... :CuSO4-5 Specificationscopper sulphate: 1.copper sulphate,free smaples 2.copper sulphate,good price 3.copper sulphate factory 4.SGS/ISOcopper sulphate technical grade and fertilizer grade 1.Copper sulphate specification items ... heavy metal, best package, competitive priceMain markets: Asia, Europe, America.... Copper sulphate 96% 98% Industrial grade /Agricualture grade