[2-[(2-Methyl-1-undecen-1-yl)oxy]ethyl]benzene (CAS 2489743-82-8) — Woody Middle to base Note Fragrance Ingredient
[2-[(2-Methyl-1-undecen-1-yl)oxy]ethyl]benzene
CAS 2489743-82-8
What Is [2-[(2-Methyl-1-undecen-1-yl)oxy]ethyl]benzene?
[2-[(2-Methyl-1-undecen-1-yl)oxy]ethyl]benzene is a synthetic fragrance ingredient primarily used in fine perfumery. Consumers may encounter it as a subtle contributor to floral or woody fragrance compositions. This molecule matters because it represents modern perfumery’s ability to engineer novel scent profiles that don’t exist in nature, allowing for unique olfactory experiences.
Safety Profile
USE WITH AWARENESSWhat Does [2-[(2-Methyl-1-undecen-1-yl)oxy]ethyl]benzene Smell Like?
This synthetic molecule presents a nuanced olfactory profile that evolves from initial crisp green notes to a warmer, woody-amber foundation. The opening suggests crushed leaves with a metallic edge, transitioning to a smooth, almost velvety middle reminiscent of dried rose petals. The dry-down reveals subtle leathery facets with a whisper of clean musk, creating excellent diffusion and tenacity on skin. The overall effect is modern and abstract, bridging green and woody families with a polished sophistication.
2D Molecular Structure
SMILES: CCCCCCCCCC(C)=COCCC1=CC=CC=C1
Chemistry, Properties & Perfumer Guide
The Chemistry
[2-[(2-Methyl-1-undecen-1-yl)oxy]ethyl]benzene belongs to the aryl alkyl ether class of compounds. Its structure combines a benzene ring with an extended aliphatic chain featuring an unsaturated bond, contributing to both its volatility and tenacity. While not found in nature, its synthesis typically begins with undecenol derivatives that undergo etherification with phenethyl alcohol precursors. The 2-methyl substitution on the undecenyl chain creates steric hindrance that influences its odor characteristics and stability in formulations.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Molecular Weight | Estimated ~260 g/mol |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-3% | Up to 5% | Used as modifier in floral-woody accords |
| Functional Fragrance | 0.1-1% | Up to 2% | Provides subtle sophistication |
Classic Accords
Tip: Use to add dimensionality to synthetic sandalwood bases without overpowering floral heart notes.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA standards. No specific usage limits established.
RIFM Assessment
No RIFM assessment available as of current data. Recommended to follow general precautions for novel fragrance ingredients.
Sustainability
As a purely synthetic material, this ingredient avoids natural resource depletion but requires petrochemical feedstocks. Its relatively high molecular weight suggests moderate environmental persistence, though biodegradability data is lacking. Future green chemistry approaches may develop more sustainable synthetic routes as market demand develops.
Explore [2-[(2-Methyl-1-undecen-1-yl)oxy]ethyl]benzene
Browse essential oils and aroma compounds.
Browse on iHerb →Affiliate disclosure: we may earn a small commission at no extra cost to you.
References
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 2489743-82-8Physical Properties
| Molecular Weight | 288.5 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 7.9🔬 PubChem |
| Boiling Point | 369 °C🔬 EPA CompTox |
| Vapor Pressure | 0 mmHg @ 25°C📊 OPERA |
| Flash Point | 84.3 °C🔬 EPA CompTox |
| log Kp (skin permeability) | 1.149💻 Calculated |
| SMILES | CCCCCCCCCC(=COCCC1=CC=CC=C1)C🔬 PubChem |
Volatility & Performance
| Fragrance Note | Base💻 Calculated |
| Volatility Class | Very slow💻 Calculated |
| Persistence Score | 18 / 5💻 Calculated |
Odor & Flavor
| Primary Descriptors | greenwoody• leffingwell |
| Functional Groups | etheralkenearomatic💻 RDKit |
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: DTXSID501373043
Physical Properties
| Molecular Weight | 288.475 g/mol🔬 EPA CompTox |
| Density | 0.896 g/cm^3📊 OPERA |
| Boiling Point | 377.153 °C📊 OPERA |
| Melting Point | 3.573 °C📊 OPERA |
| Flash Point | 120.365 °C📊 OPERA |
| Refractive Index | 1.493 Dimensionless📊 OPERA |
| Molar Volume | 320.11 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 8.101 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 8.101 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 8.101 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 9.64 Log10 unitless📊 OPERA |
| Water Solubility | 0 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0 mmHg📊 OPERA |
| Viscosity | 9.769 cP📊 OPERA |
| Surface Tension | 31.657 dyn/cm📊 OPERA |
| Thermal Conductivity | 140.954 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 9.23 Ų💻 Computed |
| H-Bond Donors | 0 count💻 Computed |
| H-Bond Acceptors | 1 count💻 Computed |
| Rotatable Bonds | 12 count💻 Computed |
| Aromatic Rings | 1 count💻 Computed |
| Molar Refractivity | 93.042 cm^3/mol📊 OPERA |
| Polarizability | 36.885 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.
