3,4,4a,5,8,8a-Hexahydro-3′,7-dimethylspiro[1,4-methanonaphthalene-2(1H),2′-oxirane] (CAS 41816-03-09) — Woody Middle Note Fragrance Ingredient
3,4,4a,5,8,8a-Hexahydro-3',7-dimethylspiro[1,4-methanonaphthalene-2(1H),2'-oxirane]
CAS 41816-03-09
What Is 3,4,4a,5,8,8a-Hexahydro-3',7-dimethylspiro[1,4-methanonaphthalene-2(1H),2'-oxirane]?
This synthetic fragrance compound is a niche ingredient primarily encountered in modern perfumery. Its complex chemical structure creates unique olfactory effects that perfumers use to craft avant-garde scents. While not found in nature, it’s valued for its ability to add depth and intrigue to contemporary fragrance compositions.
Safety Profile
USE WITH AWARENESSWhat Does 3,4,4a,5,8,8a-Hexahydro-3',7-dimethylspiro[1,4-methanonaphthalene-2(1H),2'-oxirane] Smell Like?
This synthetic molecule presents a challenging yet fascinating olfactory profile. Upon application, it reveals a sharp, almost medicinal character with subtle woody-herbaceous undertones. As it evolves, the scent develops into a complex interplay of dry, earthy notes with faint camphoraceous aspects. The dry-down leaves a lingering impression of clean, slightly metallic woody nuances that persist with remarkable tenacity.
Chemistry, Properties & Perfumer Guide
The Chemistry
This bicyclic epoxide belongs to the class of strained polycyclic hydrocarbons. The molecule features a unique spiro structure combining a hexahydronaphthalene core with an epoxide ring. Synthesis typically involves multi-step organic reactions including Diels-Alder cycloadditions followed by epoxidation. The strained geometry contributes to its distinctive olfactory characteristics and relatively high reactivity compared to more stable fragrance compounds.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-0.5% | Up to 1% | Used as a special effect |
| Functional Fragrance | 0.01-0.1% | Up to 0.3% | Limited applications |
Classic Accords
Tip: Use in trace amounts with complementary woody materials to tame its sharp edges.
Alternatives & Comparisons
A more stable woody-amber alternative with similar structural complexity but better blending properties.
Provides comparable woody effects with greater versatility and lower cost.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA standards, but usage is limited due to insufficient toxicological data.
RIFM Assessment
No RIFM safety assessment available for this specific compound.
Sustainability
As a fully synthetic material, this compound avoids natural resource depletion but requires energy-intensive manufacturing processes. Its complex synthesis may involve hazardous intermediates, requiring careful waste management. Future green chemistry approaches could potentially improve its environmental profile.
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