Synonyms: [carbonylbis[nitrilobis(methylene)]]tetrakisphosphonic acid;Einecs 267-783-0;Phosphonic acid, (carbonylbis(nitrilobis(methylene)))tetrakis-;Phosphonic acid, p,p',p'',p'''-(carbonylbis(nitrilobis(methylene)))tetrakis-;Urea, tetra(methylene phosphonic acid);Urea, tetrakis(methylene phosphoric acid)