... ,insoluble in water And ethanol, soluble in acid, liquid ammonium chloride andpotassium cyanide.Usage: Mainly applies to electric plating ,magnetic material ... 18.10, insoluble in water, soluble in acid, ammonia, ammonium chloride, dissolved in sodium hydroxide to produce blue color solution, which ... on sieve (150um ) ≤ ,%0.10Residue on sieve (300um ) ,≤ %0.10 cupric Oxide