Calcium Oxalate

Title: Calcium Oxalate
CAS Registry Number: 563-72-4
CAS Name: Ethanedioic acid calcium salt
Molecular Formula: C2CaO4
Molecular Weight: 128.10
Percent Composition: C 18.75%, Ca 31.29%, O 49.96%
Line Formula: CaC2O4
Literature References: Prepn from calcium formate: Bredt, US 1622991 (1927); from calcium cyanamide: Barsky, Buchanan, J. Am. Chem. Soc. 53, 1270 (1931).
Derivative Type: Monohydrate
Properties: Cubic crystals. Loses all of its water at 200°. When ignited is converted into CaCO3 or CaO without appreciable charring. d 2.2. Practically insol in water or acetic acid; sol in dil HCl or HNO3.
Density: d 2.2
Use: In ceramic glazes; as carrier for separation of rare earth metals; analysis for calcium: Ingols, Murray, Anal. Chem. 21, 525 (1949).
Calcium Oxide Calcium Palmitate Calcium Permanganate Calcium Peroxide Calcium Phenolsulfonate

Calcium oxalate
Calcium oxalate
CAS number 25454-23-3 YesY, (anhydrous)
5794-28-5 (monohydrate)
PubChem 16212978
ChemSpider 30549 YesY
ChEBI CHEBI:60579 YesY
Jmol-3D images Image 1
Molecular formula CaC2O4
Molar mass 128.097 g/mol, anhydrous
146.112 g/mol, monohydrate
Appearance white solid
Density 2.12 g/cm3, anhydrous
2.12 g/cm3, monohydrate
Melting point 200 °C, decomposes (monohydrate)
Solubility in water 6.7 mg/L (20 °C)
Related compounds
Other cations Beryllium oxalate
Magnesium oxalate
Strontium oxalate
Barium oxalate
Radium oxalate
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Calcium oxalate (in archaic terminology, oxalate of lime) is a chemical compound that forms envelope-shaped crystals, known in plants as raphides. A major constituent of human kidney stones, the chemical is also found in beerstone, a scale that forms on containers used in breweries. Its chemical formula is CaC2O4 or Ca (COO)2.