ChemicalBook > CAS DataBase List > 2-Methyl-2-pentenoic acid

2-Methyl-2-pentenoic acid

Product Name
2-Methyl-2-pentenoic acid
CAS No.
3142-72-1
Chemical Name
2-Methyl-2-pentenoic acid
Synonyms
trans-2-Methyl-2-pentenoic acid;2-Pentenoic acid, 2-methyl-;STRAWBERRIFF;FEMA 3195;2-hexenoate;Strawberriff Acid;FEMA NUMBER 3195;RARECHEM AL BE 0127;2-methyl-2-pentenoicaci;Methylpentenoicacidpract
CBNumber
CB3403220
Molecular Formula
C6H10O2
Formula Weight
114.14
MOL File
3142-72-1.mol
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2-Methyl-2-pentenoic acid Property

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)
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Safety

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
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
W319519
Product name
2-Methyl-2-pentenoic acid
Purity
natural (US), 97.0%, FG
Packaging
sample-k
Price
$59.6
Updated
2023/01/07
TCI Chemical
Product number
M0784
Product name
2-Methyl-2-pentenoic Acid
Purity
>98.0%(GC)(T)
Packaging
5g
Price
$17
Updated
2025/07/31
TCI Chemical
Product number
M0784
Product name
2-Methyl-2-pentenoic Acid
Purity
>98.0%(GC)(T)
Packaging
25g
Price
$48
Updated
2025/07/31
Frontier Specialty Chemicals
Product number
JK495241
Product name
2-Methyl-2-pentenoic acid
Purity
98%
Packaging
5g
Price
$14
Updated
2021/12/16
Matrix Scientific
Product number
002201
Product name
2-Methyl-2-pentenoic acid
Purity
98%
Packaging
25g
Price
$22
Updated
2021/12/16
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2-Methyl-2-pentenoic acid Chemical Properties,Usage,Production

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.

Synthesis

99839-14-2

3142-72-1

General procedure for the synthesis of 2-methyl-2-pentenenitrile (CAS: 99839-14-2) as a raw material for the synthesis of 2-methyl-2-pentenoic acid: 220 g of 65% phosphoric acid was added to the reaction flask and the temperature of the reaction system was raised to 100 °C. The temperature of the reaction system was raised to 50 °C. The reaction flask was then charged to the reaction flask. 100 g of 2-methyl-2-pentenenitrile was slowly added dropwise over a period of 5 hours, and the temperature was lowered to 50 °C after completion of the dropwise addition. To the reaction mixture was added 150 g of water followed by extraction with 300 g of toluene in three portions (100 g each). The organic phases were combined and purified by distillation. The solvent was first recovered and then the fractions were collected at 82 °C/3 mmHg to give 110 g of 2-methyl-2-pentenoic acid in 98.5% purity and 92% yield.

References

[1] Patent: CN103539655, 2016, B. Location in patent: Paragraph 0036; 0037

2-Methyl-2-pentenoic acid Preparation Products And Raw materials

Raw materials

Silver nitrate Propionaldehyde

Preparation Products

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2-Methyl-2-pentenoic acid Suppliers

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View Lastest Price from 2-Methyl-2-pentenoic acid manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD
Product
2-Methyl-2-pentenoic acid 3142-72-1
Price
US $0.00-0.00/kg
Min. Order
25kg
Purity
98%min
Supply Ability
10000kg
Release date
2023-01-14
Hebei Chuanghai Biotechnology Co., Ltd
Product
2-Methyl-2-pentenoic acid 3142-72-1
Price
US $100.00/KG
Min. Order
1KG
Purity
99%min
Supply Ability
200TON
Release date
2024-10-31
Hebei Zhuanglai Chemical Trading Co Ltd
Product
2-Methyl-2-pentenoic acid 3142-72-1
Price
US $45.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
20 tons
Release date
2024-12-09

3142-72-1, 2-Methyl-2-pentenoic acidRelated Search:

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 Thiophanate-methyl Methyl 2-Methyl-2-pentenoic acid ethyl ester Methyl bromide

  • FEMA NUMBER 3195
  • FEMA 3195
  • 2-hexenoate
  • 2-Methyl-2-pentenoic acid,99%
  • Strawberriff Acid
  • Natural 2-methyl-2-pentenoic acid
  • 2-METHYL-2-PENTENOIC ACID
  • STRAWBERRIFF
  • RARECHEM AL BE 0127
  • 2-methyl-2-pentenoicaci
  • 2-methyl-pent-2-enoicacid
  • 2-Pentene-2-carboxylicacid
  • 3-Ethyl-2-methylacrylicacid
  • Methylpentenoicacidpract
  • 2-methylpent-2-en-1-oic acid
  • 2-Methyl-2-pentenoic acid, pract., 85%
  • 2-Pentenoic acid, 2-methyl-
  • trans-2-Methyl-2-pentenoic acid
  • 2-Methyl-2-pentenoic acid/Strawberriff acid
  • 2-Methyl-2-pentenoicAcid&gt
  • 2-Methyl-2-pentenoic acid USP/EP/BP
  • Methyl 2-methyl-2-pentenoic acid
  • 2-Methyl-2-pentenoic acid(Kosher)
  • 2-Methyl 2E-Pentenoic Acid
  • 2-methyl-2-pentenoic acid (strawberry acid)
  • 3142-72-1
  • Organic Building Blocks
  • Building Blocks
  • Carbonyl Compounds
  • Carboxylic Acids
  • C6
  • Acids and Esters