicals, intermediate chemicals, and pharmaceuticals in Spain. It operates through three segments: Chlorine Derivatives, Intermediate Chemicals, and Pharmacy. The Chlorine Derivatives segment produces ammonia, caustic potash, caustic soda, chlorine chloroisocyanurates, dichloroethane, ercrosbio, hydrochloric acid, hydrogen peroxide, polyvinyl chloride, potassium carbonate, PVC compounds, sodium chlorate, sodium chlorite, sodium hypochlorite, sulfuric acid, and vinyl chloride. The Intermediate Chemicals segment provides formaldehyde, glues and resins, molding compunds, paraformaldehyde, pentaerythritol and dipentaerythritol, and sodium formate for manufacturing of particle, as well as resins, paints, and varnishes in the furniture and decoration industry; sockets and switches in the electrical components sector; and health and packaging items in the textile tanning industry. The Pharmacy division engages in the production of raw materials and pharmaceutical intermediate products from antibiotic, anti-hypertensives, and anti-ulcer drugs. This segment's products include amlodipine besylate, azithromycin, clarithromycin, erythromycins, famotidine, fosfomycin calcium and sodium, fosfomycin trometamol, and fusidic acid. The company is also involved in exporting activities. Ercros, S.A. was founded in 1817 and is headquartered in Barcelona, Spain.