Isoamyl Alcohol
Aroma Chemical Top Note CAS 123-51-3
A sharp alcoholic note with a fusel oil character and a fruity banana facet. Ethereal and natural, it adds a whiskey like lift to fruity accords.
Odor profile
| Note | Top Note |
| Descriptor 1 | Fruity |
| Descriptor 2 | Apple |
| Descriptor 3 | Pear |
| Tenacity2 | 8 h |
2 Source: The Good Scents Company
Identification
| CAS Number | 123-51-3 |
| INCI Name | Isoamyl alcohol |
| Category | Aroma Chemical |
| Formula | C5H12O |
| Mol. Weight | 88.15 |
| IUPAC Name | 3-methylbutan-1-ol |
| InChIKey | PHTQWCKDNZKARW-UHFFFAOYSA-N |
Synonyms
3-Methyl-1-butanol, Isopentyl alcohol, 3-Methylbutan-1-ol, Isopentanol, 3-Methylbutanol, 1-Butanol, 3-methyl-, Isoamylol, Isobutylcarbinol, 2-Methyl-4-butanol, Isobutyl carbinol, Iso-amylalkohol, Isoamylalcohol, iso amyl alcohol (natural), iso amyl alcohol technical grade, iso amyl alcohol FCC natural, iso amyl alcohol nat., iso amyl alcohol natural, iso amyl alcohol natural 98% F&F grade, iso amyl alcohol P & F, iso amyl alcohol synthetic, iso amyl alcohol, natural 99% pharmacutical grade, iso butyl carbinol, sec-butyl carbinol, sec-butylcarbinol, 3-methyl butan-1-ol, 3-methyl butanol, nat.iso amyl alcohol, nat.L-3-methylbutanol, iso pentanol, iso pentyl alcohol
Physical and chemical data
| Boiling Point | 132.2 °C |
| Melting Point | -117.00 °C |
| Flash Point | 45.6 °C |
| Density | 0.81 |
| Refractive Index | 1.4075 |
| Vapor Pressure | 28 mmHg (NIOSH, 2024) |
| LogP | 1.2 |
| Solubility | Water solubility = 2.67X10+4 mg/l @ 25 °C |
| Appearance | Isoamyl alcohol is a colorless liquid with a mild, choking alcohol odor. Less dense than water, soluble in water. Hence floats on water. Produces an irritating vapor. (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.