10-Undecen-1-yl acetate (CAS 112-19-6) — Citrus Top Note Fragrance Ingredient
10-Undecen-1-yl acetate
CAS 112-19-6
What Is 10-Undecen-1-yl acetate?
10-Undecen-1-yl acetate is a synthetic fragrance ingredient with a fresh, fruity, and slightly citrusy aroma. It’s commonly used in personal care products and fine fragrances to add a bright, uplifting top note. This molecule matters because it provides a cost-effective alternative to natural citrus oils while offering better stability in formulations.
Safety Profile
GENERALLY SAFEWhat Does 10-Undecen-1-yl acetate Smell Like?
10-Undecen-1-yl acetate opens with a burst of fresh citrus, reminiscent of ripe grapefruit peel. As it evolves, it reveals a juicy pear-like fruitiness with a hint of green apple. The dry-down is clean and slightly waxy, like the skin of a freshly washed apple. Its linear character makes it reliable in formulations, maintaining its bright profile without turning cloying.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used here for its invigorating citrus-fruity top note that blends seamlessly with herbal and woody accords, creating a refreshing yet balanced opening.
2D Molecular Structure
SMILES: CC(=O)OCCCCCCCCCC=C
Chemistry, Properties & Perfumer Guide
The Chemistry
10-Undecen-1-yl acetate is an unsaturated fatty acid ester. It’s synthesized through esterification of 10-undecen-1-ol with acetic acid, typically using acid catalysis. The double bond at the 10-position contributes to its fresh, green character while the acetate group provides fruity aspects. This combination makes it more stable than natural citrus terpenes while delivering similar olfactory effects.
Physical & Chemical Properties
| Boiling Point | 245 °C |
|---|---|
| Density | 0.88 g/cm³ |
| Flash Point | >100 °C |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-5% | Up to 10% | Adds fresh top notes |
| Personal Care | 0.5-3% | Up to 5% | Provides clean, fruity character |
Classic Accords
Tip: Use with citrus oils to extend their freshness and prevent rapid evaporation.
Alternatives & Comparisons
When a more intense fruity-green character is desired, with better longevity.
For a more floral-citrus profile, though less fruity than 10-undecen-1-yl acetate.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not restricted by IFRA. Safe for use in all categories.
RIFM Assessment
RIFM assessment confirms safety at current usage levels.
Sustainability
As a synthetic material, 10-undecen-1-yl acetate has consistent quality and doesn’t depend on agricultural harvests. Its production has relatively low environmental impact compared to some natural alternatives. The synthetic route allows for precise control over impurities.
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References
- PubChem Compound Summary for 10-Undecen-1-yl acetate PubChem
- Arctander, S. (1969). Perfume and Flavor Chemicals.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 112-19-6Physical Properties
| Molecular Weight | 212.33 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 4.5🔬 PubChem |
| Boiling Point | 269 °C🔬 EPA CompTox |
| log Kp (skin permeability) | -0.8💻 Calculated |
| SMILES | CC(=O)OCCCCCCCCCC=C🔬 PubChem |
Volatility & Performance
| Fragrance Note | Heart💻 Calculated |
Odor & Flavor
| Primary Descriptors | fattyfloralhoneyrose• leffingwell |
| Functional Groups | esteretheralkene💻 RDKit |
| “Mildly fruity, fatty-floral, Honey-Rose type odor of good tenacity. Variations in this odor picture are observed in products from different suppliers.”📖 Arctander | |
| 10-Undecen-1-yl acetate has a light, rose-like odor with a fatty, somewhat agreeable flavor.📖 Fenaroli | |
Flavor Notes (Arctander)
| “Concentrations below 20 ppm have refreshingly fruity-citrussy taste, but this impression is not truly pleasant without a food acid. The ester is also used in trace amounts in fruit and Citrus imitation flavor compositions. The concentration in finished products may be about 3 to 15 ppm.”📖 Arctander |
Regulatory Status
| FEMA Number | FEMA 3096⚖️ FEMA GRAS |
| GRAS Status | Generally Recognized as Safe⚖️ FEMA GRAS |
| IOFI Classification | Artificial📖 Fenaroli |
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: DTXSID80861737
Physical Properties
| Molecular Weight | 212.333 g/mol🔬 EPA CompTox |
| Density | 0.874 g/cm^3📊 OPERA |
| Boiling Point | 270 °C🔬 EPA CTX |
| Melting Point | -32.801 °C📊 OPERA |
| Flash Point | 104.926 °C📊 OPERA |
| Refractive Index | 1.441 Dimensionless📊 OPERA |
| Molar Volume | 241.699 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 4.859 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 4.859 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 4.859 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 | 0.008 mmHg📊 OPERA |
| Viscosity | 2.52 cP📊 OPERA |
| Surface Tension | 29.112 dyn/cm📊 OPERA |
| Thermal Conductivity | 143.577 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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