2-Methyl-2-pentenoic acid

2-Methyl-2-pentenoic acid Basic information
Product Name:2-Methyl-2-pentenoic acid
Synonyms:FEMA NUMBER 3195;2-Methyl-2-pentenoic acid,99%;2-METHYL-2-PENTENOIC ACID;RARECHEM AL BE 0127;2-methyl-2-pentenoicaci;2-methyl-pent-2-enoicacid;2-Pentene-2-carboxylicacid;3-Ethyl-2-methylacrylicacid
CAS:3142-72-1
MF:C6H10O2
MW:114.14
EINECS:221-552-0
Product Categories:Acids and Esters
Mol File:3142-72-1.mol
2-Methyl-2-pentenoic acid Structure
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)
FEMA 3195 | 2-METHYL-2-PENTENOIC ACID
refractive index n20/D 1.46(lit.)
Fp 226 °F
storage temp. Sealed in dry,Room Temperature
pka5.00±0.19(Predicted)
form powder to lump
color White to Almost white
Odorat 10.00 % in dipropylene glycol. dry acid sweaty strawberry woody fruity jam
Odor Typeacidic
FreezingPoint 20.0 to 25.0 ℃
JECFA Number1210
InChIKeyJJYWRQLLQAKNAD-SNAWJCMRSA-N
LogP1.89
CAS DataBase Reference3142-72-1(CAS DataBase Reference)
NIST Chemistry Reference2-Pentenoic acid, 2-methyl-(3142-72-1)
EPA Substance Registry System2-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 Information
ProviderLanguage
ACROSEnglish
SigmaAldrichEnglish
ALFAEnglish
2-Methyl-2-pentenoic acid Usage And Synthesis
DescriptionMay be prepared by distillation of 2-hydroxy-2-methylvaleric acid (m-form).
Chemical PropertiesWith 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.
Chemical Propertieswhite semi-transparent crystalline
Chemical Properties2-Methyl-2-pentenoic acid has a fruity odor.
OccurrenceReported found in strawberry
Uses2-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.
DefinitionChEBI: 2-Methyl-2-pentenoic acid is a methyl-branched fatty acid. It is a conjugate acid of a 2-methyl-(2E)-pentenoate(1-).
PreparationBy distillation of 2-hydroxy-2-methylvaleric acid (cis-form).
Taste threshold valuesTaste characteristics at 50 ppm: sour, acidic, sweaty, berry and fruit-like.
2-Methyl-2-pentenoic acid Preparation Products And Raw materials
Raw materialsPropionaldehyde–>Silver nitrate

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