Sodium ferrocyanide is the sodium salt of the coordination compound of formula [Fe(CN)6]4−. In its hydrous form, Na4Fe(CN)6.10H2O, it is sometimes known as yellow prussiate of soda.
S 6990 (OTTO) Sodium ferrocyanide, decahydrate, ≥99% Cas 14434-22-1 - used in producing iron blue and potassium ferricyanide, surface corrosion protecting for tannage and metal, carburization treating for carbon steel, removing iron in pharmaceutical producing.