1-Methoxy-7,9-dimethyl-2-oxaspiro[5.5]undec-8-ene (CAS 1253785-23-7) — Woody Middle to Base Note Fragrance Ingredient
1-Methoxy-7,9-dimethyl-2-oxaspiro[5.5]undec-8-ene
CAS 1253785-23-7
What Is 1-Methoxy-7,9-dimethyl-2-oxaspiro[5.5]undec-8-ene?
1-Methoxy-7,9-dimethyl-2-oxaspiro[5.5]undec-8-ene is a synthetic fragrance ingredient used in modern perfumery to create unique, long-lasting scents. You’ll find it in niche and avant-garde fragrances. This compound matters because it offers perfumers a novel way to build complexity and longevity in fragrance compositions, especially in woody or amber accords.
Safety Profile
GENERALLY SAFEWhat Does 1-Methoxy-7,9-dimethyl-2-oxaspiro[5.5]undec-8-ene Smell Like?
This synthetic molecule offers a complex olfactory profile. Initially, it presents a sharp, almost metallic edge that quickly evolves into a warm, woody-spicy heart. The dry-down reveals a subtle ambery sweetness with a lingering ozonic freshness, reminiscent of aged cedarwood meeting modern synthetic musks. Its spiro structure contributes to an unusual diffusion pattern that seems to oscillate between transparency and density.
Chemistry, Properties & Perfumer Guide
The Chemistry
1-Methoxy-7,9-dimethyl-2-oxaspiro[5.5]undec-8-ene belongs to the spirocyclic ether class of fragrance ingredients. Its unique structure combines a bridged bicyclic system with an oxygen-containing heterocycle. The molecule is typically synthesized through acid-catalyzed cyclization of appropriate terpene precursors, followed by selective oxidation and methylation. The spiro center creates interesting stereochemical properties that influence both its odor characteristics and stability in formulations.
Physical & Chemical Properties
| Boiling Point | Not available |
|---|---|
| Density | Not available |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | Used for unique woody-amber effects |
| Functional Fragrances | 0.5-1% | Up to 2% | Adds sophistication to cleaning products |
Classic Accords
Tip: Use in conjunction with other woody materials to enhance diffusion and longevity.
Alternatives & Comparisons
Offers similar spirocyclic structure with more pronounced woody notes.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No specific IFRA restrictions. General guidelines for synthetic ingredients apply.
RIFM Assessment
No published RIFM assessment available.
Sustainability
As a synthetic material, this compound is produced through controlled chemical processes with minimal environmental impact compared to some natural alternatives. Its efficient use in formulations contributes to sustainable fragrance design by requiring smaller quantities to achieve desired effects compared to traditional materials.
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