Zinc Sulphate Monohydrate in Crystalline Powder Form contains moisture in a maximum range of 0.5 %. Zinc Sulphate Monohydrate is available in white free flowing crystalline powder form. Zinc Sulphate Monohydrate is used in feed additives and fertilizers. Zinc Sulphate Monohydrate in Crystalline Powder Form comprises of minimum 33-35% zinc and maximum 0.001%.