3,5-Dimethylcyclohexene-1-methanol (CAS 67634-16-6) — Woody Middle Note Fragrance Ingredient
3,5-Dimethylcyclohexene-1-methanol
CAS 67634-16-6
What Is 3,5-Dimethylcyclohexene-1-methanol?
3,5-Dimethylcyclohexene-1-methanol is a synthetic fragrance ingredient used in modern perfumery. It contributes fresh, woody, and slightly floral nuances to fragrances. You’ll encounter it in contemporary designer scents and niche perfumes where it adds modern character. This molecule matters because it represents how synthetic chemistry expands perfumers’ palettes beyond natural materials, allowing creation of novel scent profiles impossible to achieve with traditional ingredients alone.
Safety Profile
GENERALLY SAFEWhat Does 3,5-Dimethylcyclohexene-1-methanol Smell Like?
3,5-Dimethylcyclohexene-1-methanol presents a crisp, modern woody character with subtle floral undertones. Imagine freshly sanded cedar planks dusted with lily-of-the-valley petals – clean yet complex. The opening is bright and slightly camphoraceous, evolving into a heart of smooth, rounded woodiness. As it dries down, it reveals a faintly musky base reminiscent of sun-warmed driftwood. The overall effect is transparent yet persistent, making it excellent for adding structural backbone without heaviness in contemporary compositions.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used here to create an ultra-modern green woody effect, contrasting with natural galbanum and lily-of-the-valley notes.
Provides the dry, driftwood-like woody foundation that complements the marine and herbal elements.
2D Molecular Structure
SMILES: CC1CC(CO)CC(C)=C1
Chemistry, Properties & Perfumer Guide
The Chemistry
3,5-Dimethylcyclohexene-1-methanol belongs to the cyclohexene methanol class of fragrance compounds. While not found in nature, its structure shares similarities with terpene alcohols. Synthesis typically involves catalytic hydrogenation of aromatic precursors followed by selective oxidation. The molecule’s stereochemistry impacts its odor profile, with different isomers exhibiting varying intensity and character.
Physical & Chemical Properties
| Boiling Point | Not available |
|---|---|
| Density | Not available |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | Modern woody modifier |
| Functional Fragrance | 0.5-1.5% | Up to 2% | Clean woody note |
Classic Accords
Tip: Use to add contemporary woody character without heaviness in fresh or floral compositions.
Alternatives & Comparisons
Offers similar woody character but with more pronounced cedar-like qualities and better longevity.
Provides woody-ambery depth when more substantial base support is needed.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions currently apply to this material.
RIFM Assessment
Currently under evaluation by RIFM.
Sustainability
As a synthetic material, 3,5-Dimethylcyclohexene-1-methanol offers consistent quality without natural resource depletion. Its production can be optimized for minimal environmental impact through green chemistry principles. Being petroleum-derived, its sustainability depends on the manufacturer’s energy sources and waste management practices.
Explore 3,5-Dimethylcyclohexene-1-methanol
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References
- Bauer et al. (2001). Modern Synthetic Fragrance Chemistry. Wiley-VCH.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 67634-16-6Physical Properties
| Molecular Weight | 140.22 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 1.6🔬 PubChem |
| Boiling Point | 218 °C🔬 EPA CompTox |
| Vapor Pressure | 0.0295 mmHg @ 25°C📊 OPERA |
| Flash Point | 75.8 °C🔬 EPA CompTox |
| Involatility Index | 0.0027💻 Calculated |
| log Kp (skin permeability) | -2.419💻 Calculated |
| SMILES | CC1CC(CC(=C1)C)CO🔬 PubChem |
Volatility & Performance
| Fragrance Note | Heart💻 Calculated |
| Volatility Class | Very slow💻 Calculated |
| Persistence Score | 2.1 / 5💻 Calculated |
Odor & Flavor
| Primary Descriptors | floralwoody• leffingwell |
| Functional Groups | alcoholalkene💻 RDKit |
Physical 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.
Physicochemical Properties
DTXSID: DTXSID00867296
Physical Properties
| Molecular Weight | 140.226 g/mol🔬 EPA CompTox |
| Density | 0.907 g/cm^3📊 OPERA |
| Boiling Point | 208.52 °C📊 OPERA |
| Melting Point | 16.773 °C📊 OPERA |
| Flash Point | 78.358 °C📊 OPERA |
| Refractive Index | 1.461 Dimensionless📊 OPERA |
| Molar Volume | 156.294 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 2.783 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 2.783 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 2.783 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 6.35 Log10 unitless📊 OPERA |
| Water Solubility | 0.029 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.077 mmHg📊 OPERA |
| Viscosity | 7.202 cP📊 OPERA |
| Surface Tension | 28.285 dyn/cm📊 OPERA |
| Thermal Conductivity | 135.803 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 20.23 Ų💻 Computed |
| H-Bond Donors | 1 count💻 Computed |
| H-Bond Acceptors | 1 count💻 Computed |
| Rotatable Bonds | 1 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 42.915 cm^3/mol📊 OPERA |
| Polarizability | 17.013 Å^3📊 OPERA |
Data Sources:
🔬 EPA Experimental data from U.S. EPA CompTox Chemicals Dashboard & CTX APIs. 📊 OPERA Predicted using EPA's OPERA QSAR models. 💻 Computed Calculated from SMILES using RDKit.
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