Synonyms: Cobaltate(3-), (N,N-bis((phosphono-kappaO)methyl)glycinato(5-)-kappaN,kappaO)-, potassium (1:3), (T-4)-;Tripotassium cobaltous N-carboxymethylnitrilodi(methylenephosphonate);Cobaltate(3-), (N,N-bis((phosphono-kappaO)methyl)glycinato(5-)-kappaN,kappaO)-, tripotassium, (T-4)-;Tripotassium (N,N-bis(phosphonomethyl)glycinato(5-))cobaltate(3-);cobalt(2+) potassium [bis(phosphonatomethyl)amino]acetate (1:3:1)