3,7-Dimethyloct-1-en-3-ol (CAS 18479-49-7) — Woody Middle Note Fragrance Ingredient
3,7-Dimethyloct-1-en-3-ol
CAS 18479-49-7
What Is 3,7-Dimethyloct-1-en-3-ol?
3,7-Dimethyloct-1-en-3-ol is a synthetic fragrance ingredient used in perfumes and scented products. It contributes fresh, woody, and slightly floral notes to compositions. This molecule matters because it helps create modern, clean scent profiles that are popular in personal care and household products.
Safety Profile
GENERALLY SAFEWhat Does 3,7-Dimethyloct-1-en-3-ol Smell Like?
3,7-Dimethyloct-1-en-3-ol opens with a crisp, green freshness reminiscent of crushed leaves, evolving into a smooth woody heart with subtle floral undertones. The dry-down reveals a clean, slightly musky base that lingers softly. Its character bridges fresh citrus top notes with deeper woody accords, making it versatile in modern fougère and chypre compositions.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used as a woody-green modifier to update classic fougère structures, providing contemporary freshness without losing depth.
2D Molecular Structure
SMILES: CC(C)CCCC(C)(O)C=C
Chemistry, Properties & Perfumer Guide
The Chemistry
3,7-Dimethyloct-1-en-3-ol belongs to the family of unsaturated alcohols. As a synthetic molecule, it’s typically produced through controlled organic synthesis routes involving carbonyl compounds and Grignard reagents. Its structure features both hydroxyl and alkene functional groups, contributing to its reactivity and odor profile.
Physical & Chemical Properties
| Boiling Point | Not available |
|---|---|
| Density | Not available |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-5% | Up to 10% | Used as a modifier in woody compositions |
Classic Accords
Tip: Use in conjunction with citrus top notes to create dynamic freshness in woody compositions.
Alternatives & Comparisons
Offers similar floral-woody character but with higher volatility and different blending properties.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No current IFRA restrictions.
RIFM Assessment
No specific RIFM assessment found.
Sustainability
As a synthetic ingredient, 3,7-Dimethyloct-1-en-3-ol has minimal environmental impact during production. Its synthesis can be optimized for atom economy and reduced waste, making it a sustainable choice compared to some natural alternatives.
Explore 3,7-Dimethyloct-1-en-3-ol
Browse essential oils and aroma compounds.
Browse on iHerb →Affiliate disclosure: we may earn a small commission at no extra cost to you.
References
- PubChem Compound Summary PubChem
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 18479-49-7Physical Properties
| Molecular Weight | 156.26 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 3🔬 PubChem |
| Boiling Point | 191.1 °C🔬 EPA CompTox |
| Vapor Pressure | 0.1875 mmHg @ 25°C📊 OPERA |
| Flash Point | 75 °C🔬 EPA CompTox |
| Involatility Index | 0.0162💻 Calculated |
| log Kp (skin permeability) | -1.523💻 Calculated |
| SMILES | CC(C)CCCC(C)(C=C)O🔬 PubChem |
Volatility & Performance
| Fragrance Note | Heart💻 Calculated |
| Volatility Class | Slow💻 Calculated |
| Persistence Score | 1.3 / 5💻 Calculated |
Odor & Flavor
| Primary Descriptors | camphoraceouscitrus• leffingwell |
| Functional Groups | alcoholalkene💻 RDKit |
| “Sweet and rosy, oily odor of moderate to poor tenacity. Less “waxy” than the odor of Dimethyloctanol (“’DMO”), but “fattier”’ and CH80H less tenacious, and with more initial power.”📖 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: DTXSID30864839
Physical Properties
| Molecular Weight | 156.269 g/mol🔬 EPA CompTox |
| Density | 0.835 g/cm^3🔬 EPA CTX |
| Boiling Point | 191.14 °C🔬 EPA CTX |
| Melting Point | -28.623 °C📊 OPERA |
| Flash Point | 75 °C🔬 EPA CTX |
| Refractive Index | 1.444 Dimensionless📊 OPERA |
| Molar Volume | 186.627 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 3.69 Log10 unitless🔬 EPA CTX |
| LogD (pH 5.5) | 3.133 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 3.133 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 6.24 Log10 unitless📊 OPERA |
| Water Solubility | 0.005 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.188 mmHg🔬 EPA CTX |
| Viscosity | 4.508 cP📊 OPERA |
| Surface Tension | 26.766 dyn/cm📊 OPERA |
| Thermal Conductivity | 136.85 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 | 5 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 49.562 cm^3/mol📊 OPERA |
| Polarizability | 19.648 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.
