Isoamyl Acetate
Aroma Chemical Top Note CAS 123-92-2
A sweet fruity banana note with a pear drop character and a solvent like lift. Powerful and diffusive, it is a classic fruity top note modifier.
Odor profile
| Note | Top Note |
| Descriptor 1 | Fruity |
| Descriptor 2 | Vanilla |
| Descriptor 3 | Pear |
| Odor Impact1 | 800 |
| Tenacity1 | 0.1 h |
| Tenacity2 | 4 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 | 123-92-2 |
| INCI Name | Isoamyl acetate |
| Category | Aroma Chemical |
| Formula | C7H14O2 |
| Mol. Weight | 130.18 |
| IUPAC Name | 3-methylbutyl acetate |
| InChIKey | MLFHJEHSLIIPHL-UHFFFAOYSA-N |
Synonyms
Iso Amyl Acetate (nom meaw), Methyl Butyl Acetate, Beta, Amyl Acetate, common, Beta-methyl Butyl Acetate, Isoamyl ethanoate, acetic acid 3-methyl butyl ester, acetic acid 3-methylbutyl ester, acetic acid isoamyl ester, acetic acid isopentyl ester, acetic acid, 3-methylbutyl ester, acetic acid, isopentyl ester, iso-amyl acetate, nat.iso amyl acetate, iso amyl acetate (natural), iso amyl acetate 35% double peak, iso amyl acetate 65% double peak, iso amyl acetate 98% (single isomer), iso amyl acetate FCC, iso amyl acetate FCC (natural), iso amyl acetate natural, iso amyl acetate naturel, iso amyl acetate pure, iso amyl acetate single peak, iso amyl acetate, natural, iso amyl ethanoate, iso-amyl-acetate, butanol, 3-methyl-, 1-butanol, 3-methyl-, 3-methyl butyl acetate, 2-methyl butyl ethanoate, 3-methyl butyl ethanoate, 3-methyl-1-butanol acetate, 3-methyl-1-butanol, 3-methyl-1-butyl acetate, 3-methyl-but-1-yl acetate, 3-methylbutyl acetate, 3-methylbutyl ester of acetic acid, 3-methylbutyl ethanoate, (3-methylbutyl) ethanoate, acetate, acetate, acetate
Physical and chemical data
| Boiling Point | 142.2 °C |
| Melting Point | -78.5 °C |
| Flash Point | 25.0 °C |
| Density | 0.876 |
| Refractive Index | 1.4 |
| Vapor Pressure | 4 mmHg at 68 °F ; 5 mmHg at 74.7 °F; 760 mmHg at 288 °F (NTP, 1992) |
| LogP | 2 |
| Solubility | In water, 2000 mg/L at 25 °C |
| Appearance | Iso-amyl acetate is an oily liquid; colorless; banana odor. Floats and mixes with water. Flammable, irritating vapor is produced. (USCG, 1999) |
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.