... white Powder 2,relative density: 1.957, Zinc Sulphate Monohydrate Spec as follows:Fertilizer grade(HG/T2326- ... %Zn ≥35.%As ≥0.0005% As ≥0.0005%Lead (Pb)≤0.002%Pb ≤0.001%Cadmium(cd) )≤ ... )≥95%the picture of Zinc Sulphate The Uses of Zinc Sulphate:1, Zinc Sulphate is mainly used as the ... protecting agents, medical emetic and fungicide.3, Zinc Sulphate is also applied to electric plating, mineral selection, ...