2-Methyl-2-pentenoic acid Chemical Properties

Melting point:

26-28 °C(lit.)

Boiling point:

123-125 °C30 mm Hg(lit.)

Density 

0.979 g/mL at 25 °C

vapor density 

>1 (vs air)

refractive index 

n20/D 1.46(lit.)

FEMA 

3195 | 2-METHYL-2-PENTENOIC ACID

Flash point:

226 °F

storage temp. 

Sealed in dry,Room Temperature

pka

5.00±0.19(Predicted)

form 

powder to lump

color 

White to Almost white

Odor

at 10.00 % in dipropylene glycol. dry acid sweaty strawberry woody fruity jam

Odor Type

acidic

FreezingPoint 

20.0 to 25.0 ℃

JECFA Number

1210

InChIKey

JJYWRQLLQAKNAD-SNAWJCMRSA-N

LogP

1.89

CAS DataBase Reference

3142-72-1(CAS DataBase Reference)

NIST Chemistry Reference

2-Pentenoic acid, 2-methyl-(3142-72-1)

EPA Substance Registry System

2-Pentenoic acid, 2-methyl- (3142-72-1)

Safety Information

Hazard Codes 

C

Risk Statements 

34-22-41

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3261 8/PG 3

WGK Germany 

2

TSCA 

Yes

HazardClass 

8

PackingGroup 

III

HS Code 

29161900

MSDS

• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

2-Methyl-2-pentenoic acid Usage And Synthesis

Description

May be prepared by distillation of 2-hydroxy-2-methylvaleric acid (m-form).

Chemical Properties

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

Chemical Properties

white semi-transparent crystalline

Chemical Properties

With a dry acid note, 2-Methyl-2-pentenoic Acid is found in the odor of strawberries.The acid can be prepared from the corresponding saturated one by α-bromination followed by dehydrobromination.
It is used in fragrances to enhance fruity notes and in strawberry flavors.

Occurrence

Reported found in strawberry

Uses

2-Methyl-2-pentenoic Acid (CAS# 3142-72-1) can be used for cleansing and refreshing hair and scalp. It can also be used to store and cure food products, and for providing a long-lasting strawberry odor.

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-).

Preparation

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

Taste threshold values

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

2-Methyl-2-pentenoic acid(3142-72-1)Related Product Information

• Thiophanate-methyl
• Arachidonic acid
• Methylparaben
• Methyl acrylate
• Bensulfuron methyl
• Methyl acetate
• METHYLCYCLOPENTADIENE DIMER
• 2-Methyl-2-pentenal
• Mesityl oxide
• DBDCB
• Kresoxim-methyl
• Tiglic aldehyde
• 2,6-Lutidine
• 2,6-Dimethylphenol
• Methyl cyclopentenolone
• Methyl
• Methyl bromide
• 2-Methyl-2-pentenoic acid ethyl ester