Zinc Sulphate Heptahydrate specification: CERTIFICATE OF ANALYSIS BATCH NO.:JY100112 DATE: 06/01/2010 NAMEZinc Sulphate HeptahydrateCHEMICAL FORMULAZnSO4·7H2OPRODUCTION DATE06/01/2010ANALYSIS RESULTITEMRESULTAppearanceWhite Crystalline PowderWhite Crystalline PowderZn % Min2222.4Pb % Max0.0020.0018Cd % Max0.0020.0017Hg % Max0.010.009As % Max0.00050.0003PH Value(50g/L)Min3.53.7Comment :Qualified