We are positive international agents of searchingBeneut has been making copper sulphate for already 17 years in Taiwan.Research and develop the group through the constant improvement for many yearsWould begin to supply the copper sulphate of the high grade in July of 2011Now, Beneut of copper sulphate pentahydrate is high-level, Cu:25.2% min, Pb:10ppm max, As:10ppm max, Hg:10ppm max, Ni:10ppm max, Cd:10ppm max, free flowing, no caking and no dust in air, mesh pass through 30 mesh.Interested please get in touch with usWe are very sincere to seek the international agent agai