(((Phosphonomethyl)imino)bis(hexane-6,1-diylnitrilobis(methylene)))tetrakisphosphonic acid, sodium salt 35657-77-3 Dihexylenetriaminepentakismethylenephosphonic acid, sodium salt EINECS 252-656-4 Phosphonic acid, (((phosphonomethyl)imino)bis(6,1-hexanediylnitrilobis(methylene)))tetrakis-, sodium salt