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, even ... 15 Remarks: 95% Upwards of powder for feed can pass 80-mesh experimentation screen. Pellet size of other type ...