Fatty acids, C16-18 and C18-unsatd., Me esters (CAS 67762-38-3) — Woody N/A Note Fragrance Ingredient
Fatty acids, C16-18 and C18-unsatd., Me esters
CAS 67762-38-3
What Is Fatty acids, C16-18 and C18-unsatd., Me esters?
Fatty acid methyl esters (FAME) are synthetic compounds derived from plant or animal fats. You might encounter them as emollients in lotions or as biodiesel components. While not directly used in fragrances, they serve as precursors in fragrance manufacturing. These esters matter because they’re building blocks for creating more complex fragrance molecules through chemical processes like transesterification.
Safety Profile
GENERALLY SAFEWhat Does Fatty acids, C16-18 and C18-unsatd., Me esters Smell Like?
Fatty acid methyl esters typically have faint, waxy odors reminiscent of candle wax or cooking oils. The scent profile varies slightly based on chain length – shorter esters may have mildly fruity undertones while longer chains smell more neutral. These esters don’t evolve significantly on skin, maintaining their simple olfactory character throughout wear.
Chemistry, Properties & Perfumer Guide
The Chemistry
Fatty acid methyl esters are produced through esterification of fatty acids with methanol. The C16-18 and C18-unsaturated variants contain palmitic, stearic, and oleic acid derivatives. These esters serve primarily as intermediates in chemical synthesis rather than direct fragrance ingredients. Their production involves catalytic processes at moderate temperatures, often using alkaline catalysts.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Solubility | Insoluble in water, soluble in organic solvents |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fragrance Manufacturing | Not directly used | N/A | Chemical intermediate only |
| Cosmetics | 0.5-2% | Up to 5% | Emollient properties |
Classic Accords
Tip: Primarily used as a chemical feedstock rather than direct fragrance component.
Alternatives & Comparisons
Shorter chain ester with slightly more pronounced odor characteristics for formulations requiring mild waxy notes.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not restricted by IFRA
RIFM Assessment
Not currently assessed by RIFM as it’s not a direct fragrance ingredient.
Sustainability
Fatty acid methyl esters can be derived from renewable sources like vegetable oils, making them more sustainable than petroleum-derived alternatives. Their production generates minimal hazardous byproducts. However, sourcing concerns exist regarding palm oil derivatives, prompting some manufacturers to seek alternative feedstocks.
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Ingredient Data Sheet
CAS 67762-38-3Physical 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.
