Alpha Irone
Aroma Chemical Base Note CAS 79-69-6
Refined, powdery orris with a soft violet character and a faint fruity, woody facet. Highly diffusive and radiant, it is the precious heart of orris and violet accords.
Odor profile
| Note | Base Note |
| Descriptor 1 | Floral |
| Descriptor 2 | Iris |
| Descriptor 3 | Violet |
| Odor Impact1 | 100 |
| Tenacity2 | 104 h |
1 Source: PerfumersWorld
2 Source: The Good Scents Company
Identification
| CAS Number | 79-69-6 |
| INCI Name | 5-methyl-alpha-ionone |
| Category | Aroma Chemical |
| Formula | C14H22O |
| Mol. Weight | 206.32 |
| IUPAC Name | (E)-4-(2,5,6,6-tetramethylcyclohex-2-en-1-yl)but-3-en-2-one |
| InChIKey | JZQOJFLIJNRDHK-CMDGGOBGSA-N |
Synonyms
6-methyl Ionone; 6-methyl-alpha-ionone; 4-(2,5,6,6-Tetramethyl-2-cyclohexenyl)-3-buten-2-one; 4-(2,5,6,6-Tetramethyl-2-cyclohexen-1-yl)-3-buten-2-one; (Z)-2,6-(Z)-21,22-alpha-irone; cis-(2,6)-cis- (2(1),2(2))-alpha-irone; cis-2,6-cis-21,2 2-alpha-irone; irone alfa; irone alpha; irone alpha refined; 4-(2,5,6,6-tetramethyl cyclohex-2-enyl) but-3-en-2-one; cis-4-(2,5,6,6-tetramethyl cyclohex-2-enyl) but-3-en-2-one; (E)-4-(2,5,6,6-tetramethyl-1-cyclohex-2-enyl)but-3-en-2-one
Physical and chemical data
| Boiling Point | 111 °C @ 3 mmHg |
| Melting Point | 25.0 °C |
| Flash Point | 127 °C |
| Density | 0.932 |
| Refractive Index | 1.497 |
| Vapor Pressure | 0.004000 mmHg @ 25.00 C. (est) |
| LogP | 3.2 |
| Solubility | 110 mg/L @ 20 °C (exp) |
| Appearance | Solid |
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.