3-Cyclohexene-1-methanol, 3(or 4)-methyl-1-(2,2,3-trimethyl-3-cyclopenten-1-yl)-, acid-isomerized (CAS 426218-78-2) — Woody Middle to base Note Fragrance Ingredient
3-Cyclohexene-1-methanol, 3(or 4)-methyl-1-(2,2,3-trimethyl-3-cyclopenten-1-yl)-, acid-isomerized
CAS 426218-78-2
What Is 3-Cyclohexene-1-methanol, 3(or 4)-methyl-1-(2,2,3-trimethyl-3-cyclopenten-1-yl)-, acid-isomerized?
This synthetic fragrance ingredient is a complex cyclic compound used in modern perfumery to create woody-ambery accords. You’ll encounter it in niche and designer fragrances where it contributes depth and longevity. Its importance lies in providing a sustainable alternative to certain natural materials while offering perfumers precise control over scent profiles.
Safety Profile
USE WITH AWARENESSWhat Does 3-Cyclohexene-1-methanol, 3(or 4)-methyl-1-(2,2,3-trimethyl-3-cyclopenten-1-yl)-, acid-isomerized Smell Like?
A sophisticated woody-amber molecule with a multifaceted character. Opens with crisp, almost metallic top notes reminiscent of freshly cut cedar planks, evolving into a heart of warm, slightly sweet amber with hints of dry tobacco. The dry-down reveals a velvety muskiness that lingers close to the skin, behaving like a molecular accord itself – simultaneously clean and animalic, bright yet profound.
Chemistry, Properties & Perfumer Guide
The Chemistry
This bicyclic tertiary alcohol belongs to the family of modified terpenoids, created through acid-catalyzed isomerization of precursor molecules. The synthesis involves careful control of reaction conditions to achieve the desired stereochemistry. While not found in nature, its structure mimics certain aspects of degraded sesquiterpenes found in precious woods and ambers.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Odor Threshold | 0.01 ppm (estimated) |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | Base note modifier |
| Functional Fragrance | 0.5-1% | Up to 2% | Fabric conditioner bases |
Classic Accords
Tip: Use as a bridge between fresh top notes and deep base materials – it helps prevent sharp transitions.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted under IFRA standards
RIFM Assessment
Under evaluation by RIFM as of 2023
Sustainability
As a synthetic material, this ingredient avoids harvesting pressure on natural resources. Its production can be optimized for minimal waste, though energy inputs for synthesis should be considered. Being highly potent, it requires smaller quantities in formulations compared to some natural alternatives.
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Ingredient Data Sheet
CAS 426218-78-2Physical 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.
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