Diethylenetriamine pentamethylenephosphonic acid heptasodium gishiri, wanda aka fi sani da DETPMP•Na7, ingantaccen fili ne na tushen sinadarin phosphonic acid.Samfurin yana da dabarar sinadarai na C9H28N3O15P5Na7, madaidaicin molar 683.15 g/mol, kuma yana nuna kyakkyawan aiki a aikace-aikace daban-daban.
Ɗaya daga cikin manyan fa'idodin DETPMP•Na7 shine kyawawan kaddarorin sa.Yana iya samar da barga masu rikitarwa tare da ions ƙarfe daban-daban, yadda ya kamata ya hana samuwar sikelin, da kuma kawar da mummunan tasirin ions na ƙarfe a cikin tsarin ruwa.Bugu da ƙari, samfurin yana hana lalata a saman ƙarfe, yana mai da shi kyakkyawan zaɓi don kula da ruwan tukunyar jirgi, tsarin ruwan sanyaya masana'antu, da aikace-aikacen filin mai.