Name:Ferrous gluconate Synonyms:Iron gluconate; Glucoferron Molecular Formula :C12H22FeO14 Molecular Weight: 446.15 CAS Registry Number :299-29-6 (18829-42-0) Iron(II) gluconate, or ferrous gluconate, is a black compound often used as an iron supplement. It is the iron(II) salt of gluconic acid. It is marketed under brand names such as Fergon, Ferralet, and Simron. It is also present in the combination supplement dianazene, a vitamin mixture created by L. Ron Hubbard and used in the religion Scientology. Ferrous gluconate is used as a food additive when processing black olives. It imparts a uniform jet black colour to the olives. Uses: iron reinforcing agent, color stabilizer. Introduction: it is made of reductive iron and gluconic acid, including granular product and powdery product.