Synonyms: Phosphonicacid, [1,2-ethanediylbis[nitrilobis(methylene)]]tetrakis- (9CI);Phosphonicacid, [ethylenebis(nitrilodimethylene)]tetra- (6CI,7CI,8CI);EDPA;EDTMP;EDTPA;Editempa;Ethylenediamine-N,N,N',N'-tetra(methylphosphonic acid);Ethylenediaminetetramethylenephosphonate;N,N,N',N'-Tetrakis(phosphonomethyl)ethylenediamine;[Ethylenebis(nitrilodimethylene)]tetraphosphonic acid;