1)Blue vitriol-CuSO4.5H2O. 2)Feed grade, Industrial grade, Agricultural grade 3)ISO9001:2008 Certificate Blue vitriol-Copper ... with the molecular formula of CuSO4.5H2O. Varieties: Feed grade, Industrial grade, Agricultural grade.Characteristic:Pellet copper sulphate: Bright blue color, ... or high-temperature environment, so it is suitable for a long-term storage and transportation by sea. Quality index ...