2-Undecenenitrile (CAS 22629-48-7) — Green Top to Middle Note Fragrance Ingredient
2-Undecenenitrile
CAS 22629-48-7
What Is 2-Undecenenitrile?
2-Undecenenitrile is a synthetic fragrance ingredient used in perfumes and functional fragrances. It’s typically found in fine fragrances and household products where a fresh, green character is desired. This nitrile compound matters because it provides perfumers with a unique green-woody note that can enhance the freshness and natural feel of floral and chypre compositions without being overly aggressive.
Safety Profile
USE WITH AWARENESSWhat Does 2-Undecenenitrile Smell Like?
2-Undecenenitrile opens with a sharp, green burst reminiscent of crushed galbanum leaves and freshly cut cucumber skin. The initial intensity quickly softens into a smoother heart with aspects of young bamboo shoots and a faint metallic edge. As it dries down, it reveals a surprisingly warm, woody character with whispers of sandalwood sawdust and a clean, almost soapy undertone. The overall effect is of a sophisticated green note that bridges the gap between harsh vegetal materials and softer woody ambers.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used here to amplify the radical green freshness of the galbanum core, adding a modern synthetic edge to this classic green floral while improving stability.
Chemistry, Properties & Perfumer Guide
The Chemistry
2-Undecenenitrile belongs to the nitrile class of organic compounds, characterized by a carbon-nitrogen triple bond. This synthetic molecule is not known to occur naturally. It’s typically produced through the hydrocyanation of undecenal or related unsaturated hydrocarbons. The nitrile group contributes to the material’s stability in formulations while also influencing its odor characteristics. The specific positioning of the double bond in the undecene chain is crucial for its fresh-green olfactory properties.
Physical & Chemical Properties
| Boiling Point | Not well documented |
|---|---|
| Density | Not well documented |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-0.5% | Up to 1% | Green note modifier |
| Functional Fragrance | 0.05-0.2% | Up to 0.5% | Freshness booster |
Classic Accords
Tip: Use sparingly in floral compositions to add cutting-edge freshness without overwhelming delicate notes.
Alternatives & Comparisons
Offers similar green character but with more floral aspects and less metallic edge, suitable when a softer effect is desired.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No specific restrictions under current IFRA standards (Amendment 49).
RIFM Assessment
Not currently evaluated by RIFM but considered safe at documented usage levels.
Sustainability
As a synthetic material, 2-Undecenenitrile doesn’t rely on agricultural resources. Its production can be optimized for minimal environmental impact through green chemistry principles. Being highly potent, it’s used at low levels, reducing overall environmental load compared to some natural alternatives that require large-scale cultivation.
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