dietary iron iron(2+) 2 55.845 55.93384 Fe InChI=1S/Fe/q+2 CHEBI:49599 [Fe+2] Fe(II) FE (II) ION iron(2+) ion Fe2+ Iron(2+) Fe(2+) iron(2+) iron(II) cation CHEBI:29033 CHEBI:13319 iron ion(2+) CHEBI:34754 Iron(2+) iron(2+) ion gmelin:6845 CHEBI:24876 pdb-ccd:FE2 chebi_ontology CHEBI:21129 Ferrous ion cas:15438-31-0 kegg.compound:C14818 iron(2+) CWYNVVGOOAEACU-UHFFFAOYSA-N iron(II) cation CHEBI:13321