... quality with competitive price Zinc Sulphate Heptahydrate Molecular Formula: ZnSO4.7H2OMolecular Weight: 287.54Property: Colorless, orthorhombic system, prism crystal, its relative density is ... of 663.6g/100ml at 100°C) Quality Standard:Zinc Sulphate Heptahydrate Industrial Grade (HG/T2326-92)Feed Grade (HG/2934- ... rubber product, paint, medicine and other chemical products. Zinc sulphate hepta.Zn 21%