Diethylenetriaminepentamethylenephosphonic acid heptasodium ntsev, feem ntau hu ua DETPMP•Na7, yog ib qho zoo heev organic phosphonic acid-based compound.Cov khoom lag luam muaj cov tshuaj formula C9H28N3O15P5Na7, molar loj ntawm 683.15 g / mol, thiab nthuav tawm kev ua tau zoo hauv ntau yam kev siv.
Ib qho txiaj ntsig tseem ceeb ntawm DETPMP•Na7 yog nws cov khoom chelate zoo heev.Nws tuaj yeem tsim kev ruaj khov nrog ntau yam hlau ions, tiv thaiv kev tsim cov nplai, thiab tshem tawm cov teebmeem ntawm cov hlau ions hauv cov dej.Tsis tas li ntawd, cov khoom lag luam cuam tshuam qhov corrosion ntawm cov hlau qhov chaw, ua rau nws yog ib qho kev xaiv zoo tshaj plaws rau kev kho dej boiler, dej txias tshuab, thiab kev siv roj av.