Product name:zinc sulphate heptahydrate CAS No.:7446-20-0 MF:ZnSO4.7H2O ... , join sulfuric acid reaction, the filter, add zinc powder to copper, cadmium, nickel and displacement out, filtering, filtrate heating, add ... 2005F),Execution standard :HG/T2326-2005 ITEMIndicatorsI( technical grade zinc sulphate monohydrate )II (industrial-strength heptahydrate )high-class first glassqualifid producthigh ...