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(R)-4-Propyldihydrofuran-2(3H)-one
1. Basic Information
Name: (R)-4-Propyldihydrofuran-2(3H)-one
CAS No.: 63095-51-2
Molecular Formula: C7H12O2
Molecular Weight: 128.17
2. Physical and Chemical Properties
Physical Properties
- Appearance: Colorless transparent oily liquid
- Odor: Mild creamy, coconut and lactone fragrance
- Solubility: Soluble in CH3OH, C2H5OH, acetone, edible oils; slightly soluble in hot H2O; insoluble in aliphatic alkanes
- Boiling Point: 210–215 °C
- Hygroscopicity: Non-hygroscopic under normal humidity
- Aqueous Characteristic: Neutral chiral lactone, weak ester aroma in aqueous dilution
Chemical Properties
- Molecular Structure: Chiral five-membered γ-lactone ring with n-propyl substituent at the 4-position, R configuration chiral carbon
- Lactone Hydrolysis: Stable under neutral and weak acidic conditions; hydrolyzes into corresponding hydroxycarboxylic acid under strong alkaline heating
- Oxidation Stability: Slightly yellowed after long-term exposure to air and ultraviolet light
- Thermal Stability: Stable within conventional flavor processing temperature range below 150 °C
- Photostability: Moderately sensitive to UV light; prolonged illumination generates trace oxidation impurities
- Compatibility: Good miscibility with most edible flavors, solvents and cosmetic oil phases; incompatible with concentrated strong alkali and strong oxidants
3. Main Application Fields
1. Edible Synthetic Fragrance (Core Application)
Coconut, cream, dairy flavor modifier for beverages, baked goods, candy and dairy products
2. Daily Fragrance Raw Material
Creamy aroma additive for perfume, body lotion and shampoo formulas
3. Chiral Organic Synthetic Intermediate
Chiral building block for synthesizing pharmaceutical intermediates and fine chiral compounds
4. GC Reference Standard
Chiral reference substance for lactone flavor component detection
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 63095-51-2 |
| Molecular Formula | C7H12O2 |
| Appearance | Colorless oily liquid |
| GC Purity | Fragrance Grade ≥99.0% |
| Enantiomeric Excess (ee) | ≥98.0% |
| Water Content (KF) | ≤0.10% |
| Color (APHA) | ≤30 |
| Residue on Ignition | ≤0.10% |
| Heavy Metals (Pb1) | Food Grade ≤10 ppm |
| Packaging | Amber lined 200L iron drum / IBC tank |
| Storage Condition | Hermetically sealed in cool dark warehouse below 25 °C; isolate from light, oxidants and alkaline substances |
| Transportation Requirement | Low-volatility chiral lactone liquid, sealed packaging away from open flame |
| Shelf Life | 24 months under fully sealed packaging |
Safety Warning
Mild irritant lactone liquid. Vapor irritates eyes and respiratory tract; prolonged skin contact may cause slight redness. Wear chemical-resistant gloves and protective goggles with sufficient ventilation during operation. Store separately from fire and static electricity sources. Waste liquid belongs to flammable organic hazardous waste and needs centralized solvent recovery disposal.
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