... 25%; 2)Package,25kg/bag; 3)Use,Feed additives. Blue crystal powder Feed additives 98.5% Copper Sulphate Molecular Formula: CuSO4 ... ·5H2OMolecular Weight: 249.68 Properties: Blue transparent crystal, relative density: 2·29. Easily soluble in water, aqueous solution ... standard: HG/T2932-1999; ohter grade standard: GB437-2009 Blue crystal powder Feed additives 98.5% Copper Sulphate