2-Methylpent-2-En-1-Oic Acid
Aroma Chemical Top Note CAS 3142-72-1
Strongly fruity and sour with a juicy strawberry, pineapple and raspberry character over a fatty, slightly cheesy edge. Used in traces, it lends ripe, natural fruitiness to berry and tropical accords.
Odor profile
| Note | Top Note |
| Descriptor 1 | Fruity |
| Descriptor 2 | Sweet |
| Descriptor 3 | Strawberry |
| Odor Impact1 | 990 |
| Tenacity1 | 1.7 h |
| Tenacity2 | 380 h |
1 Source: PerfumersWorld
2 Source: The Good Scents Company
Both tenacity figures are blotter life. The two labs use different evaluation protocols, so the numbers are not directly comparable — read them as two independent readings, not as a contradiction.
Identification
| CAS Number | 3142-72-1 |
| INCI Name | 2-methylpent-2-enoic acid |
| Category | Aroma Chemical |
| Formula | C6H10O2 |
| Mol. Weight | 114.14 |
| IUPAC Name | 2-methylpent-2-enoic acid |
| InChIKey | JJYWRQLLQAKNAD-UHFFFAOYSA-N |
Synonyms
2-methyl-2-pentenoic acid, Pentanoic acid, 2-methyl-, butyl ester, Butyl alpha-methylvalerate, Methylcamomille, 2 methyl 2 pentenoic acid (extra), 2-methyl 2-pentenoic acid, 2-methyl pent-2-enoic acid, 2-methyl-2-butyric acid, 2-methyl-2-pentenoic acid BRI, 2-methyl-2-pentenoic acid natural, 2-methyl-2-pentenoic acid synthetic, 2-methyl-2-pentenoic acid, natural, 2-methylpent-2-enoic acid, pent-2-enoic acid, 2-methyl-, 2-pentenoic acid, 2-methyl-, strawberiff (IFF), strawberriff (IFF), vertofraise (A.C.S. International)
Physical and chemical data
| Boiling Point | 123 °C @ 30 mmHg |
| Melting Point | 24.00 °C |
| Flash Point | 107.78 °C |
| Density | 0.976 |
| Refractive Index | 1.45 |
| Vapor Pressure | 0.055000 mmHg @ 25.00 C. (est) |
| LogP | 1.4 |
| Solubility | Slightly soluble in water; soluble in chloroform, carbon disulfide, ether |
| Appearance | Liquid |
All figures on this page are guide values collected from public reference works and supplier declarations. They differ between batches, origins and qualities. The data sheet of your own supplier is always the authoritative document for the material you actually use.