Diethylenetriaminepentamethylenephosphonic acid heptasodium paʻakai, ʻike mau ʻia ʻo DETPMP•ʻO Na7, he mea hoʻohui i hoʻokumu ʻia i ka acid phosphonic acid.Loaʻa i ka huahana kahi ʻano kemika o C9H28N3O15P5Na7, he molar mass o 683.15 g/mol, a hōʻike i ka hana maikaʻi loa ma nā noi like ʻole.
ʻO kekahi o nā pono nui o DETPMP•ʻO Na7 kona mau waiwai chelating maikaʻi loa.Hiki iā ia ke hana i nā paʻa paʻa me nā ion metala, pale pono i ka hoʻokumu ʻana o ka unahi, a hoʻopau i nā hopena ʻino o nā ion metala i ka ʻōnaehana wai.Hoʻohui hou, ʻaʻole nui ka huahana i ka corrosion ma nā ʻili metala, e lilo ia i koho maikaʻi loa no ka mālama ʻana i ka wai boiler, nā ʻōnaehana wai hoʻomehana ʻenehana, a me nā noi ʻaila.