2-Octen-4-One
Aroma Chemical Top Note CAS 4643-27-0
A yeasty fruity note with a fresh green character. Used in traces, it adds a natural fermented lift to fruity and savoury accords.
Odor profile
| Note | Top Note |
| Descriptor 1 | Fruity |
| Descriptor 2 | Sweet |
| Descriptor 3 | Tropical-Fruit |
| Odor Impact1 | 250 |
1 Source: PerfumersWorld
Identification
| CAS Number | 4643-27-0 |
| Category | Aroma Chemical |
| Formula | C8H14O |
| Mol. Weight | 126.20 |
| IUPAC Name | (E)-oct-2-en-4-one |
| InChIKey | FMDLEUPBHMCPQV-GQCTYLIASA-N |
Synonyms
butyl propenyl ketone, oct-2-en-4-one, (E)- oct-2-en-4-one, propenyl butyl ketone, 2-Octen one, (2E)-oct-2-en-4-one, (E)-oct-2-en-4-one, 2 octen 4 one, (2E)-2-octen-4-one, 2-octen-4-one 96% trans, 2-octen-4-one natural, octen-4-one-2
Physical and chemical data
| Boiling Point | 179.00 °C |
| Flash Point | 57.78 °C |
| Density | 0.835 |
| Refractive Index | 1.44 |
| Vapor Pressure | 0.897000 mmHg @ 25.00 C. (est) |
| LogP | 2.1 |
| Solubility | insoluble in water; soluble in fats |
| Appearance | Colourless liquid; fruity floral odour |
Regulatory status
IFRA maximum concentrations
| Category | Use | Limit in the finished product |
|---|---|---|
| Category 1 | Lip products, toys | 0.0085 % |
| Category 2 | Deodorants, antiperspirants | 0.0025 % |
| Category 3 | Eye products | 0.051 % |
| Category 4 | Fine fragrance | 0.047 % |
| Category 5A | Body lotion | 0.012 % |
| Category 5B | Face cream | 0.012 % |
| Category 5C | Hand cream | 0.012 % |
| Category 5D | Baby creams, oils | 0.012 % |
| Category 6 | Oral care, mouthwash | 0.028 % |
| Category 7A | Rinse-off hair products | 0.096 % |
| Category 7B | Leave-on hair products | 0.096 % |
| Category 8 | Intimate and baby wipes | 0.0050 % |
| Category 9 | Soap, shampoo, rinse-off | 0.092 % |
| Category 10A | Household care, hand contact | 0.33 % |
| Category 10B | Aerosol air fresheners | 0.33 % |
| Category 11A | Intended skin contact | 0.18 % |
| Category 11B | Minimal skin contact | 0.18 % |
| Category 12 | No skin contact, candles | Not restricted |
| IFRA Amendment | 51 |
| Restriction Type | Restriction |
| Critical Effect | Dermal Sensitization |
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.