Fatty acids, linseed-oil (CAS 68424-45-3) — Woody Base Note Fragrance Ingredient
Fatty acids, linseed-oil
CAS 68424-45-3
What Is Fatty acids, linseed-oil?
Fatty acids from linseed oil are synthetic compounds derived from flaxseed oil. They’re primarily used in industrial applications like paints, varnishes, and coatings rather than consumer fragrances. These fatty acids contribute to the drying properties of oil-based products. While not commonly found in perfumery, they may appear in niche artisanal fragrances seeking an oily, slightly nutty undertone.
Safety Profile
GENERALLY SAFEWhat Does Fatty acids, linseed-oil Smell Like?
Linseed oil fatty acids possess a characteristic oily, slightly nutty aroma with waxy undertones. The scent evolves from an initial sharp, greenish impression to a smoother, more rounded fatty character over time. In dilution, it can recall the scent of raw flaxseeds or sunflower oil, with a faint metallic edge that distinguishes it from other vegetable oils. The dry-down leaves a subtle, persistent waxy note that blends well with woody and resinous materials.
Chemistry, Properties & Perfumer Guide
The Chemistry
Linseed oil fatty acids are primarily composed of unsaturated fatty acids including linolenic, linoleic, and oleic acids. These are typically obtained through hydrolysis of linseed oil triglycerides followed by fractionation. The synthetic version allows for more consistent composition compared to natural extracts. The unsaturated nature makes these acids prone to oxidation, which contributes to their drying properties in industrial applications.
Physical & Chemical Properties
| Appearance | Yellowish viscous liquid |
|---|---|
| Solubility | Insoluble in water, soluble in organic solvents |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Industrial Products | 10-30% | 5-50% | Primary component in drying oils |
| Artisanal Fragrances | 0.1-1% | Up to 3% | Used for waxy, oily nuances |
Classic Accords
Tip: Use sparingly in fragrance compositions to add subtle waxy complexity without overwhelming the blend.
Alternatives & Comparisons
Offers similar fatty characteristics with slightly less oxidation tendency and a cleaner profile.
Pure fatty acid with less complexity but more predictable behavior in formulations.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not restricted by IFRA
GHS Classification
RIFM Assessment
No specific RIFM assessment available for this mixture.
Sustainability
Synthetic production reduces agricultural impact compared to natural extraction. However, the petrochemical origin raises sustainability concerns. Some manufacturers offer partially bio-based versions derived from renewable resources. Proper disposal is important due to potential aquatic toxicity.
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References
- Gunstone, F.D. (2004). The Chemistry of Oils and Fats. Blackwell Publishing.
- Kirk-Othmer Encyclopedia of Chemical Technology (2006). Fatty Acids. Wiley.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 68424-45-3Physical 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.
