Ferric oxalate

Ferric oxalate

Names
Systematic IUPAC name iron(3+) ethanedioate (2:3)
Other names Iron(III) oxalate
Identifiers
CAS Number	2944-66-3 (Anhydrous) Y 166897-40-1 (hexahydrate)
3D model (JSmol)	Interactive image
ChemSpider	147789
ECHA InfoCard	100.019.047
EC Number	220-951-7
PubChem CID	168963
UNII	DTJ9P8AB5L Y
CompTox Dashboard (EPA)	DTXSID10905951
InChI InChI=1S/3C2H2O4.2Fe/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;2*+3/p-6
SMILES [Fe+3].[Fe+3].O=C([O-])C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O
Properties
Chemical formula	C6Fe2O12
Molar mass	375.747 g/mol
Appearance	Pale yellow solid (anhydrous) Lime green solid (hexahydrate)
Odor	odorless
Melting point	365.1 °C (689.2 °F)
Solubility in water	slightly soluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ferric oxalate, also known as iron(III) oxalate, refers to inorganic compounds with the formula Fe₂(C₂O₄)₃(H₂O)_x but could also refer to salts of [Fe(C₂O₄)₃]^3-. Fe₂(C₂O₄)₃(H₂O)_x are coordination polymers with varying degrees of hydration. The coordination complex with the formula [Fe(C₂O₄)₃]^3- forms a variety of salts, a well-known example being potassium ferrioxalate. This article emphasizes the coordination polymers.