Cedarwood oil, terpeneless (CAS 68603-22-5) — Woody Base Note Fragrance Ingredient
Cedarwood oil, terpeneless
CAS 68603-22-5
What Is Cedarwood oil, terpeneless?
Terpeneless cedarwood oil is a refined version of traditional cedarwood essential oil, with the lighter terpene components removed. You’ll encounter it in premium colognes, aftershaves, and home fragrance products. This processing creates a smoother, longer-lasting woody scent that doesn’t overpower other ingredients. The terpeneless version matters because it offers perfumers a more stable, concentrated woody base that blends seamlessly without the sharp top notes of regular cedarwood oil. It’s particularly valued in masculine fragrances and woody-ambery compositions.
Safety Profile
GENERALLY SAFEWhat Does Cedarwood oil, terpeneless Smell Like?
Terpeneless cedarwood oil presents a rich, velvety woodiness without the resinous bite of its unrefined counterpart. Imagine the heart of an antique cedar chest – warm, slightly sweet, with a polished smoothness that reveals creamy sandalwood-like undertones as it dries. The opening is immediately woody but rounded, transitioning to a dry, pencil-shaving quality mid-development, before settling into a long-lasting base of sweet, slightly musky dry wood. Unlike regular cedarwood oil, it lacks the piney sharpness, making it ideal for fragrances requiring sustained woody depth without harshness.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Jean-Claude Ellena used terpeneless cedarwood to create the smooth mineral-woody backbone, allowing the flint and citrus notes to shine without competing with harsh wood tones.
This sandalwood-focused fragrance employs terpeneless cedarwood to add dry wood structure while maintaining the creamy softness central to the composition.
The refined cedarwood note provides polished masculine warmth that complements the earthy vetiver without overwhelming its delicate facets.
Terpeneless cedarwood adds dry pencil-shaving texture to the signature sandalwood accord, creating the fragrance’s distinctive woody-papery character.
Used extensively to build the ink-like woody darkness, where its smoothness prevents the composition from becoming too harsh or medicinal.
Chemistry, Properties & Perfumer Guide
The Chemistry
Terpeneless cedarwood oil is produced through molecular distillation or solvent extraction of Virginian cedarwood oil (Juniperus virginiana) or Texas cedarwood oil (Juniperus mexicana), removing the volatile monoterpenes (mainly α-cedrene and thujopsene) while concentrating the sesquiterpenes and oxygenated compounds. The process increases the relative percentage of cedrol (a tertiary alcohol) and other sesquiterpene alcohols, which are responsible for the material’s enhanced fixative properties and smoother olfactory profile. Unlike fractionated cedarwood oils, terpeneless versions undergo more extensive processing to achieve near-complete terpene removal.
Physical & Chemical Properties
| Appearance | Pale yellow to amber viscous liquid |
|---|---|
| Flash Point | >100 °C |
| Solubility | Soluble in ethanol, fixed oils; insoluble in water |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 5-12% | Up to 20% | Provides woody foundation without terpene interference |
| Home Fragrance | 2-8% | Up to 15% | Long-lasting woody diffusion |
| Personal Care | 0.5-3% | Up to 5% | Skin-friendly woody note |
| Functional Products | 0.1-1% | Up to 2% | Masking agent for woody character |
Classic Accords
Tip: Use terpeneless cedarwood as a fixative for citrus top notes – its smooth profile won’t clash with delicate aromachemicals.
Alternatives & Comparisons
Synthetic amber-woody material with similar dry-down characteristics but more amber sweetness. Useful when a less natural profile is acceptable.
Semi-synthetic ionone derivative offering woody-ambery effects with superior diffusion. Better for modern compositions needing projection.
The key constituent isolated from cedarwood. Provides pure woody character without complexity, useful for precision formulations.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions apply to terpeneless cedarwood oil (IFRA 49th Amendment). The removal of potential sensitizing terpenes makes it more skin-friendly than standard cedarwood oils.
RIFM Assessment
RIFM considers terpeneless cedarwood oil safe for current fragrance use levels based on its composition and processing history.
Sustainability
Sourcing of cedarwood for terpeneless production is generally sustainable, with Juniperus virginiana being abundant in North America. The molecular distillation process is energy-intensive but results in a material requiring lower usage levels. Some producers utilize byproducts from cedar timber operations. Synthetic alternatives exist but lack the natural complexity. Responsible suppliers adhere to sustainable harvesting practices to protect cedar ecosystems.
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References
- Arctander, S. (1960). Perfume and Flavor Materials of Natural Origin.
- Bauer, K. et al. (2001). Common Fragrance and Flavor Materials.
- Sell, C. (2006). The Chemistry of Fragrances.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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