Zinc Sulphate is a crystalline solid. It occurs in the three stable hydrated form, which are ZnSO4.H2O (ZnSO4 Monohydrate) ZnSO4.6H2O (ZnSO4 hexahydrate) ZnSO4.7H2O (ZnSO4 heptahydrate). It is usually made by treating zinc, zinc sulphide, oxide, or carbonate with sulphuric acid. Zinc sulfate is widely used as preservative for leather, wood, and skin. It is widely preferred in water treatment for water purification process, flotation process of mineral separation, bleaching paper, and electro-deposition.