Record Information
Creation date2010-04-08 22:05:52 UTC
Update date2019-11-26 02:59:23 UTC
Primary IDFDB003577
Secondary Accession NumbersNot Available
Chemical Information
FooDB NameCalcium oxalate
DescriptionCalcium oxalate, also known as calcium oxalate monohydrate or calcium oxalic acid, belongs to dicarboxylic acids and derivatives class of compounds. Those are organic compounds containing exactly two carboxylic acid groups. Calcium oxalate is soluble (in water) and a moderately acidic compound (based on its pKa). Calcium oxalate can be found in a number of food items such as taro, ginkgo nuts, caraway, and sweet potato, which makes calcium oxalate a potential biomarker for the consumption of these food products. Calcium oxalate (in archaic terminology, oxalate of lime) is a calcium salt of oxalate with the chemical formula CaC2O4(H2O)x, where x can vary. All forms are colorless or white. The monohydrate occurs naturally as the mineral whewellite, forming envelope-shaped crystals, known in plants as raphides. The rarer dihydrate (mineral: weddellite) and trihydrate (mineral: caoxite) are also recognized. Calcium oxalates are as major constituent of human kidney stones, calcium oxalate is also found in beerstone, a scale that forms on containers used in breweries .
CAS Number563-72-4
Calcium oxalic acidGenerator
Dihydrate, calcium oxalateMeSH
Calcium oxalate monohydrate (1:1)MeSH
Calcium oxalate trihydrateMeSH
Monohydrate, calcium oxalateMeSH
Trihydrate, calcium oxalateMeSH
Calcium oxalate dihydrateMeSH
Oxalate, calciumMeSH
Calcium oxalate (1:1)MeSH
Calcium oxalate dihydrate (1:1)MeSH
Calcium oxalate monohydrateMeSH
Predicted Properties
Water Solubility16.2 g/LALOGPS
pKa (Strongest Acidic)1.36ChemAxon
Physiological Charge-2ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area80.26 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity36.11 m³·mol⁻¹ChemAxon
Polarizability5.46 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Chemical FormulaC2CaO4
IUPAC namecalcium oxalate
InChI IdentifierInChI=1S/C2H2O4.Ca/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2
Isomeric SMILES[Ca++].[O-]C(=O)C([O-])=O
Average Molecular Weight128.096
Monoisotopic Molecular Weight127.9422494
Description belongs to the class of organic compounds known as dicarboxylic acids and derivatives. These are organic compounds containing exactly two carboxylic acid groups.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
Sub ClassDicarboxylic acids and derivatives
Direct ParentDicarboxylic acids and derivatives
Alternative Parents
  • Dicarboxylic acid or derivatives
  • Carboxylic acid salt
  • Organic calcium salt
  • Carboxylic acid
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organic salt
  • Organooxygen compound
  • Carbonyl group
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
OntologyNo ontology term
Physico-Chemical Properties - Experimental
Physico-Chemical Properties - Experimental
Physical stateNot Available
Physical DescriptionNot Available
Mass CompositionNot Available
Melting PointNot Available
Boiling PointNot Available
Experimental Water SolubilityNot Available
Experimental logPNot Available
Experimental pKaNot Available
Isoelectric pointNot Available
ChargeNot Available
Optical RotationNot Available
Spectroscopic UV DataNot Available
DensityNot Available
Refractive IndexNot Available
Spectrum TypeDescriptionSplash KeyView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-004i-0900000000-0857d3cc87901a8874d9JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-004i-0900000000-0857d3cc87901a8874d9JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-004i-0900000000-0857d3cc87901a8874d9JSpectraViewer
ChemSpider IDNot Available
ChEMBL IDNot Available
KEGG Compound IDNot Available
Pubchem Compound IDNot Available
Pubchem Substance IDNot Available
ChEBI IDNot Available
Phenol-Explorer IDNot Available
DrugBank IDNot Available
HMDB IDNot Available
CRC / DFC (Dictionary of Food Compounds) IDNot Available
EAFUS IDNot Available
BIGG IDNot Available
KNApSAcK IDNot Available
HET IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
Flavornet IDNot Available
GoodScent IDNot Available
SuperScent IDNot Available
Wikipedia IDNot Available
Phenol-Explorer Metabolite IDNot Available
Duplicate IDSNot Available
Old DFC IDSNot Available
Associated Foods
FoodContent Range AverageReference
Biological Effects and Interactions
Health Effects / Bioactivities
laxative50503 An agent that produces a soft formed stool, and relaxes and loosens the bowels, typically used over a protracted period, to relieve constipation. Compare with cathartic, which is a substance that accelerates defecation. A substances can be both a laxative and a cathartic.DUKE
EnzymesNot Available
PathwaysNot Available
MetabolismNot Available
BiosynthesisNot Available
Organoleptic Properties
FlavoursNot Available
MSDSNot Available
Synthesis ReferenceNot Available
General ReferenceNot Available
Content Reference— Duke, James. 'Dr. Duke's Phytochemical and Ethnobotanical Databases. United States Department of Agriculture.' Agricultural Research Service, Accessed April 27 (2004).