... .: 1327-41-9 3.Appearance: dark yellow powder Polyaluminium Chloride for drinking waterPurity: 30% ItemRoller dried process Normal gradePAC-4AppearanceDark Yellow ... of uses. 1, purified drinking water, sewage; 2, industrial water purification, industrial wastewater, mining, oil field injection water, making water purification, metallurgy, coal washing, leather ...