... Fe: ≤100ppm Pb: ≤60ppm Cl: max 100ppm HCl Insoluble matter: ≤0.01% Usage: Mainly used in ... t dissolve in water, but dissolves is in acid, ammonia water, ammonium chloride, then turns into ... prevent from wetting and separated from strong acid and foodstuff materials. When in fire, ... Cupric Oxide Item Standard I Standard II CuO , % ≥9998Muriatic acid insoluble substance ≤ ,%0.050.20Cl , % ≤0.020.20SO ...