2-Methyl-4(2,2,3-trimethyl-3-cyclopentenyl)butanol (CAS 72089-08-08) — Woody Middle to Base Note Fragrance Ingredient
2-Methyl-4(2,2,3-trimethyl-3-cyclopentenyl)butanol
CAS 72089-08-08
What Is 2-Methyl-4(2,2,3-trimethyl-3-cyclopentenyl)butanol?
2-Methyl-4(2,2,3-trimethyl-3-cyclopentenyl)butanol is a synthetic fragrance ingredient used in perfumery for its woody, amber-like character. It’s found in many modern woody and oriental fragrances. This molecule helps create depth and longevity in perfumes, acting as a versatile building block that bridges fresh top notes with rich base notes.
Safety Profile
GENERALLY SAFEWhat Does 2-Methyl-4(2,2,3-trimethyl-3-cyclopentenyl)butanol Smell Like?
This synthetic amberwood molecule opens with crisp woody facets reminiscent of freshly split cedar, gradually revealing a warm, slightly sweet amber character. The dry-down develops into a smooth, musky-woody foundation with excellent tenacity. It behaves like a molecular bridge between traditional sandalwood materials and modern amberwood bases.
Chemistry, Properties & Perfumer Guide
The Chemistry
2-Methyl-4(2,2,3-trimethyl-3-cyclopentenyl)butanol belongs to the family of synthetic woody-amber molecules derived from modified terpene structures. While not found in nature, its molecular framework mimics certain aspects of natural sandalwood and amber components. The synthesis typically involves cyclization of terpene precursors followed by selective hydrogenation and functionalization to achieve the desired olfactory profile.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-5% | Up to 10% | Woody-amber base |
| Functional Fragrance | 0.5-2% | Up to 5% | Fabric conditioner bases |
Classic Accords
Tip: Use as a bridge between citrus top notes and deep woody bases to improve fragrance diffusion.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA standards.
RIFM Assessment
No formal RIFM assessment published as of 2023.
Sustainability
As a synthetic material, this ingredient avoids natural resource depletion concerns. Its production typically involves petrochemical feedstocks, though modern synthesis routes aim for atom efficiency. The environmental impact is comparable to other fragrance synthetics in its class.
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