... .5%,33%, 35%min 2.SGS,BV inspection Product name: Zinc Sulphate ZnSO4Chemical formula: ZnSO4 • H2O/ ZnSO4 • 7H2OMolecular Weight: 179 ... or 50 lb paper bags.Specification: ITEMZnSO4 • H2OZnSO4 • 7H2OGranulesPurity, %≥989898%Zinc (Zn), %≥35.522.533.5% Water Insoluble , %≤0.050. ... ), %≤0.00050.00050.0005Cadmium (Cd)≤0.0020.0020.002Application: Zinc Sulphate is mainly used as raw material for the production ...