2-Oxo-2H-pyran-5-carboxylic acid

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Names

[ CAS No. ]:
500-05-0

[ Name ]:
2-Oxo-2H-pyran-5-carboxylic acid

[Synonym ]:
2-Pyrone-5-carboxylic acid,2-Oxo-2H-pyran-5-carboxylic acid
2H-Pyran-5-carboxylic acid, 2-oxo-
6-oxopyran-3-carboxylic acid
α-Pyrone-5-carboxylic Acid
2-Oxo-2H-pyran-5-carboxylic acid
Cumalic Acid
Coumalic Acid
EINECS 207-899-0
MFCD00006644

Chemical & Physical Properties

[ Density]:
1.5±0.1 g/cm3

[ Boiling Point ]:
282.4±0.0 °C at 760 mmHg

[ Melting Point ]:
203-205 °C (dec.)(lit.)

[ Molecular Formula ]:
C6H4O4

[ Molecular Weight ]:
140.094

[ Flash Point ]:
137.3±19.4 °C

[ Exact Mass ]:
140.010956

[ PSA ]:
67.51000

[ LogP ]:
-0.43

[ Vapour Pressure ]:
0.0±1.2 mmHg at 25°C

[ Index of Refraction ]:
1.577

MSDS

Click to get detail MSDS

Safety Information

[ Hazard Codes ]:
Xi

[ Safety Phrases ]:
S22-S24/25

[ WGK Germany ]:
3

Synthetic Route

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Precursor & DownStream

Precursor

  • (±)-Malic Acid
  • L-(-)-Malic acid
  • Sulfuric acid
  • dimethyl 4-(methoxymethylidene)pent-2-enedioate
  • Hydrogen bromide
  • N-(1-ethoxycarbonyl-propen-2-yl)urea

DownStream

  • 4-Octylbenzoic acid
  • 4-(Phenoxymethyl)benzoic acid
  • alpha-pyrone
  • 6-oxo-tetrahydro-pyran-3-carboxylic acid
  • (2R)-2-Methylpentanedioic acid
  • 2H-PYRAN-2-ONE, 5-BROMO-
  • 3,5-Dibromo-2H-pyran-2-one
  • 2-OXO-2H-PYRAN-5-CARBONYL CHLORIDE
  • Crotonaldehyde

Related Compounds

  • 3-Bromo-2-oxo-2H-pyran-5-carboxylic acid
  • 6-methyl-2-oxo-2H-pyran-5-carboxylic acid
  • 4,6-DIMETHYL-2-OXO-2H-PYRAN-5-CARBOXYLIC ACID
  • 4,6-dimethyl-2-oxo-2H-pyran-5-carboxylic acid
  • 6-Methyl-2-oxo-2H-pyran-5-carboxylic acid methyl ester
  • 4,6-dimethyl-2-oxo-2H-pyran-5-carboxylic acid ethyl ester