2,6,10-Trimethylundeca-5,9-dienol (CAS 24048-14-4) — Woody Heart Note Fragrance Ingredient
2,6,10-Trimethylundeca-5,9-dienol
CAS 24048-14-4
What Is 2,6,10-Trimethylundeca-5,9-dienol?
2,6,10-Trimethylundeca-5,9-dienol is a synthetic fragrance ingredient used in perfumery for its woody, floral, and slightly citrusy notes. It is commonly found in fine fragrances, personal care products, and household items. This ingredient helps create depth and complexity in scents, making it a valuable tool for perfumers.
Safety Profile
GENERALLY SAFEWhat Does 2,6,10-Trimethylundeca-5,9-dienol Smell Like?
2,6,10-Trimethylundeca-5,9-dienol offers a complex olfactory profile with woody undertones, floral nuances, and a hint of citrus. It evolves from a fresh, slightly green top note to a warm, floral heart, settling into a soft, woody base. The dry-down is smooth and lingering, adding a subtle richness to fragrances.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used to enhance the floral and woody accords, adding depth and longevity to the iconic fragrance.
Contributes to the floral bouquet, providing a subtle woody backdrop that balances the bright top notes.
2D Molecular Structure
SMILES: CC(CO)CCC=C(C)CCC=C(C)C
Chemistry, Properties & Perfumer Guide
The Chemistry
2,6,10-Trimethylundeca-5,9-dienol is a synthetic terpenoid alcohol. It is part of the sesquiterpenoid family, known for their woody and floral characteristics. The molecule is synthesized through controlled chemical reactions to achieve the desired olfactory properties.
Physical & Chemical Properties
| Boiling Point | N/A |
|---|---|
| Density | N/A |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-5% | Up to 10% | Adds depth and complexity |
| Personal Care | 0.5-2% | Up to 5% | Used for its floral-woody character |
Classic Accords
Tip: Use in floral and woody accords to enhance depth and longevity.
Alternatives & Comparisons
Natural alternative with similar woody notes but different floral nuances.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No restrictions under IFRA standards.
EU Allergen Declaration
Not listed as an EU allergen.
RIFM Assessment
Assessed as safe for use in fragrances by RIFM.
Sustainability
As a synthetic ingredient, it is produced in controlled environments, reducing the need for natural resource extraction. The production process can be optimized for minimal environmental impact.
Explore 2,6,10-Trimethylundeca-5,9-dienol
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: 2,6,10-Trimethylundeca-5,9-dienol PubChem
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 24048-14-4Physical Properties
| Molecular Weight | 210.36 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 4.5🔬 PubChem |
| Boiling Point | 287 °C🔬 EPA CompTox |
| Vapor Pressure | 0.0032 mmHg @ 25°C📊 OPERA |
| Flash Point | 109.3 °C🔬 EPA CompTox |
| Involatility Index | 0.0002💻 Calculated |
| log Kp (skin permeability) | -0.788💻 Calculated |
| SMILES | CC(CCC=C(C)CCC=C(C)C)CO🔬 PubChem |
Volatility & Performance
| Fragrance Note | Base💻 Calculated |
| Volatility Class | Very slow💻 Calculated |
| Persistence Score | 5.7 / 5💻 Calculated |
Odor & Flavor
| Primary Descriptors | floralwoody• leffingwell |
| Functional Groups | alcoholalkene💻 RDKit |
Regulatory Status
| IFRA Listed | Yes — see IFRA Standards for category limits⚖️ IFRA 51 |
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: DTXSID40865130
Physical Properties
| Molecular Weight | 210.361 g/mol🔬 EPA CompTox |
| Density | 0.87 g/cm^3🔬 EPA CTX |
| Boiling Point | 291.443 °C📊 OPERA |
| Melting Point | 22.311 °C📊 OPERA |
| Flash Point | 107.015 °C📊 OPERA |
| Refractive Index | 1.47 Dimensionless📊 OPERA |
| Molar Volume | 244.344 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 4.686 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 4.686 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 4.686 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 9.22 Log10 unitless📊 OPERA |
| Water Solubility | 0 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.001 mmHg📊 OPERA |
| Viscosity | 10.58 cP📊 OPERA |
| Surface Tension | 28.655 dyn/cm📊 OPERA |
| Thermal Conductivity | 145.252 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 | 7 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 68.204 cm^3/mol📊 OPERA |
| Polarizability | 27.038 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.
