Ferro Chem Industries manufactures Fumaric Acid or Trans-Butenedioic Acid. Ferro Chem Industries is an ISO 14000 certified company that supplies Pharmaceutical Bulk Drugs and Intermediates. The Fumaric Acid or Trans-Butenedioic Acid is a white crystalline fine powder. This acid is widely used in medicine, food, and used in manufacture of polyester resins and polyhydric alcohols and as a mordant for dyes.