Ferric oxalate

Ferric oxalate

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Names
Systematic IUPAC name iron(3+) ethanedioate (2:3)
Other names Iron(III) oxalate
Identifiers
CAS Number	2944-66-3 (Anhydrous) 166897-40-1 (hexahydrate)
ChemSpider	147789
EC Number	220-951-7
Jmol 3D model	Interactive image
PubChem	168963
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
Solubility in water	slightly soluble
Vapor pressure	{{{value}}}
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, is a chemical compound composed of ferric ions and oxalate ligands; it may also be regarded as the ferric salt of oxalic acid. The anhydrous material is pale yellow; however, it may be hydrated to form Fe₂(C₂O₄)₃·6H₂O which is bright green in colour

Like many oxalates, ferric oxalate has been investigated as a short term treatment for dentin hypersensitivity. It is used in certain toothpaste formulations; however, its effectiveness has been questioned.

It is used as the light-sensitive element in the Kallitype photographic printing process.

See also

A number of other iron oxalates are known:-

• Iron(II) oxalate
• Potassium ferrioxalate
• Sodium ferrioxalate