trans-2-Methyl-2-pentenoic acid Chemical Properties

Melting point:

26-28 °C (lit.)

Boiling point:

123-125 °C/30 mmHg (lit.)

Density 

0.979 g/mL at 25 °C

vapor density 

>1 (vs air)

vapor pressure 

1.63Pa at 24℃

FEMA 

3195 | 2-METHYL-2-PENTENOIC ACID

refractive index 

n20/D 1.46(lit.)

Flash point:

226 °F

storage temp. 

Sealed in dry,Room Temperature

solubility 

soluble in Chloroform, Methanol

form 

clear liquid

pka

5.00±0.19(Predicted)

color 

Colorless to Light orange to Yellow

Odor

at 10.00 % in dipropylene glycol. fruity strawberry woody

Odor Type

fruity

Water Solubility 

insoluble

InChIKey

JJYWRQLLQAKNAD-SNAWJCMRSA-N

LogP

1.9 at 25℃

CAS DataBase Reference

16957-70-3(CAS DataBase Reference)

NIST Chemistry Reference

2-Pentenoic acid, 2-methyl-, (E)-(16957-70-3)

EPA Substance Registry System

2-Pentenoic acid, 2-methyl-, (2E)- (16957-70-3)

Safety Information

Hazard Codes 

C

Risk Statements 

34

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3261 8/PG 3

WGK Germany 

2

TSCA 

Yes

HazardClass 

8

PackingGroup 

III

HS Code 

2916199590

MSDS

• Language:English Provider:(E)-2-Methylpent-2-en-1-oic acid
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

trans-2-Methyl-2-pentenoic acid Usage And Synthesis

Chemical Properties

clear colorless to pale yellow liquid

Chemical Properties

2-Methyl-2-pentenoic acid has a fruity odor.

Occurrence

Reported found in strawberry

Uses

trans-2-Methyl-2-pentenoic Acid is an unsaturated analog of the anticonvulsant Valproic Acid (V094750) and is used for aroma characterization of different beers with different hops.

Preparation

By distillation of 2-hydroxy-2-methylvaleric acid (cis-form).

Definition

ChEBI: 2-Methyl-2-pentenoic acid is a methyl-branched fatty acid. It is a conjugate acid of a 2-methyl-(2E)-pentenoate(1-).

Taste threshold values

Taste characteristics at 50 ppm: sour, acidic, sweaty, berry and fruit-like.

General Description

Adsorption and desorption of trans-2-methyl-2-pentenoic acid in dichloromethane has been investigated by using in situ attenuated total reflection infrared spectroscopy. Asymmetric hydrogenation of trans-2-methyl-2-pentenoic acid in hexane over two well defined E-40692 and E-5220 Engelhard Pd/Al₂O₃ catalysts modified with cinchonidine has been studied.

Flammability and Explosibility

Not classified

trans-2-Methyl-2-pentenoic acid(16957-70-3)Related Product Information

• 2-Methyl-2-pentenoic acid ethyl ester
• Methyl salicylate
• Ethyl 2-(Chlorosulfonyl)acetate
• Kresoxim-methyl
• Bensulfuron methyl
• Methyl cyclopentenolone
• METHYLCYCLOPENTADIENE DIMER
• Thiophanate-methyl
• Folic acid
• Methyl
• Ascoric Acid
• trans-2-Methyl-2-pentenoic acid
• Methyl bromide
• 1-Cyclopentenecarboxylic acid
• CITRININ
• Methyl 1-cyclohexene-1-carboxylate
• 3,4,5,6-Tetrahydrophthalic anhydride
• RUBRATOXIN B