Synonyms: Cobaltate(3-), (N,N-bis((phosphono-kappaO)methyl)glycinato(5-)-kappaN,kappaO)-, sodium (1:3), (T-4)-;Trisodium cobaltous N-carboxymethylnitrilodi(methylenephosphonate);Cobaltate(3-), (N,N-bis((phosphono-kappaO)methyl)glycinato(5-)-kappaN,kappaO)-, trisodium, (T-4)-;Trisodium (N,N-bis(phosphonomethyl)glycinato(5-))cobaltate(3-)