... penta, cupric sulfate, blue stone, blue vitriol, copper sulphate pendahydratcopper sulphate pentahydrate is stable at ambient temperature and pressure, not ... 650 degree heat, can be decomposed into a black copper oxide, sulfur dioxide and oxygen. Purity: CuSO4.5H2O95% Min Cu ... of copper salt leaching,copper chloride,cuprous chloride and cuprous oxide,etc.(4) Dyestuff industry: used in the prodection ...