We are Fami-QS company,we can supply high purity,low heavy metal copper sulphate ,appearance: blue crystal. COPPER SULPHATE PENTAHYDRATE CRYSTAL Specification:ITEMSUNITSPECIFICATIONCu(%)min25Pb(ppm)max20As(ppm)max20Cd(ppm)max20Free Acid(%) max0.3Insoluble matter%max0.15Molecular FormulaCuSO4·5H2OCAS#7758-98-7HS Code28332500 PackingNet weight 25kgs woven bags with inner linerUsesCuSO4·5H2O is used ...