Synonyms: ((3,6,9,12-Tetrakis(phosphonomethyl)-3,6,9,12-tetraazatetradecane-1,14-diyl)bis(nitrilobis(methylene)))tetrakisphosphonic acid;[2-{2-[bis(phosphonomethyl)amino]ethyl}-16,16-dihydroxy-16-oxido-5,8,11,14-tetrakis(phosphonomethyl)-2,5,8,11,14-pentaaza-16-phosphahexadec-1-yl]phosphonic acid (non-preferred name)