2-Methyl-2-pentenoic acid
- CAS NO.：3142-72-1
- Empirical Formula: C6H10O2
- Molecular Weight: 114.14
- MDL number: MFCD08277250
- EINECS: 221-552-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-07-08 07:26:47
What is 2-Methyl-2-pentenoic acid?
Description
May be prepared by distillation of 2-hydroxy-2-methylvaleric acid (m-form).
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.
Chemical properties
2-Methyl-2-pentenoic acid has a fruity odor.
Occurrence
Reported found in strawberry
The Uses of 2-Methyl-2-pentenoic acid
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.
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.
Properties of 2-Methyl-2-pentenoic acid
| 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 | n |
| 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 |
| FreezingPoint | 20.0 to 25.0 ℃ |
| JECFA Number | 1210 |
| 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 for 2-Methyl-2-pentenoic acid
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P330+P331:IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 2-Methyl-2-pentenoic acid
| InChIKey | JJYWRQLLQAKNAD-SNAWJCMRSA-N |
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