1,light blue color, dry, 2, free flowing, 3,good quality. Specifications:1) Purity: 98% min (CuSO4.5H2O)2) Cu: 25% min.3) Pb: 20ppm max.4) As: 20ppm max.5) Cd: 20ppm max.6) Free acid: 0.3% max.7) Insolubles: 0.2% max.Packing:25kg/1,000kg PP woven bag with PE innerUsage: could be used for mining, agricuture, technical purposes copper sulphate pentahydrate