((N,N'-Ethylenebis(N-(carboxymethyl)glycinato))(4-)-N,N',O,O',ON,ON')cobaltate(2-) 14931-83-0 15137-09-4 34523-71-2 43184-77-6 68811-46-1 Cobalt-ethylenediamine tetraacetic acid chelate Cobaltate(2-), ((N,N'-1,2-ethanediylbis(N-((carboxy-kappaO)methyl)glycinato-kappaN,kappaO))(4-))-, (OC-6-21)- EINECS 239-001-8