Diethylenetriaminepentamethylenephosphonic acid heptasodium mchere, womwe umadziwika kuti DETPMP•Na7, ndi organic phosphonic acid-based based pawiri yothandiza kwambiri.Mankhwalawa ali ndi mankhwala a C9H28N3O15P5Na7, molar mass of 683.15 g/mol, ndipo amawonetsa ntchito zabwino kwambiri pamagwiritsidwe osiyanasiyana.
Chimodzi mwazabwino zazikulu za DETPMP•Na7 ndi yabwino kwambiri chelating katundu.Ikhoza kupanga maofesi okhazikika okhala ndi zitsulo zosiyanasiyana zazitsulo, kuteteza bwino mapangidwe a sikelo, ndi kuthetsa zotsatira zoipa za ayoni zitsulo m'madzi.Kuphatikiza apo, mankhwalawa amalepheretsa dzimbiri pamalo achitsulo, ndikupangitsa kuti ikhale chisankho chabwino kwambiri pochiza madzi opopera, makina oziziritsira madzi m'mafakitale, komanso kugwiritsa ntchito malo opangira mafuta.