1. Basic Product Profile

• Full IUPAC Name: 4-propylbenzaldehyde
• Aliases: p-Propylbenzaldehyde, 4-n-Propylbenzaldehyde
• CAS Number: 28785-06-0
• EINECS: N/A
• Molecular Formula: C10H12O
• Molecular Weight: 148.20
• Chemical Classification: Aromatic aldehyde, flavor & fragrance intermediate, liquid crystal monomer raw material, fine chemical synthetic building block
• Core Advantages
  Para-propyl substituted benzaldehyde with clear floral-green, slight almond aromatic note. Contains reactive aromatic aldehyde group for condensation, reduction, oxidation reactions. Key raw material for synthetic fragrances, liquid crystal intermediates, pharmaceutical chiral synthesis and organic fine chemical production. Low freezing point, good solubility in organic solvents, stable under light-proof sealed storage.

2. Physical & Chemical Properties

2.1 Physical Index

1. Appearance: Colorless transparent oily liquid
2. Odor: Mild green floral, faint nutty almond aroma
3. Solubility: Insoluble in water; miscible with ethanol, methanol, acetone, ethyl acetate, benzene, essential oils
4. Boiling Point: 232–234 °C
5. Melting Point: ≤ -10 °C
6. Density (20℃): 0.980–0.986 g/cm3
7. Refractive Index nD20: 1.520–1.526
8. Hygroscopy: Non-hygroscopic
9. Volatility: Moderate volatility under room temperature

2.2 Chemical Properties

1. Functional group: Aromatic aldehyde -CHO at para position of n-propyl benzene ring
2. Aldehyde reactivity: Undergoes aldol condensation, Cannizzaro reaction, imine formation, oxidation to carboxylic acid, reduction to alcohol
3. Aromatic substitution: Benzene ring supports halogenation, nitration under mild catalytic conditions
4. Thermal Stability: Stable below 180℃; long-time high-temperature heating triggers slight polymerization
5. Acid & Alkali Stability: Stable in neutral & weak acid; prone to aldol polymerization under strong alkaline heating
6. Photostability: Gradually turns pale yellow under long-term UV/air exposure; must store light-proof
7. Compatibility: Compatible with most perfume solvents, organic synthesis solvents; incompatible with strong oxidants, concentrated strong alkali

3. Main Application Fields

3.1 Flavor & Fragrance Intermediate (Core Usage)

1. Precursor for floral, woody, herbal synthetic perfume compounds via condensation reactions;
2. Modifier for soap, detergent, candle and cosmetic fragrance formulas to add fresh green floral notes.

3.2 Liquid Crystal Material Raw Material

3.3 Pharmaceutical & Fine Chemical Synthesis

3.4 Laboratory Synthetic Reagent

4. Quality Specification Table