102962-06-1 1429-50-1 7651-99-2 EINECS 231-615-4 Ethylenediaminetetramethylenephosphonic acid, pentasodium salt Pentasodium trihydrogen (ethane-1,2-diylbis(nitrilobis(methylene)))tetrakisphosphonate Phosphonic acid, (1,2-ethanediylbis(nitrilobis(methylene)))tetrakis-, pentasodium salt