Alcohols, C16-18 and C18-unsaturated (CAS 68002-94-8) — Woody Base Note Fragrance Ingredient
Alcohols, C16-_18 and C18-_unsaturated
CAS 68002-94-8
What Is Alcohols, C16-_18 and C18-_unsaturated?
This synthetic ingredient is a blend of long-chain alcohols primarily used as a base in perfumes and personal care products. Consumers encounter it in the base notes of fragrances where it provides stability and texture. It serves as a foundational element in many cosmetic formulations, helping to carry and slowly release other fragrance components over time.
Safety Profile
GENERALLY SAFEWhat Does Alcohols, C16-_18 and C18-_unsaturated Smell Like?
This alcohol blend is nearly odorless, serving primarily as a functional carrier rather than an aromatic contributor. Its subtle waxy, fatty character only becomes noticeable at high concentrations, reminiscent of candle wax or unscented cosmetics. In formulations, it provides a neutral background that allows other fragrance ingredients to shine without interference. The material’s molecular weight ensures it remains present through drydown, subtly influencing the fragrance’s texture and longevity.
Chemistry, Properties & Perfumer Guide
The Chemistry
This material is a synthetic mixture of straight-chain and unsaturated C16-C18 alcohols, typically produced through the hydrogenation of fatty acid methyl esters derived from plant or animal sources. The exact composition varies by manufacturer but generally contains primarily cetyl (C16) and stearyl (C18) alcohols with minor amounts of oleyl alcohol (C18:1). The production process involves catalytic hydrogenation under controlled conditions to achieve the desired chain length distribution and degree of unsaturation.
Physical & Chemical Properties
| Appearance | White waxy solid |
|---|---|
| Melting Point | 45-55 °C |
| Solubility | Insoluble in water, soluble in alcohols and oils |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-5% | Up to 10% | Texture modifier |
| Body Lotions | 2-8% | Up to 15% | Emollient base |
| Candles | 3-10% | Up to 20% | Wax modifier |
Classic Accords
Tip: Use to modify texture and improve fragrance oil solubility in anhydrous systems.
Alternatives & Comparisons
Pure C16 alcohol for more predictable crystallization behavior in formulations.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not restricted by IFRA
RIFM Assessment
Considered safe for current use levels in cosmetics by RIFM.
Sustainability
While synthetic in final form, the raw materials are often derived from renewable plant sources like palm or coconut oil. The environmental impact depends on the sourcing practices of the original fatty acids. Some manufacturers offer RSPO-certified versions. Compared to petrochemical alternatives, these alcohols generally have a lower carbon footprint.
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