Ferrous oxalate, or iron(II) oxalate, is a chemical compound consisting of one iron(II) ion (Fe²⁺) and one oxalate ion (C₂O₄²⁻). It has the chemical formula

Chemical formula

A chemical formula or molecular formula is a way of expressing information about the atoms that constitute a particular chemical compound....

Fe[C₂O₄].

Iron(II) oxalate is more commonly encountered as the dihydrate, Fe[C₂O₄]·2H₂O, CAS # 6047-25-2. Its crystal structure consists of chains of oxalate-bridged iron atoms, capped by water molecules.