Sodium FerrocyanideMainly used as important raw material for pharmaceutical, pigment, tannage, metallurgy and chemical industries. 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. Used as oxidant, food additive, explosive and chemical reagent. Also used as additive for preventing agglomeration in melt snow in winter.