Zinc sulphate heptahydrate (ZnSO4.7h2o) is mainly used as raw material for the production of lithophone and zincsalts. It is also used in synthetic fiber industry, zinc plating , pesticides, flotation, fungicide and water purification. In agriculture, it is mainly used in feed additive and trace element fertilize,etc MOQ: 25 tons Packing: 25kg/ bag or as requirement's customers 1. Zinc Sulfate heptahydrate: Purity: 99% Zn: 21.5% 2. Zinc Sulfate monohydrate: Purity:99.5% Zn: 36%