Cyclopentanol, 2-cyclopentylidene- (CAS 6261-30-9) — Woody Middle Note Fragrance Ingredient
Cyclopentanol, 2-cyclopentylidene-
CAS 6261-30-9
What Is Cyclopentanol, 2-cyclopentylidene-?
Cyclopentanol, 2-cyclopentylidene- is a synthetic fragrance ingredient used to add woody, earthy notes to perfumes. It’s found in niche fragrances and some household products. This molecule matters because it can mimic natural woody scents without relying on plant extracts, making fragrances more sustainable.
Safety Profile
GENERALLY SAFEWhat Does Cyclopentanol, 2-cyclopentylidene- Smell Like?
A crisp, woody aroma with earthy undertones, reminiscent of freshly cut cedar planks. Opens with a sharp, almost metallic edge that quickly mellows into a dry, papery heart. The dry-down reveals subtle leathery nuances, like an old book binding. Lingers close to the skin with a clean, slightly musky finish.
Chemistry, Properties & Perfumer Guide
The Chemistry
Cyclopentanol derivatives belong to the cyclopentanoid class of compounds. While not found in nature, this synthetic molecule mimics structural elements of natural woody odorants. Typically synthesized through Grignard reactions or catalytic hydrogenation of cyclopentanone derivatives. The cyclopentylidene moiety contributes to its distinctive dry woody character.
Physical & Chemical Properties
| Molecular Weight | Not available |
|---|---|
| Boiling Point | Not available |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | Woody accent note |
| Functional Fragrance | 0.5-1% | Up to 2% | Earthy base note |
Classic Accords
Tip: Use to add dryness to woody accords without overwhelming sweetness.
Alternatives & Comparisons
Natural alternative with similar woody profile but higher cost and lower stability.
Synthetic alternative with enhanced longevity and smoother dry-down.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA.
RIFM Assessment
No RIFM safety assessment found for this specific compound.
Sustainability
As a synthetic ingredient, production doesn’t rely on plant harvesting. However, synthesis may involve petrochemical feedstocks. Green chemistry approaches could improve environmental profile.
Explore Cyclopentanol, 2-cyclopentylidene-
Browse essential oils and aroma compounds.
Browse on iHerb →Affiliate disclosure: we may earn a small commission at no extra cost to you.
References
- PubChem Compound Summary for Cyclopentanol derivatives PubChem
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data error
