... plating ,magnetic material, enamel coloring, ceramics pigment and copper salt. Application: widely used in glass,pigment,desulfurizer, ... in acid, ammonia, ammonium chloride, dissolved in sodium hydroxide to produce blue color solution, which leads to hydrogen ... carbon monoxide at high temperature can be reduced to metallic copper. ItemStandard IStandard IICuO , % ≥9998Muriatic acid insoluble substance ...