Global InformationHydrogenoxalate information
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| Names | |
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| IUPAC name
2-Hydroxy-2-oxoacetate[1]
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| Systematic IUPAC name
2-Hydroxy-2-oxoethanoate | |
Other names
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| Identifiers | |
CAS Number
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3D model (JSmol)
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Beilstein Reference
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3601755 |
| ChEBI |
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Gmelin Reference
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49515 |
PubChem CID
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CompTox Dashboard (EPA)
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InChI
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SMILES
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| Properties | |
Chemical formula
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HC2O−4 |
| Molar mass | 89.026 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Hydrogenoxalate or hydrogen oxalate (IUPAC name: 2-Hydroxy-2-oxoacetate) is an anion with chemical formula HC2O−4 or HO−C(=O)−CO−2, derived from oxalic acid by the loss of a single proton; or, alternatively, from the oxalate anion C2O2−4 by addition of a proton. The name is also used for any salt containing this anion. Especially in older literature, hydrogenoxalates may also be referred to as bioxalates, acid oxalates, or monobasic oxalates. Hydrogenoxalate is amphoteric, in that it can react both as an acid or a base.
Well characterized salts include sodium hydrogenoxalate (NaHC2O4),[2][3] potassium hydrogenoxalate (KHC2O4),[4] ammonium hydrogenoxalate ([NH4]+HC2O−4), rubidium hydrogenoxalate (RbHC2O4)[5] and dimethylammonium hydrogenoxalate ([(CH3)2NH]+HC2O−4).[6]
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