Ferric oxalate

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Ferric oxalate
Ferric oxalate.svg
CAS number 2944-66-3 (Anhydrous), 166897-40-1 (hexahydrate)
PubChem 168963
ChemSpider 147789
EC number 220-951-7
Jmol-3D images Image 1
Molecular 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 noted otherwise, 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]

See also[edit]

A number of other iron oxalates are known:-


  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.