Table 2.
Physicochemical properties of esters.
| Compound | Aromatic Descriptor 1 | Abbreviation | Water Solubility 2 (g/L) | Log P 3 | Vapor Pressure 2 (mm Hg) | Concentration (μg/L) |
|---|---|---|---|---|---|---|
| Propyl acetate [39,40] | Celery, floral, pear | C2C3 | 10.670 | +1.26 | 35.1 | 500 |
| Ethyl isobutyrate [39,41] | Kiwi, strawberry, solvent | 2MeC3C2 | 3.172 | +1.67 | 24.2 | 400 |
| Ethyl butyrate [39,40] | Apple, butter, cheese | C4C2 | 2.745 | +1.68 | 14.6 | 400 |
| Butyl acetate [39] | Apple, banana | C2C4 | 3.128 | +1.82 | 11.9 | 400 |
| Ethyl isovalerate [41] | Apple, fruit, pineapple | 3MeC4C2 | 1.070 | +1.9 | 7.98 | 500 |
| Ethyl valerate [39] | Apple, dry fish, herb | C5C2 | 0.926 | +2.19 | 4.8 | 500 |
1 Aromatic descriptor from the Flavor Ingredient Library (www.femaflavor.com, accessed on 20 April 2022). 2 Vapor pressure (at 25 °C) and water solubility (at 25 °C): from EPI suit 4.1 calculation. 3 Log P obtained from online Molinspiration cheminformatics services (www.molinspiration.com, accessed on 3 January 2022).