[[(2-hydroxyethyl)imino]bis(methylene)]bisphosphonic acid Phosphonic acid, (2-hydroxyethyl)iminobis(methylene)bis- ethanolaminedi(methylenephosphonic acid) 2-[Bis(phosphonomethyl)amino]ethanol 2-Hydroxyethylbis(phosphonomethyl)amine 2-Hydroxyethyliminobis(methylene phosphonic acid) 2-Hydroxyethyliminodimethanephosphonic acid Einecs 227-833-4