Coumalic acid Chemical Properties

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

LogP

0.411 (est)

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

Hazard Codes 

Xi

Safety Statements 

22-24/25

WGK Germany 

3

TSCA 

Yes

HS Code 

29322090

MSDS

• Language:English Provider:2-Oxo-2H-pyran-5-carboxylic acid
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Coumalic acid Usage And Synthesis

Chemical Properties

pale yellow to pale brown powder

Uses

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.]

Coumalic acid(500-05-0)Related Product Information

• Folic acid
• Tetrahydro-4H-pyran-4-one
• Hyaluronic acid
• Centchroman
• Citric acid
• Ethyl 2-(Chlorosulfonyl)acetate
• Ethyl 4-hydroxy-3-methoxybenzoate
• Vanillylidenacetone
• 2-(2-OXO-2H-CHROMEN-3-YL)ACETIC ACID
• Ascoric Acid
• Coumalic acid methyl ester
• p-Coumaric acid
• 5-Carbethoxy-4,6-dimethyl-2-pyrone
• Methyl isodehydroacetate
• ISODEHYDROACETIC ACID
• 3-Hydroxycinnamic acid
• 4-Hydroxyphenylpyruvic acid
• 2-HYDROXYCINNAMIC ACID