... Powder 2,relative density: 1.957, Zinc Sulphate Monohydrate Spec as follows:Fertilizer grade(HG/T2326- ... 2934-2000)Assay(ZnSO4.7H2O )≥93.0%Assay(ZnSO4.H2O)≥98%Zn ≥33%Zn ≥35.%As ≥0.0005 ... )≥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, ...