Zymonic acid

Zymonic acid is an organic compound with the empirical formula C₆H₆O₅. It is the product of the condensation of two molecules of pyruvic acid:^[1]

2 CH₃C(O)CO₂H → (O=C)(HOC)(HC)OC(CH₃)(CO₂H) + H₂O

Quick facts Names, Identifiers ...

Zymonic acid

Names
IUPAC name 4-hydroxy-2-methyl-5-oxofuran-2-carboxylic acid
Other names 2,5-Dihydro-4-hydroxy-2-methyl-5-oxo-2-furancarboxylic acid 4-hydroxy-2-methyl-5-oxo-2,5-dihydrofuran-2-carboxylic acid
Identifiers
CAS Number	24891-71-2 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:172309
ChemSpider	35013332
PubChem CID	71436380
CompTox Dashboard (EPA)	DTXSID701187301
InChI InChI=1S/C6H6O5/c1-6(5(9)10)2-3(7)4(8)11-6/h2,7H,1H3,(H,9,10) Key: FMOWGHRAYUFXIG-UHFFFAOYSA-N
SMILES CC1(C=C(C(=O)O1)O)C(=O)O
Properties
Chemical formula	C6H6O5
Molar mass	158.109 g·mol−1
Appearance	white solid
Density	1.523 g/cm3
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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The molecule is an unsaturated furanone, as established by X-ray crystallography.^[2] In aqueous solution, zymonic acid reversibly converts to a variety of derivatives including ring-opened and cyclic hydrates. ^[3]