Copper sulfate celeste or with yellow granular crystal, become acidic aqueous solution of inorganic microbicides, protective, safe for human. CuSO4 patent. General for five CuSO4 hydrate, 5 H2O, local name bravery "; Blue trapezius crystals; Density 2.284 g/cubic centimeters. Copper sulfate is preparation other copper compounds the important raw materials. Mixed with lime milk may have "bordeaux" solution, as a pesticide. Copper sulfate is a refined electrolysis of the electrolyte.