Acetoin
Aroma Chemical Top Note CAS 513-86-0
A sweet buttery note with creamy dairy and milky facets. It is widely used to build and round butter, cream and other dairy effects.
Odor profile
| Note | Top Note |
| Descriptor 1 | Food-like |
| Descriptor 2 | Buttery |
| Descriptor 3 | Milky |
| Odor Impact1 | 190 |
| Tenacity1 | 0.48 h |
| Tenacity2 | 28 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 | 513-86-0 |
| INCI Name | Acetoin |
| Category | Aroma Chemical |
| Formula | C4H8O2 |
| Mol. Weight | 88.11 |
| IUPAC Name | 3-hydroxybutan-2-one |
| InChIKey | ROWKJAVDOGWPAT-UHFFFAOYSA-N |
Synonyms
2,3-butanolone, Hydroxy-beta-oxobutane, Gamma, Acetyl Methyl Carbinol, Dimethyl Ketol, Butanolone, 2-Butanone, 3-hydroxy, 3-Hydroxy-2-butanone, acethoin, 2-acetoin, acetoin (acetyl methyl carbinol), acetoin (natural), acetoin 98/100% FCC, acetoin liquid natural, acetoin liquid synthetic, acetoin natural, acetoin powder, acetoin powder 98/100% FCC, acetoin powder natural, acetoin powder synthetic, acetoin synth (3 hydroxy 2 butanone), natural, natural (congealed liquid), natural (powder), synthetic (congealed liquid) FCC, synthetic powder FCC, acetoin,dimer, acetoin,dimer natural, acetyl methyl carbinol natural, nat. acetyl methyl carbinol(acetoin), acetylmethylcarbinol, butan-2-one, 3-hydroxy-, 2-butanol-3-one, 2-butanone, 3-hydroxy-, dimethylketol, helio-bouquet, 2-hydroxy-3-butanone, 2-hydroxy-3-oxobutane, acetoin, acetoin, acetoin, acetoin, acetoin, acetoin 85% in water
Physical and chemical data
| Boiling Point | 148.0 °C |
| Melting Point | 15.0 °C |
| Flash Point | 41.0 °C |
| Density | 0.9972 |
| Refractive Index | 1.417 |
| Vapor Pressure | 2.69 [mmHg] |
| LogP | -0.3 |
| Solubility | Miscible in water. |
| Appearance | Acetyl methyl carbinol appears as a light-yellow colored liquid that can form a crystalline solid when it dimerizes. Slightly denser than water. Hence sinks in water. Used to make other chemicals. |
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.