Synonyms: Phosphonic acid, P,P',P'',P'''-(1,6-hexanediylbis(nitrilobis(methylene)))tetrakis-, ammonium salt (1:6);Phosphonic acid, (hexamethylenebis(nitrilodimethylene))tetra-, hexaammonium salt;Hexaammonium dihydrogen (hexane-1,6-diylbis(nitrilobis(methylene)))tetrakisphosphonate;Phosphonic acid, (1,6-hexanediylbis(nitrilobis(methylene)))tetrakis-, hexaammonium salt;[hexane-1,6-diylbis(nitrilodimethanediyl)]tetrakis(phosphonic acid) hexaammoniate