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trans-2-Methyl-2-pentenoic acid

trans-2-Methyl-2-pentenoic acid Structure
trans-2-Methyl-2-pentenoic acid structure
CAS No.
16957-70-3
Chemical Name:
trans-2-Methyl-2-pentenoic acid
Synonyms
STRAWBERRIFF;(E)-2-Methylpent-2-enoic acid;FEMA 3195;FEMA NUMBER 3195;(e)-2-pentenoicaci;Methyl-2-pentenoic;RARECHEM AL BE 0127;METHYL-2-PENTENSAEURE, 2-;(E) 2-METHYL PENTENOIC ACID;(E)-2-Methylpent-2-en-1-sure
CBNumber:
CB5403219
Molecular Formula:
C6H10O2
Molecular Weight:
114.14
MDL Number:
MFCD00002655
MOL File:
16957-70-3.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-07-17 09:03:53
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trans-2-Methyl-2-pentenoic acid 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℃
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
solubility soluble in Chloroform, Methanol
pka 5.00±0.19(Predicted)
form clear liquid
color Colorless to Light orange to Yellow
Odor at 10.00 % in dipropylene glycol. fruity strawberry woody
Odor Type fruity
biological source synthetic
Water Solubility insoluble
Major Application flavors and fragrances
Cosmetics Ingredients Functions PERFUMING
InChI 1S/C6H10O2/c1-3-4-5(2)6(7)8/h4H,3H2,1-2H3,(H,7,8)/b5-4+
InChIKey JJYWRQLLQAKNAD-SNAWJCMRSA-N
SMILES CC\C=C(/C)C(O)=O
LogP 1.9 at 25℃
CAS DataBase Reference 16957-70-3(CAS DataBase Reference)
FDA UNII 44I99E898B
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)
UNSPSC Code 12352100
NACRES NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)  Corrosion (GHS05)
GHS05
Signal word  Danger
Hazard statements  H314
Precautionary statements  P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363
PPE Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
Hazard Codes  C
Risk Statements  34
Safety Statements  26-36/37/39-45
RIDADR  UN 3261 8/PG 3
WGK Germany  2
TSCA  TSCA listed
HazardClass  8
PackingGroup  III
HS Code  2916199590
Storage Class 8A - Combustible corrosive hazardous materials
Hazard Classifications Skin Corr. 1B
REACH Registrations Active
Limited Quantities 5.0 L (1.3 gallons) (liquid) or 5.0 kg (11 lbs) (solid)
Excepted Quantities Max Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)
NFPA 704
0
3 0

trans-2-Methyl-2-pentenoic acid price More Price(42)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich W319503 trans-2-Methyl-2-pentenoic acid ≥98%, FCC, FG 16957-70-3 1 each $71 2026-04-30 Buy
Sigma-Aldrich 264776 trans-2-Methyl-2-pentenoic acid 97% 16957-70-3 25g $44.7 2026-04-30 Buy
Sigma-Aldrich W319503 trans-2-Methyl-2-pentenoic acid ≥98%, FCC, FG 16957-70-3 1 unit $69 2025-07-31 Buy
Sigma-Aldrich W319503 trans-2-Methyl-2-pentenoic acid ≥98%, FCC, FG 16957-70-3 sample $67 2024-03-01 Buy
TCI Chemical M2814 trans-2-Methyl-2-pentenoic Acid >97.0%(GC)(T) 16957-70-3 5g $26 2026-04-30 Buy
Product number Packaging Price Buy
W319503 1 each $71 Buy
264776 25g $44.7 Buy
W319503 1 unit $69 Buy
W319503 sample $67 Buy
M2814 5g $26 Buy

trans-2-Methyl-2-pentenoic acid Chemical Properties,Uses,Production

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 synthesis

623-36-9
16957-70-3
123-15-9
1187-82-2
Synthesis of trans-2-Methyl-2-pentenoic acid from 2-Methyl-2-pentenal

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

Raw materials

Pentanoic acid, 3-(acetyloxy)-2-methylene-, methyl ester ethyl (E)-2-methylpent-2-en-1-oate Methyl trans-2-methyl-2-pentenoate 2-Methyl-2-pentenal (S)-2-Methylvaleric acid
Methyl valeraldehyde

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Preparation Products

trans-2-Methyl-2-pentenoic acid Suppliers

Global( 229)Suppliers
Supplier Tel Email Country ProdList Advantage
Shanghai Changyan Chem & Tech Co., Ltd. 021-20242659 18930833303 sales@changyanchem.cn China 4998 55
SICHUAN JILONGXINGRUI PHARMA CO,.LTD 0830-8999890 13883082125 511598975@qq.com China 13 58
Alfa Aesar 400-6106006 saleschina@alfa-asia.com China 30103 84
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Adamas Reagent, Ltd. 400-6009262 15618770481 yhx@titansci.com China 14098 59
Nanjing Chemlin Chemical Co., Ltd 025-83697070 13770331960 info@chemlin.com.cn China 16305 64
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202 13764082696 info@hanhongsci.com China 42917 64
Beijing Isomersyn Technology CO;LTD 010-82954736 13391601435 sales@isomersyn.com China 3294 57
Shandong Xiya Chemical Co., Ltd 13355009207 13355009207 3007715519@qq.com China 18722 57
Syntechem Co.,Ltd info@syntechem.com China 12973 57
Supplier Advantage
Shanghai Changyan Chem & Tech Co., Ltd. 55
SICHUAN JILONGXINGRUI PHARMA CO,.LTD 58
Alfa Aesar 84
Energy Chemical 61
Adamas Reagent, Ltd. 59
Nanjing Chemlin Chemical Co., Ltd 64
Shanghai Hanhong Scientific Co.,Ltd. 64
Beijing Isomersyn Technology CO;LTD 57
Shandong Xiya Chemical Co., Ltd 57
Syntechem Co.,Ltd 57

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

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
(E)-2-Methyl-2-pentenoic acid pictures 2026-07-17 (E)-2-Methyl-2-pentenoic acid
16957-70-3
 $29.00 97.80% 10g TargetMol Chemicals Inc.
trans-2-Methyl-2-pentenoic acid pictures 2026-06-30 trans-2-Methyl-2-pentenoic acid
16957-70-3
 1kg 98% 1000kgs Shaanxi Dideu New Materials Co. Ltd
trans-2-Methyl-2-pentenoic acid pictures 2026-03-20 trans-2-Methyl-2-pentenoic acid
16957-70-3
 $100.00 1KG 99%min 200TON Hebei Chuanghai Biotechnology Co., Ltd

trans-2-Methyl-2-pentenoic acid Spectrum

trans-2-Methyl-2-pentenoic acid(16957-70-3)MStrans-2-Methyl-2-pentenoic acid(16957-70-3)1HNMRtrans-2-Methyl-2-pentenoic acid(16957-70-3)13CNMRtrans-2-Methyl-2-pentenoic acid(16957-70-3)IR1trans-2-Methyl-2-pentenoic acid(16957-70-3)Raman

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FEMA NUMBER 3195 FEMA 3195 (e)-2-methylpent-2-en-1-oic acid RARECHEM AL BE 0127 STRAWBERRIFF TRANS-2-METHYL-2-PENTENOIC ACID 98+% F 2-Pentenoic acid, 2-methyl-, (2E)- (E)-2-Methylpent-2-en-1-sure METHYL-2-PENTENSAEURE, 2- (2E)-2-Methyl-2-pentenoic acid (e)-2-pentenoicaci trans-2-Methyl-2-pentenoic acid (E)-2-Methyl-2-pentenoic acid (E)-2-Methyl-2-pentenoyl chloride trans-2-Methyl-2-pentenoic acid,97% 2-Methyl-2-pentenoic acid,trans-2-Methyl-2-pentenoic acid 2-METHYL-2-PENTENOIC ACID, NATURAL Methyl-2-pentenoic (E) 2-METHYL PENTENOIC ACID rans-2-Methyl-2-pentenoicaci trans-2-Methyl-2-pentenoic acid USP/EP/BP TIANFU-CHEM - trans-2-Methyl-2-pentenoic acid (E)-2-Methyl-2-pentenoic acid, 10 mM in DMSO trans-2-Methyl-2-pentenoic acid (E)-2-Methylpent-2-enoic acid 16957-70-3 C2H5CHCCH3CO2H Carbonyl Compounds Carboxylic Acids Building Blocks Organic Building Blocks C6 Carbonyl Compounds Carboxylic Acids C6