Guozhong Chemical Co.,Ltd - Oxalic Acid，Lithopone，Titanium Dioxide，Zinc Oxide，Iron Oxide，Sodium Hexa metaphosphate(SHMP)，Glacial Acetic Acid，Formic Acid，Sodium tripolyphosphate，Carbon Black，Sodium Formate，Sodium hydroxide，Caustic Soda ,Soda Ash ,Sulphur Black，Stearic Acid，etc.