... crystalphysical characteristics: Blue crystal or powder, free flowing, and soluble in water, without impurities.Fineness: 20-80 mesh ... manufacture of copper salt leaching, copper chloride, cuprous chloride and cuprous oxide, etc. (4) Dyestuff industry: Used ... in organic synthesis, spices and dye intermediates of catalysts. (5) Water treatment industry. Copper Sulfate pentahydrate (2012 new product)