2-Methyl-2-Pentenoic Acid

Product Name:

2-Methyl-2-pentenoic acid

Synonyms:

2-Methyl-2-pentenoic acid,99%;Strawberriff Acid;Natural 2-methyl-2-pentenoic acid;2-hexenoate;2-METHYL-2-PENTENOIC ACID;STRAWBERRIFF;RARECHEM AL BE 0127;2-methyl-2-pentenoicaci

CAS:

3142-72-1

MF:

C6H10O2

MW:

114.14

EINECS:

221-552-0

Product Categories:

Acids and Esters

Mol File:

3142-72-1.mol

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

Fp 

226 °F

pka

5.00±0.19(Predicted)

JECFA Number

1210

InChIKey

JJYWRQLLQAKNAD-SNAWJCMRSA-N

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)

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

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

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.

Raw materials

Propionaldehyde-->Silver nitrate