3-(p-Isopropylphenyl)propionaldehyde (CAS 7775-00-0) — Sweet Top to Middle Note Fragrance Ingredient
3-(p-Isopropylphenyl)propionaldehyde
CAS 7775-00-0
What Is 3-(p-Isopropylphenyl)propionaldehyde?
3-(p-Isopropylphenyl)propionaldehyde is a synthetic fragrance ingredient used in perfumes and scented products. It’s found in fine fragrances, body care items, and household cleaners. This aldehyde contributes a unique aromatic profile that enhances modern scent compositions.
Safety Profile
USE WITH AWARENESSWhat Does 3-(p-Isopropylphenyl)propionaldehyde Smell Like?
This synthetic aldehyde presents a complex aromatic character with a crisp, clean opening reminiscent of fresh linen and citrus peel. The heart reveals subtle floral undertones with a whisper of spice, while the dry-down offers a soft woody-musky foundation. It behaves like a chameleon in compositions – amplifying florals in top notes while providing staying power through its tenacious base character.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used as a modern aldehyde booster, adding crispness to the legendary floral bouquet while enhancing the fragrance’s diffusion and longevity.
Provides the clean, freshly-laundered effect that defines this classic, working in harmony with other aldehydes to create its signature brightness.
2D Molecular Structure
SMILES: CC(C)C1=CC=C(CCC=O)C=C1
Chemistry, Properties & Perfumer Guide
The Chemistry
3-(p-Isopropylphenyl)propionaldehyde belongs to the aromatic aldehyde class, synthesized through Friedel-Crafts acylation followed by reduction. The isopropyl group at the para position contributes to its unique steric and electronic properties, influencing both odor characteristics and chemical stability. Modern production typically involves catalytic hydrogenation of the corresponding cinnamaldehyde derivative.
Physical & Chemical Properties
| Boiling Point | Not available |
|---|---|
| Density | Not available |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Used as a modifier and diffuser |
| Functional Fragrances | 0.1-0.5% | Up to 1% | Adds freshness to cleaning products |
Classic Accords
Tip: Use in trace amounts to brighten floral compositions without overwhelming delicate top notes.
Alternatives & Comparisons
When a more floral, lily-of-the-valley character is desired with similar chemical stability.
For a more marine, ozonic effect while maintaining good blending properties with florals.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No specific IFRA restrictions noted under current guidelines (Amendment 49).
RIFM Assessment
Not currently listed in RIFM’s priority assessment program.
Sustainability
As a synthetic material, production can be optimized for minimal environmental impact through green chemistry principles. Being petroleum-derived, responsible sourcing of feedstocks remains important for long-term sustainability.
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Physicochemical Properties
DTXSID: DTXSID6074883
Physical Properties
| Molecular Weight | 176.259 g/mol🔬 EPA CompTox |
| Density | 0.966 g/cm^3🔬 EPA CTX |
| Boiling Point | 256.5 °C🔬 EPA CTX |
| Melting Point | 8.82 °C📊 OPERA |
| Flash Point | 104 °C🔬 EPA CTX |
| Refractive Index | 1.501 Dimensionless📊 OPERA |
| Molar Volume | 186.148 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 3.435 Log10 unitless🔬 EPA CTX |
| LogD (pH 5.5) | 3.112 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 3.112 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 5.96 Log10 unitless📊 OPERA |
| Water Solubility | 0 mol/L🔬 EPA CTX |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.006 mmHg🔬 EPA CTX |
| Viscosity | 4.13 cP📊 OPERA |
| Surface Tension | 33.422 dyn/cm📊 OPERA |
| Thermal Conductivity | 135.325 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 17.07 Ų💻 Computed |
| H-Bond Donors | 0 count💻 Computed |
| H-Bond Acceptors | 1 count💻 Computed |
| Rotatable Bonds | 4 count💻 Computed |
| Aromatic Rings | 1 count💻 Computed |
| Molar Refractivity | 54.807 cm^3/mol📊 OPERA |
| Polarizability | 21.727 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.
