7-Nonen-2-ol, 4,8-dimethyl-, (4S)- (CAS 379693-55-7) — Green Top to middle Note Fragrance Ingredient
7-_Nonen-_2-_ol, 4,_8-_dimethyl-_, (4S)_-
CAS 379693-55-7
What Is 7-_Nonen-_2-_ol, 4,_8-_dimethyl-_, (4S)_-?
This synthetic fragrance ingredient is a specialized molecule used by perfumers to create unique scent profiles. While not commonly encountered in everyday products, it appears in niche and artistic fragrances. Its importance lies in its ability to contribute distinctive green, marine, or ozonic nuances that are difficult to achieve with natural materials alone.
Safety Profile
USE WITH AWARENESSWhat Does 7-_Nonen-_2-_ol, 4,_8-_dimethyl-_, (4S)_- Smell Like?
This molecule delivers a crisp, aquatic freshness reminiscent of sea breeze meeting coastal vegetation. The initial burst carries a slightly metallic edge that quickly softens into a dewy green character, like crushed stems after rain. As it evolves, subtle fruity undertones emerge – imagine unripe melon rind with a whisper of citrus zest. The dry-down reveals a clean, almost mineralic quality that lingers close to the skin.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Chemistry, Properties & Perfumer Guide
The Chemistry
This chiral molecule belongs to the unsaturated alcohol class, featuring a nine-carbon chain with hydroxyl and methyl groups at specific positions. The (4S) stereochemistry influences its odor profile and strength. Synthesized through controlled oxidation of corresponding alkenes or via Grignard reactions, its production requires careful control to maintain optical purity. The molecular structure suggests moderate polarity and volatility, making it useful as a top-to-middle note modifier.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Solubility | Soluble in alcohol, insoluble in water |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Marine and green accords |
| Functional Fragrance | 0.1-0.5% | Up to 1% | Clean and fresh applications |
Classic Accords
Tip: Stabilize in ethanol before adding to aqueous systems to prevent cloudiness.
Alternatives & Comparisons
Offers similar green-fruity aspects but with greater tenacity and less marine character.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No specific IFRA restrictions currently apply to this material.
RIFM Assessment
Under evaluation by RIFM; preliminary data suggests low sensitization potential.
Sustainability
As a synthetic material, its production avoids natural resource depletion. However, the multi-step synthesis requires energy input and generates byproducts that must be properly managed. Future green chemistry approaches may improve its environmental profile.
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