3a,4,5,6,7,7a-Hexahydro-2,6(or 3,6)-dimethyl-4,7-methano-1H-inden-5-ol (CAS 94248-21-2) — Woody Heart to base Note Fragrance Ingredient
3a,4,5,6,7,7a-Hexahydro-2,6(or 3,6)-dimethyl-4,7-methano-1H-inden-5-ol
CAS 94248-21-2
What Is 3a,4,5,6,7,7a-Hexahydro-2,6(or 3,6)-dimethyl-4,7-methano-1H-inden-5-ol?
3a,4,5,6,7,7a-Hexahydro-2,6(or 3,6)-dimethyl-4,7-methano-1H-inden-5-ol is a synthetic fragrance ingredient used in modern perfumery. It’s found in some niche and designer fragrances as a woody-amber note. This molecule helps create sophisticated, long-lasting scents by adding depth and complexity to fragrance compositions. It’s particularly valued for its ability to enhance woody and ambery accords without being overpowering.
Safety Profile
USE WITH AWARENESSWhat Does 3a,4,5,6,7,7a-Hexahydro-2,6(or 3,6)-dimethyl-4,7-methano-1H-inden-5-ol Smell Like?
This synthetic molecule offers a complex olfactory profile that evolves beautifully on skin. Initially presenting with crisp, almost camphoraceous woody tones, it quickly settles into a warm, slightly sweet amber character with subtle resinous undertones. The dry-down reveals a refined, velvety texture reminiscent of aged cedarwood with a whisper of musky powder. Its moderate volatility allows it to serve as both a heart and base note, bridging fresh top notes with deeper accords in sophisticated compositions.
Chemistry, Properties & Perfumer Guide
The Chemistry
This compound belongs to the bicyclic terpenoid alcohol class, structurally related to camphor and borneol. As a synthetic material, it’s typically produced through catalytic hydrogenation of suitable terpene precursors or Diels-Alder reactions. The multiple stereocenters in its structure suggest the existence of several stereoisomers, each potentially possessing different olfactory characteristics. The molecule’s rigid bicyclic framework contributes to its stability and persistence in fragrance formulations.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Used as woody-amber modifier |
| Body Care | 0.1-0.5% | Up to 1% | For warm, woody background |
| Home Fragrance | 0.2-1% | Up to 3% | In woody candle blends |
Classic Accords
Tip: Use in small quantities to add depth without overwhelming the composition.
Alternatives & Comparisons
When seeking a more transparent woody note with excellent blending properties.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No specific IFRA restrictions currently apply to this material.
RIFM Assessment
Not yet fully evaluated by RIFM. Limited safety data available.
Sustainability
As a synthetic material, this compound avoids natural resource depletion concerns. Its production can be optimized for atom economy and energy efficiency. The petrochemical origin raises some sustainability questions, but its potency means relatively small quantities are needed in formulations. Future green chemistry approaches may improve its environmental profile.
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Ingredient Data Sheet
CAS 94248-21-2Physical 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.
