Oxalate
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An oxalate (also ethanedioate) is a salt or ester of oxalic acid. As a salt, the oxalate anion has the chemical formula C2O42− or (COO)22−.
Consumption of oxalates (for example, the grazing of animals on oxalate-containing plants such as greasewood) may result in kidney disease or even death due to oxalate poisoning.
The charge on oxalate allows it to act as a chelator of various positively charged metal ions.
Much of its other properties resemble oxalic acid.
- sodium oxalate - Na2C2O4
- calcium oxalate - CaC2O4, a major component of kidney stones
- dimethyl oxalate - (CH3)2C2O4
- phenyl oxalate ester - (C6H5)2C2O4
- Potassium ferrioxalate - [K3[Fe(C2O4)3], an iron complex with oxalate ligands
- ammonium oxalate - (NH4)2C2O4