Product Name : Zinc Sulphate Monohydrate (EP/ LR) Chemical Name : Zinc Salt Monohydrate CAS No. : 7446-19-7 Color & Physical Form ; White Crystalline Powder Active Ingredient ; ZnSO4.H2O Assay ; 99 - 100.5% Molecular Wt. ; 179.45 pH (1 % of Solution) : 4 - 5.2 Zn-Content : Min. 32% Chloride : NMT 0.002% Iron ; NMT 0.003% Arsenic ; NMT 0.0005% Heavy Metals (as Pb) ; NMT 0.002% Alkaline & Earth Alkaline (SO4) : NMT 0.7% Loss On Drying at 105 degree C : NMT 1%