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); 166897-40-1 (hexahydrate);
3D model (JSmol)	Interactive image;
ChemSpider	147789;
ECHA InfoCard	100.019.047
EC Number	220-951-7;
PubChem CID	168963;
CompTox Dashboard (EPA)	DTXSID10905951 ;
	InChI InChI=1S/3C2H2O4.2Fe/c33-1(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
	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.^[1] It is used in certain toothpaste formulations; however, its effectiveness has been questioned.^[2]

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

References

^ Gillam, D. G.; Newman, H. N.; Davies, E. H.; Bulman, J. S.; Troullos, E. S.; Curro, F. A. "Clinical evaluation of ferric oxalate in relieving dentine hypersensitivity". Journal of Oral Rehabilitation. 31 (3): 245–250. doi:10.1046/j.0305-182X.2003.01230.x.
^ Cunha-Cruz, J.; Stout, J. R.; Heaton, L. J.; Wataha, J. C. (29 December 2010). "Dentin Hypersensitivity and Oxalates: a Systematic Review". Journal of Dental Research. 90 (3): 304–310. doi:10.1177/0022034510389179.

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[1] Gillam, D. G.; Newman, H. N.; Davies, E. H.; Bulman, J. S.; Troullos, E. S.; Curro, F. A. "Clinical evaluation of ferric oxalate in relieving dentine hypersensitivity". Journal of Oral Rehabilitation. 31 (3): 245–250. doi:10.1046/j.0305-182X.2003.01230.x.

[2] Cunha-Cruz, J.; Stout, J. R.; Heaton, L. J.; Wataha, J. C. (29 December 2010). "Dentin Hypersensitivity and Oxalates: a Systematic Review". Journal of Dental Research. 90 (3): 304–310. doi:10.1177/0022034510389179.

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[2]

See also

References