Ferrous Sulphate Molecular formular: FeSO4.7H2O FeSO4.H2OQuality Index:FeSO4.7H2O FeSO4.H2O Assay(As FeSO4.7H2O) 99.5%--104.5%Assay(As FeSO4)86.0%--89.0%As≤ 0.0003%Heavy metals(As Pb)≤ 0.001%Assay(As Fe) 7H20 Assay(As Fe) 19.7%--20.9% 32.3%--33.6%Uses:In food processing industry, it is used as nutritional supplement.