An oxalate (also ethanedioate) is a salt or ester of oxalic acid. The oxalate ion is (COO)22- and is oxalic acid without the two hydrogen ions.
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.
Much of its other properties resemble oxalic acid.
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