Ethyl linolenate (CAS 1191-41-9) — Green Middle Note Fragrance Ingredient
Ethyl linolenate
CAS 1191-41-9
What Is Ethyl linolenate?
Ethyl linolenate is a synthetic fragrance ingredient occasionally used in perfumery. It belongs to the ester family, contributing subtle green and fatty notes. You might encounter traces of it in some modern floral or woody fragrances. While not a dominant note, ethyl linolenate plays a supporting role in creating depth and complexity in certain perfume compositions.
Safety Profile
GENERALLY SAFEWhat Does Ethyl linolenate Smell Like?
Ethyl linolenate presents a delicate interplay of green and fatty characteristics, reminiscent of crushed leaves with an underlying waxy nuance. The scent evolves subtly, starting with a faintly herbaceous top note that gradually reveals a soft, oily heart. In dry-down, it contributes a barely perceptible fatty-woody background that helps blend sharper notes. While not overpowering, it adds dimensionality when used in trace amounts.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
2D Molecular Structure
SMILES: CCOC(=O)CCCCCCC\C=C/C\C=C/C\C=C/CC
Chemistry, Properties & Perfumer Guide
The Chemistry
Ethyl linolenate is an ethyl ester of linolenic acid, belonging to the fatty acid ester class. While naturally occurring in some seed oils, the fragrance material is typically produced synthetically through esterification processes. The molecular structure features multiple double bonds that contribute to its subtle green character.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-0.5% | Up to 1% | Background modifier |
| Functional Fragrance | 0.05-0.2% | Up to 0.5% | Green nuance enhancer |
Classic Accords
Tip: Use sparingly to add depth to green compositions without overwhelming the formula.
Alternatives & Comparisons
Similar fatty-green character with slightly less intensity, useful when a softer effect is desired.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions apply.
RIFM Assessment
No specific RIFM assessment found for this material.
Sustainability
As a synthetic material, ethyl linolenate avoids agricultural sourcing concerns. Production typically uses petrochemical feedstocks, though bio-based routes may be possible through fermentation-derived ethanol and fatty acids.
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Physicochemical Properties
DTXSID: DTXSID6025307
Physical Properties
| Molecular Weight | 306.49 g/mol🔬 EPA CompTox |
| Density | 0.892 g/cm^3🔬 EPA CTX |
| Boiling Point | 362.291 °C📊 OPERA |
| Melting Point | -26.444 °C📊 OPERA |
| Flash Point | 100.8 °C🔬 EPA CTX |
| Refractive Index | 1.475 Dimensionless📊 OPERA |
| Molar Volume | 342.997 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 6.924 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 6.924 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 6.924 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 9.68 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 | 4.811 cP📊 OPERA |
| Surface Tension | 28.867 dyn/cm📊 OPERA |
| Thermal Conductivity | 151.022 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 | 14 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 96.654 cm^3/mol📊 OPERA |
| Polarizability | 38.317 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.
