Phosphonic acid, P,P′,P′′,P′′′-[[(phosphonomethyl)imino]bis[2,1-ethanediylnitrilobis(methylene)]]tetrakis-, sodium salt (1:7)
Heptasodium diethylenetriaminepentamethylenephosphonate
Heptasodium {2,5,8-tris[(hydroxyphosphinato)methyl]-10,10-dioxido-10-oxo-2,5,8-triaza-10lambda~5~-phosphadecan-1-yl}phosphonate (non-preferred name)