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| Volatile Fatty Acid | Boiling Point (°C) | Solubility (g/dm3) | CODequivalent (g COD/g) | Vapor Pressure (mm Hg) | Smell |
|---|---|---|---|---|---|
| Acetic acid | 117 | Complete | 1.066 | 20.9 | Sharp smell of vinegar |
| Propionic acid | 141 | Complete | 1.512 | 3.3 | Sharp, rancid, acrid |
| Butyric acid | 164 | Complete | 1.816 | 1.65 | Rancid butter, sweat |
| Isovaleric acid | 177 | 20 | 2.037 | 1 | Rancid fat, blue cheese |
| Valeric acid | 186 | 40 | 2.037 | 1 | Sweat, valerian |
| Caproic acid | 206 | 11 | 2.204 | 0.2 | Sharp, sour |
