... water And ethanol, soluble in acid, liquid ammonium chloride andpotassium cyanide.Usage: Mainly applies to electric plating ... ,magnetic material, enamel coloring, ceramics pigment and copper salt. Application: widely used in glass,pigment,desulfurizer ... carbon monoxide at high temperature can be reduced to metallic copper. ItemStandard IStandard IICuO , % ≥9998Muriatic acid insoluble substance ...