Diethylenetriaminepentamethylenephosphonic acid heptasodium letsoai, eo hangata e tsejoang e le DETPMP•Na7, ke motsoako o sebetsang hantle haholo oa organic phosphonic acid-based.Sehlahisoa se na le foromo ea lik'hemik'hale ea C9H28N3O15P5Na7, boima ba molar ea 683.15 g/mol, 'me e bonts'a ts'ebetso e ntle haholo lits'ebetsong tse fapaneng.
E 'ngoe ea melemo ea mantlha ea DETPMP•Na7 ke thepa ea eona e ntle ea chelating.E ka etsa li-complexes tse tsitsitseng tse nang le li-ion tse sa tšoaneng tsa tšepe, ka katleho li thibela ho thehoa ha sekhahla, le ho felisa liphello tse mpe tsa li-ion tsa tšepe tsamaisong ea metsi.Ntle le moo, sehlahisoa se thibela kutu haholo holim'a tšepe, se e etsa khetho e ntle haholo bakeng sa kalafo ea metsi a boiler, lits'ebetso tsa metsi a pholileng a indasteri le lits'ebetso tsa lebala la oli.