cobalt cation monoatomic dication cobalt(2+) +2 58.933 58.93320 CAS:22541-53-3 CHEBI:23337 CHEBI:48827 CHEBI:48828 COBALT (II) ION Co Co(2+) Co(II) Co2+ Cobalt(2+) Gmelin:6853 InChI=1S/Co/q+2 KEGG:C00175 PDBeChem:CO XLJKHNWPARRRJB-UHFFFAOYSA-N [Co++] chebi_ontology cobalt(2+) cobalt(2+) ion cobalt(2+) ion cobalt(II) cation cobalt(II) cation cobaltous ion divalent metal cation