Cumalic acid

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Structural formula
Structural formula of cumalic acid
General
Surname Cumalic acid
other names
  • 2-pyrone-5-carboxylic acid,
  • 2-Oxo-2 H -pyran-5-carboxylic acid
Molecular formula C 6 H 4 O 4
Brief description

light brown solid

External identifiers / databases
CAS number 500-05-0
EC number 207-899-0
ECHA InfoCard 100.007.182
PubChem 68141
ChemSpider 61449
Wikidata Q19903002
properties
Molar mass 140.09 g mol −1
Physical state

firmly

Melting point

203–205 ° C (decomposition)

boiling point

218 ° C (160 hPa)

safety instructions
GHS labeling of hazardous substances
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cumalic acid is a chemical compound belonging to the pyrone group .

Extraction and presentation

Cumalic acid can be obtained by self-condensation of malic acid in fuming sulfuric acid.

Cumalic acid synthesis

properties

Cumalic acid is a light brown solid.

literature

  • Richard H. Wiley, Louis H. Knabeschuh: 2-Pyrones. XIII. The Chemistry of Coumalic Acid and its Derivatives. In: Journal of the American Chemical Society. 77, 1955, p. 1615, doi : 10.1021 / ja01611a062 .

Individual evidence

  1. ↑ a b c d e f g Data sheet Coumalic acid, 97% from Sigma-Aldrich , accessed on August 9, 2018 ( PDF ).
  2. ↑ unknown: COUMALIC ACID. In: Organic Syntheses. 31, 1951, p. 23, doi : 10.15227 / orgsyn.031.0023 .
  3. ↑ Malcolm Sainsbury: Heterocyclic Chemistry . Royal Society of Chemistry, 2001, ISBN 978-0-85404-652-2 , pp. 63 ( limited preview in Google Book search).