Ethyl 10-undecenoate (CAS 692-86-4) — Sweet Top-Middle Note Fragrance Ingredient
Ethyl 10-undecenoate
CAS 692-86-4
What Is Ethyl 10-undecenoate?
Ethyl 10-undecenoate is a synthetic ester used in perfumery for its fruity, waxy character. It’s found in artificial fruit flavors and some floral fragrances. This ingredient matters because it provides cost-effective fruity notes that persist longer than natural extracts, making modern fragrances more accessible.
Safety Profile
GENERALLY SAFEWhat Does Ethyl 10-undecenoate Smell Like?
Ethyl 10-undecenoate opens with a burst of ripe pear skin and banana esters, slightly waxy like a candle shop. The heart reveals cleaner fruity tones reminiscent of laundry detergent fruitiness. Dry-down leaves a faint, pleasant vinyl-like impression that blends well with woody bases.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used to amplify the hyper-realistic green apple and pear notes in this futuristic floral composition.
Provides subtle fruity lift to the pineapple top note in this modern masculine classic.
2D Molecular Structure
SMILES: CCOC(=O)CCCCCCCCC=C
Chemistry, Properties & Perfumer Guide
The Chemistry
Ethyl 10-undecenoate belongs to the ester class, specifically undecenoic acid esters. It’s produced via esterification of 10-undecenoic acid with ethanol. The double bond at position 10 makes it more reactive than saturated esters. Industrial synthesis typically uses acid catalysts under reflux conditions.
Physical & Chemical Properties
| Boiling Point | 258-260 °C |
|---|---|
| Density | 0.879 g/cm³ |
| Refractive Index | 1.438-1.442 |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | Fruity modifier |
| Functional Fragrance | 0.5-2% | Up to 3% | Laundry fruitiness |
Classic Accords
Tip: Use with citrus top notes to prevent waxy buildup in dry-down.
Alternatives & Comparisons
More pear-like character with less waxiness, but higher cost.
Stronger tropical fruit effect with better diffusion.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No restrictions under IFRA 49th Amendment.
RIFM Assessment
RIFM assessed – no significant safety concerns at current usage levels.
Sustainability
Synthetic production from petrochemical feedstocks raises some environmental concerns, but small usage quantities minimize impact. No known natural sources exist for this specific ester.
Explore Ethyl 10-undecenoate
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References
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorPhysicochemical Properties
DTXSID: DTXSID4044828
Physical Properties
| Molecular Weight | 212.333 g/mol🔬 EPA CompTox |
| Density | 0.878 g/cm^3🔬 EPA CTX |
| Boiling Point | 262.5 °C🔬 EPA CTX |
| Melting Point | -38 °C🔬 EPA CTX |
| Flash Point | 144.2 °C🔬 EPA CTX |
| Refractive Index | 1.441 Dimensionless📊 OPERA |
| Molar Volume | 241.699 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 4.719 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 4.719 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 4.719 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 6.69 Log10 unitless📊 OPERA |
| Water Solubility | 0 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.007 mmHg📊 OPERA |
| Viscosity | 2.498 cP📊 OPERA |
| Surface Tension | 29.06 dyn/cm📊 OPERA |
| Thermal Conductivity | 142.909 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 26.3 Ų💻 Computed |
| H-Bond Donors | 0 count💻 Computed |
| H-Bond Acceptors | 2 count💻 Computed |
| Rotatable Bonds | 10 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 63.776 cm^3/mol📊 OPERA |
| Polarizability | 25.283 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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