4H-4a,9-Methanoazuleno[5,6-d]-1,3-dioxole, octahydro-2,5,8,8,9a-pentamethyl-2-propyl-, (3aS,4aR,5R,7aS,9R,9aR)- (CAS 1357064-95-9) — Woody Base Note Fragrance Ingredient
4H-_4a,_9-_Methanoazuleno[5,_6-_d]_-_1,_3-_dioxole, octahydro-_2,_5,_8,_8,_9a-_pentamethyl-_2-_propyl-_, (3aS,_4aR,_5R,_7aS,_9R,_9aR)_-
CAS 1357064-95-9
What Is 4H-_4a,_9-_Methanoazuleno[5,_6-_d]_-_1,_3-_dioxole, octahydro-_2,_5,_8,_8,_9a-_pentamethyl-_2-_propyl-_, (3aS,_4aR,_5R,_7aS,_9R,_9aR)_-?
This synthetic molecule is a rare ingredient in high-end perfumery, often used to add unique woody-amber nuances. It appears in niche fragrances where perfumers seek unconventional materials. Its complex structure allows it to bridge between fresh top notes and deep base accords, making it valuable for creating signature scents that stand apart from mainstream compositions.
Safety Profile
PROFESSIONAL USEWhat Does 4H-_4a,_9-_Methanoazuleno[5,_6-_d]_-_1,_3-_dioxole, octahydro-_2,_5,_8,_8,_9a-_pentamethyl-_2-_propyl-_, (3aS,_4aR,_5R,_7aS,_9R,_9aR)_- Smell Like?
A sophisticated interplay of dry woods and warm ambers with subtle camphoraceous undertones. The scent evolves from an initial crispness reminiscent of freshly split cedar, transitioning into a velvety, slightly sweet resinous character. In drydown, it leaves a lingering trail of clean musk-like warmth, behaving like a molecular bridge between traditional woody notes and modern synthetic ambers.
Chemistry, Properties & Perfumer Guide
The Chemistry
This complex bicyclic compound belongs to the azulene class, featuring a methanoazuleno-dioxole structure. Its synthesis typically involves multi-step cyclization reactions starting from guaiazulene derivatives. The specific stereochemistry (3aS,4aR,5R,7aS,9R,9aR) suggests a carefully controlled synthesis to produce this particular enantiomer, which likely contributes to its unique olfactory properties compared to other stereoisomers.
Physical & Chemical Properties
| Molecular Weight | Not publicly available |
|---|---|
| Complexity | High (600+) |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Niche Perfumery | 0.1-0.5% | Up to 1% | Used for signature accords |
| Functional Fragrances | Not used | N/A | Too expensive |
Classic Accords
Tip: Use sparingly to add depth to woody-amber bases without overwhelming other notes.
Alternatives & Comparisons
Natural azulene derivative with similar blue hue and woody character, but less amber warmth.
Synthetic alternative with comparable woody-amber properties but more pronounced diffusion.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently evaluated by IFRA. Use restricted to professional perfumery applications.
RIFM Assessment
No RIFM assessment available due to limited commercial use.
Sustainability
Being a synthetic material produced in small quantities, its environmental impact is minimal but energy-intensive in production. Future development may focus on more sustainable synthetic routes or bioengineered alternatives.
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Ingredient Data Sheet
CAS 1357064-95-9Physical 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.
