Methyl linoleate (48%) methyl linolenate (52%) mixture (CAS 301-00-8) — Woody Base Note Fragrance Ingredient
Methyl linoleate (48%) methyl linolenate (52%) mixture
CAS 301-00-8
What Is Methyl linoleate (48%) methyl linolenate (52%) mixture?
This ingredient is a synthetic mixture primarily used as a fragrance fixative and blending agent in perfumery. Consumers might encounter it in the base notes of woody or oriental fragrances where it helps stabilize more volatile components. While not a star ingredient, it plays a crucial supporting role by subtly enhancing longevity and smoothing transitions between notes.
Safety Profile
GENERALLY SAFEWhat Does Methyl linoleate (48%) methyl linolenate (52%) mixture Smell Like?
The mixture presents a faint, dry woody character with subtle fatty undertones reminiscent of linseed oil. Initially neutral, it develops a soft, paper-like aroma that serves as an excellent carrier for other materials. Its odor profile is intentionally mild, functioning more as a structural element than a distinctive scent. Over time, it contributes a barely perceptible waxy-green nuance that helps bridge floral and woody accords.
2D Molecular Structure
SMILES: CC\C=C/C\C=C/C\C=C/CCCCCCCC(=O)OC
Chemistry, Properties & Perfumer Guide
The Chemistry
This synthetic mixture combines methyl esters of linoleic and linolenic acids, derived through esterification of fatty acids from vegetable sources. The 48:52 ratio is carefully controlled to achieve optimal performance characteristics. These unsaturated fatty acid esters undergo transesterification reactions during production. Their molecular structures feature long carbon chains with multiple double bonds that influence both physical properties and odor characteristics.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Fixative base component |
| Functional Fragrance | 1-3% | Up to 8% | Blending agent |
Classic Accords
Tip: Use as a neutral carrier for polar materials that need extended diffusion.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions apply to this material.
RIFM Assessment
Not currently assessed by RIFM.
Sustainability
Synthesized from renewable vegetable sources, this material represents a sustainable alternative to animal-derived fixatives. Production involves minimal waste streams and can utilize byproducts from food industry processes. The synthetic route ensures consistent quality without seasonal variations.
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Physicochemical Properties
DTXSID: DTXSID5041560
Physical Properties
| Molecular Weight | 292.463 g/mol🔬 EPA CompTox |
| Density | 0.895 g/cm^3🔬 EPA CTX |
| Boiling Point | 353.575 °C📊 OPERA |
| Melting Point | -29.595 °C📊 OPERA |
| Flash Point | 113.05 °C🔬 EPA CTX |
| Refractive Index | 1.476 Dimensionless📊 OPERA |
| Molar Volume | 326.49 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 6.29 Log10 unitless🔬 EPA CTX |
| LogD (pH 5.5) | 6.41 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 6.41 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 8.64 Log10 unitless📊 OPERA |
| Water Solubility | 0 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole🔬 EPA CTX |
Transport Properties
| Vapor Pressure | 0 mmHg🔬 EPA CTX |
| Viscosity | 4.359 cP📊 OPERA |
| Surface Tension | 28.812 dyn/cm📊 OPERA |
| Thermal Conductivity | 150.417 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 | 13 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 92.021 cm^3/mol📊 OPERA |
| Polarizability | 36.48 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.
