9-Decen-1-ol (CAS 13019-22-2) — Green Top to mid Note Fragrance Ingredient
9-Decen-1-ol
CAS 13019-22-2
What Is 9-Decen-1-ol?
9-Decen-1-ol is a synthetic fragrance alcohol with a fresh, slightly floral-green character. It’s found in modern perfumes and functional fragrances like detergents. This ingredient matters because it adds a crisp, dewy quality to green and aquatic fragrances, helping create the illusion of freshly cut stems or morning dew on leaves.
Safety Profile
GENERALLY SAFEWhat Does 9-Decen-1-ol Smell Like?
9-Decen-1-ol opens with a burst of clean, waxy-green freshness reminiscent of cucumber skin and freshly snapped pea pods. The initial sharpness softens into a delicate floralcy, like the water droplets on greenhouse flowers. As it dries, it reveals a subtle musky-woody undertone, leaving a refined aquatic trail that’s more sophisticated than typical citrus top notes.
2D Molecular Structure
SMILES: OCCCCCCCCC=C
Chemistry, Properties & Perfumer Guide
The Chemistry
9-Decen-1-ol is a C10 unsaturated fatty alcohol with the double bond at position 9. As a synthetic molecule, it’s produced through hydroformylation of 1,9-decadiene followed by hydrogenation. The terminal hydroxyl group and mid-chain unsaturation create unique dipole interactions that influence both volatility and odor characteristics. Its structural similarity to natural leaf alcohols allows it to blend seamlessly in green accords.
Physical & Chemical Properties
| Appearance | Colorless liquid |
|---|---|
| Molecular Class | Unsaturated fatty alcohol |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Green modifier |
| Functional Fragrance | 1-3% | Up to 8% | Freshness booster |
Classic Accords
Tip: Use to add dimensionality to synthetic green notes without introducing harshness.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions as of Amendment 51 (2022).
RIFM Assessment
Considered safe for current fragrance use levels based on RIFM’s Cramer Class I evaluation.
Sustainability
As a fully synthetic material, 9-Decen-1-ol avoids agricultural land use but depends on petrochemical feedstocks. Its efficient synthesis (typically 3-4 steps from base chemicals) and low usage levels make it relatively sustainable compared to some natural alternatives requiring extensive cultivation.
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Ingredient Data Sheet
CAS 13019-22-2Physical Properties
| Molecular Weight | 156.26 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 3.6🔬 PubChem |
| Boiling Point | 236 °C🔬 EPA CompTox |
| Vapor Pressure | 0.0079 mmHg @ 25°C📊 OPERA |
| Flash Point | 98.9 °C🔬 EPA CompTox |
| Involatility Index | 0.0007💻 Calculated |
| log Kp (skin permeability) | -1.097💻 Calculated |
| SMILES | C=CCCCCCCCCO🔬 PubChem |
Volatility & Performance
| Fragrance Note | Heart💻 Calculated |
| Volatility Class | Very slow💻 Calculated |
| Persistence Score | 4 / 5💻 Calculated |
Odor & Flavor
| Primary Descriptors | aldehydicfreshrosewaxy• leffingwell |
| Functional Groups | alcoholalkene💻 RDKit |
| “As the patent by which this alcohol is manufactured is expiring, one might expect a flood of material coming on the market at lower cost, but it is most unlikely that this material will be manufactured by any great number of companies. It is not as easy as one should think to achieve the odor purity, and it is not easy to manufacture the alcohol on a large scale.”📖 Arctander | |
Physical data: PubChem (NIH/NLM), U.S. EPA CompTox Dashboard, EPA OPERA models, RDKit. Odor & flavor: Arctander (Perfume & Flavor Chemicals), Fenaroli's Handbook of Flavor Ingredients, Leffingwell. Thresholds: van Gemert (Compilations of Odour Threshold Values). Regulatory: IFRA Standards 51st, FEMA GRAS. Trade names: Surburg (Common Fragrance & Flavor Materials). All data compiled and cross-referenced for perfumertools.com.
Physicochemical Properties
DTXSID: DTXSID6047656
Physical Properties
| Molecular Weight | 156.269 g/mol🔬 EPA CompTox |
| Density | 0.855 g/cm^3🔬 EPA CTX |
| Boiling Point | 235.75 °C🔬 EPA CTX |
| Melting Point | -14.017 °C🔬 EPA CTX |
| Flash Point | 119 °C🔬 EPA CTX |
| Refractive Index | 1.446 Dimensionless📊 OPERA |
| Molar Volume | 186.203 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 3.516 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 3.516 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 3.516 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 7.58 Log10 unitless📊 OPERA |
| Water Solubility | 0.001 mol/L🔬 EPA CTX |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.008 mmHg📊 OPERA |
| Viscosity | 8.427 cP📊 OPERA |
| Surface Tension | 29.766 dyn/cm📊 OPERA |
| Thermal Conductivity | 157.287 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 20.23 Ų💻 Computed |
| H-Bond Donors | 1 count💻 Computed |
| H-Bond Acceptors | 1 count💻 Computed |
| Rotatable Bonds | 8 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 49.638 cm^3/mol📊 OPERA |
| Polarizability | 19.678 Å^3📊 OPERA |
Data Sources:
🔬 EPA Experimental data from U.S. EPA CompTox Chemicals Dashboard & CTX APIs. 📊 OPERA Predicted using EPA's OPERA QSAR models. 💻 Computed Calculated from SMILES using RDKit.
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