Profile: Xiamen Tongxin Trading Co., Ltd. is a supplier of chemicals & raw materials. Our product consists of PAC (Polymeric Aluminum Chloride), a new type of high performance inorganic macromolecule flocculating agent, PAM (Polyacrylamide), ferric chloride and an iron salt commonly used as a coagulant in water treatment. Polyacrylamide (PAM) is a high molecular polymer that is the most consumable and used in soluble high molecular polymers.