Synonyms: Chromate(1-)-51Cr,[(ethylenedinitrilo)tetraacetato]-, sodium (8CI); Chromate(1-)-51Cr,[[N,N'-1,2-ethanediylbis[N-(carboxymethyl)glycinato]](4-)-N,N',O,O',ON,ON']-,sodium, (OC-6-21)-; Chromate(1-)-51Cr, [[N,N'-1,2-ethanediylbis[N-[(carboxy-kO)methyl]glycinato-kN,kO]](4-)]-, sodium, (OC-6-21)- (9CI); 51Cr-EDTA