... 4)Cu>25%, Pb<10ppm, As<5ppm Copper Sulfate 98% Chemical name: copper sulfate pentahydrate(Other names: Blue vitriol, Blue store)CAS ... industry (3) Chemical industry: Used in the manufacture of copper salt leaching, copper chloride, cuprous chloride and cuprous oxide, etc. (4) ... spices and dye intermediates of catalysts. (5) Water treatment industry. Copper Sulfate pentahydrate from chinese factory