3,7-Dimethyloct-6-en-3-ol (CAS 18479-51-1) — Citrus Top Note Fragrance Ingredient
3,7-Dimethyloct-6-en-3-ol
CAS 18479-51-1
What Is 3,7-Dimethyloct-6-en-3-ol?
3,7-Dimethyloct-6-en-3-ol is a synthetic fragrance ingredient often used in perfumes and scented products. It contributes to fresh, citrusy, and slightly woody notes. This ingredient matters because it enhances the complexity and longevity of fragrances, making scents more dynamic and appealing.
Safety Profile
GENERALLY SAFEWhat Does 3,7-Dimethyloct-6-en-3-ol Smell Like?
3,7-Dimethyloct-6-en-3-ol opens with a bright, citrusy burst reminiscent of freshly peeled oranges. As it settles, it reveals a subtle woody undertone, like sun-warmed cedar. The dry-down is clean and slightly floral, evoking a breezy summer day. Its evolution is smooth, making it a versatile choice for fresh and woody accords.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used to enhance the citrus top notes, adding brightness and longevity to the fragrance.
2D Molecular Structure
SMILES: CCC(C)(O)CCC=C(C)C
Chemistry, Properties & Perfumer Guide
The Chemistry
3,7-Dimethyloct-6-en-3-ol is a monoterpenoid alcohol. It is synthetically produced, often via the hydration of myrcene or other terpene precursors. Its molecular structure contributes to its fresh, citrusy scent profile. The compound is chiral, with enantiomers potentially differing in odor characteristics.
Physical & Chemical Properties
| Boiling Point | 198 °C |
|---|---|
| Density | 0.865 g/cm³ |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 3-8% | Up to 15% | Versatile top note modifier |
Classic Accords
Tip: Use in small amounts to enhance citrus top notes without overpowering the blend.
Alternatives & Comparisons
A naturally occurring terpene alcohol with similar citrusy notes but more floral undertones.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions currently apply.
EU Allergen Declaration
Not listed as an EU allergen.
RIFM Assessment
RIFM safety assessment pending.
Sustainability
Synthetic production ensures consistent quality and reduces reliance on natural resources. Environmental impact is minimized through controlled manufacturing processes.
Explore 3,7-Dimethyloct-6-en-3-ol
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References
- PubChem. 3,7-Dimethyloct-6-en-3-ol. PubChem
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorPhysicochemical Properties
DTXSID: DTXSID1044809
Physical Properties
| Molecular Weight | 156.269 g/mol🔬 EPA CompTox |
| Density | 0.853 g/cm^3🔬 EPA CTX |
| Boiling Point | 202.89 °C🔬 EPA CTX |
| Melting Point | -13.71 °C📊 OPERA |
| Flash Point | 86 °C🔬 EPA CTX |
| Refractive Index | 1.452 Dimensionless📊 OPERA |
| Molar Volume | 184.573 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 2.9 Log10 unitless🔬 EPA CTX |
| LogD (pH 5.5) | 3.262 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 3.262 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 6.75 Log10 unitless📊 OPERA |
| Water Solubility | 0.004 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.053 mmHg🔬 EPA CTX |
| Viscosity | 4.449 cP📊 OPERA |
| Surface Tension | 26.814 dyn/cm📊 OPERA |
| Thermal Conductivity | 133.844 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 | 4 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 49.779 cm^3/mol📊 OPERA |
| Polarizability | 19.734 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.
