... : black or brownish black powder,insoluble in water And ethanol, soluble in acid, liquid ammonium chloride andpotassium cyanide. ... copper salt. Application: widely used in glass,pigment,desulfurizer,catalyst,etcPacking: net 25kg in plastic woven bag,or according ... constant 18.10, insoluble in water, soluble in acid, ammonia, ammonium chloride, dissolved in sodium hydroxide to produce blue ...