Oxalate

Oxalate
two capital Cs connected to each other by a solid line and each connected to two separate Os by a solid line and a dashed line next to the solid line, the whole thing in brackets with a −2 to the top-right
The structure of the oxalate anion
Names
IUPAC name
Oxalate
Systematic IUPAC name
Ethanedioate[1]
Identifiers
3D model (JSmol)
1905970
ChEBI
ChemSpider
2207
KEGG
UNII
  • InChI=1S/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6)/p-2
    Key: MUBZPKHOEPUJKR-UHFFFAOYSA-L
  • InChI=1S/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6)/p-2
    Key: MUBZPKHOEPUJKR-UHFFFAOYSA-L
  • C(=O)(C(=O)[O-])[O-]
Properties
C2O2−4
Molar mass 88.018 g·mol−1
Conjugate acid Hydrogenoxalate[2]
Structure
D2h
Related compounds
Dinitrogen tetroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Oxalate (systematic IUPAC name: ethanedioate) is an anion with the chemical formula C2O2−4. This dianion is colorless. It occurs naturally, including in some foods. It forms a variety of salts, for example sodium oxalate (Na2C2O4), and several esters such as dimethyl oxalate ((CH3)2C2O4). It is a conjugate base of oxalic acid. At neutral pH in aqueous solution, oxalic acid converts completely to oxalate.

  1. ^ "Oxalate".
  2. ^ "oxalate(2−) (CHEBI:30623)". www.ebi.ac.uk. Retrieved 2 January 2019. oxalate(2−) (CHEBI:30623) is conjugate base of oxalate(1−) (CHEBI:46904) … oxalate(1−) (CHEBI:46904) is conjugate acid of oxalate(2−) (CHEBI:30623)