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HomeProduct name listCoumalic acid

Coumalic acid

Synonym(s):2-Oxo-2H-pyran-5-carboxylic acid;2-Pyrone-5-carboxylic acid

  • CAS NO.:500-05-0
  • Empirical Formula: C6H4O4
  • Molecular Weight: 140.09
  • MDL number: MFCD00006644
  • EINECS: 207-899-0
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-11-20 11:41:24
Coumalic acid Structural

What is Coumalic acid?

Chemical properties

pale yellow to pale brown powder

The Uses of Coumalic acid

Coumalic acid undergoes thermal reaction with 1,3-butadiene to yield dimethyl tricycle[3.2.1.02,7]oct-3-ene-2,4-dicarboxylate.

Definition

ChEBI: Coumalic acid is a pyranone.

General Description

Decarboxylates to α-pyrone, a Diels-Alder diene.

Purification Methods

The acid crystallises from MeOH. The methyl ester has m 73-74o (from pet ether) and b 178-180o/60 mm. [Beilstein 18/8 V 120.]

Properties of Coumalic acid

Melting point: 203-205 °C (dec.) (lit.)
Boiling point: 218 °C/120 mmHg (lit.)
Density  1.2154 (rough estimate)
refractive index  1.4434 (estimate)
Flash point: 218°C/120mm
storage temp.  Sealed in dry,Room Temperature
form  powder to crystal
pka 2.80±0.20(Predicted)
color  White to Light yellow to Light orange
Water Solubility  Very soluble in water.
Merck  14,2557
BRN  119747
CAS DataBase Reference 500-05-0(CAS DataBase Reference)
NIST Chemistry Reference 2H-Pyran-5-carboxylic acid, 2-oxo-(500-05-0)
EPA Substance Registry System 2H-Pyran-5-carboxylic acid, 2-oxo- (500-05-0)

Safety information for Coumalic acid

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
Precautionary Statement Codes P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P280:Wear protective gloves/protective clothing/eye protection/face protection.

Computed Descriptors for Coumalic acid

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