Coumalic acid
Names | |
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Preferred IUPAC name 2-Oxo-2H-pyran-5-carboxylic acid | |
Other names Cumalic acid | |
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ECHA InfoCard | 100.007.182 |
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InChI
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Properties | |
Chemical formula | C6H4O4 |
Molar mass | 140.094 g·mol−1 |
Melting point | 210 °C (410 °F; 483 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references |
Chemical compound
Coumalic acid is an organic compound with the molecular formula C6H4O4. Its melting point is around 210 °C.
In laboratory coumalic acid may be obtained by self-condensation of malic acid in fuming sulfuric acid:[1]
Note that this scheme is incorrect. 4 H2O and 2 CO (carbon monoxide, not carbon dioxide) are liberated during the condensation.
References
- ^ Richard H. Wiley and Newton R. Smith (1963). "Coumalic acid". Organic Syntheses; Collected Volumes, vol. 4, p. 201.