Diethylenetriaminepentamethylenephosphonic acid heptasodium nnu, nke a na-akpọkarị DETPMP•Na7, bụ ihe mejupụtara phosphonic acid organic na-arụ ọrụ nke ọma.Ngwaahịa ahụ nwere usoro kemịkalụ nke C9H28N3O15P5Na7, oke molar nke 683.15 g/mol, ma gosipụta ọmarịcha arụmọrụ na ngwa dị iche iche.
Otu n'ime isi uru nke DETPMP•Na7 bụ ezigbo aghụghọ ya.Ọ nwere ike ịmepụta ogige kwụsiri ike nke nwere ion ígwè dị iche iche, na-egbochi nguzobe nke ọnụ ọgụgụ nke ọma, ma wepụ mmetụta ọjọọ nke ion metal na usoro mmiri.Na mgbakwunye, ngwaahịa a na-egbochi corrosion n'elu igwe, na-eme ka ọ bụrụ ezigbo nhọrọ maka ọgwụgwọ mmiri esi mmiri ọkụ, sistemu mmiri jụrụ oyi na ngwa mmanụ.