Changjiang Chemical Co., Ltd is a chemical enterprise located in Shangdong province.We are specialised in research&development and making water treatment chemical/water treatment agents for 20+ years.If you are in need of the following products, pls contact us.1. ATMP Amino Trimethylene Phosphonic Acid with CAS No. 6419-19-8 2. ATMPNa5 Penta sodium salt of Amino Trimethylene Phosphonic Acid with CAS No. 2235-43-0 (5-Na) 3. HEDP 1-Hydroxy Ethylidene-1, 1-Diphosphonic Acid with CAS No. 2809-21-44. HEDPNa Monosodium of 1-Hydroxy Ethylidene-1, 1-Diphosphonic Acid with CAS No. 29329-71-35. HPMA Hydrolyzed Polymaleic Anhydride with CAS No. 26099-09-26. PAA Polyacrylic Acid with CAS No. 9003-01-47. PBTCA 2-Phosphonobutane -1, 2, 4-Tricarboxylic Acid with CAS No. 37971-36-18. Dichlord Isocyanuric Acid (Euchlorine)9. Dodecyl dimethyl benzyl ammonium chloride (1227) with CAS No. 8001-54-510. 14 alkyl dimethyl benzyl ammonium chloride (1427) with CAS No. 139-08-211. *****If you are in need of any chemicals of water treatments, pls contact us.