Synonyms: Phosphonic acid, P,P',P'',P'''-(((1,6-hexanediyl)bis(nitrilo)bis(methylene)))tetrakis-, ammonium sodium salt (1:6:1);Disodium hexaammonium (hexane-1,6-diylbis(nitrilobis(methylene)))tetrakisphosphonate;Phosphonic acid, (1,6-hexanediylbis(nitrilobis(methylene)))tetrakis-, hexaammonium disodium salt;ammonium sodium [hexane-1,6-diylbis(nitrilodimethanediyl)]tetrakis(phosphonate) (6:2:1)