... .: 1327-41-9 3.Appearance: dark yellow powder Polyaluminium Chloride for drinking waterPurity: 30% ItemRoller dried process Normal gradePAC-4AppearanceDark Yellow ... value(1% aqueous solution)3.5-5.0SO2- %, ≤3.0Ammoniacal nitrogen %, ≤0.01Fe, %, ≤2As, %, ≤0.0002Mn, %, ≤0.0075Cr 6+ %, ≤0.0005Hg ... water can be recycled use; New resource polyaluminium chloride PAC for water treatment