1,1,3-Trimethyl-3-phenylindane (CAS 3910-35-8) — Woody Base Note Fragrance Ingredient
1,1,3-Trimethyl-3-phenylindane
CAS 3910-35-8
What Is 1,1,3-Trimethyl-3-phenylindane?
1,1,3-Trimethyl-3-phenylindane is a synthetic fragrance ingredient used to enhance longevity and add woody-ambery nuances to perfumes. Found in many modern fragrances, it helps create diffusive, long-lasting scent profiles. This versatile material is prized for its ability to blend seamlessly with other ingredients while providing structural support to fragrance compositions.
Safety Profile
GENERALLY SAFEWhat Does 1,1,3-Trimethyl-3-phenylindane Smell Like?
1,1,3-Trimethyl-3-phenylindane presents a complex olfactory profile that evolves beautifully on skin. Initially, it offers a crisp, slightly metallic sharpness reminiscent of crushed pine needles. This quickly softens into a warm, ambery heart with subtle powdery facets like vintage perfume sachets. The dry-down reveals remarkable tenacity – a velvety woody-musk foundation that lingers for hours, with faint whispers of sun-warmed cedarwood and antique leather.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used to amplify the woody-amber backbone, contributing to Sauvage’s signature trail and modern freshness.
Provides subtle woody support to the saffron-amber accord, enhancing diffusion without overpowering the delicate balance.
2D Molecular Structure
SMILES: CC1(C)CC(C)(C2=C1C=CC=C2)C1=CC=CC=C1
Chemistry, Properties & Perfumer Guide
The Chemistry
1,1,3-Trimethyl-3-phenylindane belongs to the indane class of synthetic aromatic compounds. Its structure features a phenyl group attached to an indane core with three methyl substitutions. The molecule’s conformational rigidity contributes to its excellent stability in formulations. Industrially produced through Friedel-Crafts alkylation reactions, this material showcases how subtle structural modifications can dramatically alter scent properties in fragrance chemistry.
Physical & Chemical Properties
| Molecular Weight | 210.32 g/mol |
|---|---|
| Boiling Point | Estimated 300-310°C |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 2-5% | Up to 10% | Provides woody-amber foundation |
| Functional Fragrance | 0.5-2% | Up to 3% | Used for longevity enhancement |
Classic Accords
Tip: Use to extend citrus top notes by creating a bridge to woody base materials.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA. Monitor for future amendments.
RIFM Assessment
Under review by RIFM for comprehensive safety assessment.
Sustainability
As a synthetic material, 1,1,3-Trimethyl-3-phenylindane offers consistent quality without natural variation. Production follows green chemistry principles to minimize environmental impact. The long-lasting nature reduces reapplication frequency in end products, contributing to sustainable fragrance use.
Explore 1,1,3-Trimethyl-3-phenylindane
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References
- PubChem Compound Summary for 1,1,3-Trimethyl-3-phenylindane PubChem
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorPhysicochemical Properties
DTXSID: DTXSID20863290
Physical Properties
| Molecular Weight | 236.358 g/mol🔬 EPA CompTox |
| Density | 0.975 g/cm^3📊 OPERA |
| Boiling Point | 308.5 °C🔬 EPA CTX |
| Melting Point | 51.25 °C🔬 EPA CTX |
| Flash Point | 144.931 °C📊 OPERA |
| Refractive Index | 1.554 Dimensionless📊 OPERA |
| Molar Volume | 239.545 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 5.869 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 5.869 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 5.869 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 8.41 Log10 unitless📊 OPERA |
| Water Solubility | 0 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.001 mmHg📊 OPERA |
| Viscosity | 16.357 cP📊 OPERA |
| Surface Tension | 37.717 dyn/cm📊 OPERA |
| Thermal Conductivity | 123.003 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 0 Ų💻 Computed |
| H-Bond Donors | 0 count💻 Computed |
| H-Bond Acceptors | 0 count💻 Computed |
| Rotatable Bonds | 1 count💻 Computed |
| Aromatic Rings | 2 count💻 Computed |
| Molar Refractivity | 76.806 cm^3/mol📊 OPERA |
| Polarizability | 30.448 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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