... 3)ISO9001:2008 Certificate Blue vitriol-Copper SulphateBrief Introduction to the Products:Copper sulphate is also called chalcanthite ... Varieties: Feed grade, Industrial grade, Agricultural grade.Characteristic:Pellet copper sulphate: Bright blue color, even pellet, fine mobility, ... dry and not agglomeration, for long-term storage.Powder copper sulphate:Even mixing, fine mobility, easy to assimilate. ...