Indeno[4,3a-b]furan,decahydro-2,2,7,7,8,9,9-heptamethyl- (CAS 647828-16-8) — Woody Base Note Fragrance Ingredient
Indeno[4,3a-b]furan,decahydro-2,2,7,7,8,9,9-heptamethyl-
CAS 647828-16-8
What Is Indeno[4,3a-b]furan,decahydro-2,2,7,7,8,9,9-heptamethyl-?
Indeno[4,3a-b]furan is a synthetic fragrance compound used in modern perfumery to create unique woody-amber accords. You’ll encounter it in niche fragrances where perfumers push creative boundaries. This ingredient matters because it represents how synthetic chemistry expands the perfumer’s palette beyond natural materials, allowing for novel scent experiences impossible with traditional ingredients alone.
Safety Profile
USE WITH AWARENESSWhat Does Indeno[4,3a-b]furan,decahydro-2,2,7,7,8,9,9-heptamethyl- Smell Like?
This synthetic molecule delivers a powerful woody-ambergris character with facets of dry cedar, warm musk, and a subtle metallic edge. The opening presents a clean, almost mineralic quality that evolves into a velvety amber-woody heart. Dry-down reveals exceptional tenacity with a smooth, slightly sweet woody base reminiscent of aged sandalwood crossed with ambroxan. Its diffusive power makes it ideal for modern amber accords.
Chemistry, Properties & Perfumer Guide
The Chemistry
Indeno[4,3a-b]furan derivatives belong to the polycyclic furan class, synthesized through Diels-Alder reactions of appropriate dienes and dienophiles. The heptamethyl substitution pattern creates exceptional stability and odor potency. While not found in nature, its structure mimics certain woody-amber molecules found in natural ambergris. The rigid polycyclic framework contributes to its excellent longevity in fragrance applications.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Odor Strength | Very high |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Powerful woody-amber base |
| Functional Fragrance | 0.1-0.5% | Up to 1% | Long-lasting woody note |
Classic Accords
Tip: Use sparingly in woody oriental bases where its powerful diffusion can be balanced by softer materials.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No current IFRA restrictions. Listed on IFRA Transparency List.
RIFM Assessment
Under evaluation by RIFM. Preliminary data suggests safe use at current industry levels.
Sustainability
As a synthetic material, this ingredient doesn’t rely on natural resource extraction. Its production follows standard petrochemical synthesis routes with typical environmental controls. The high potency reduces required quantities compared to natural alternatives.
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