Propionic Acid
Ethylformic Acid, Methylacetic Acid, Propanoic Acid
- CAS
- 79-09-4
- EC
- 201-176-3
- Food Code
- E280
- Sectors
- Food & Nutrition, Animal Nutrition, Agriculture
Propionic Acid (CAS 79-09-4) is a short-chain carboxylic acid that appears as a colorless liquid with a sharp, rancid odor, used as a preservative in animal feed and bakery products and as an intermediate for cellulose acetate propionate, herbicides and plasticizers. It is miscible with water and alcohol.
Typical Properties
| Molecular formula | C3H6O2 |
|---|---|
| Molecular weight | 74.08 g/mol |
| Appearance | Propionic acid is a colorless liquid. Sharp, rancid odor. The Odor Threshold is 0.16 ppm. |
| Form | Liquid |
| Color | ≤10, APHA: |
| Odor | at 0.10 % in propylene glycol. pungent acidic cheesy vinegar |
| Melting point | -20.7 °C |
| Boiling point | 141.1 °C |
| Density | 0.9930 g/cm³ @ Temp: 20 °C |
| Water solubility | 37 g/100 mL |
| Flash point | 125 °F |
| pH | 2.5 (100g/l, H2O, 20°C) |
| GHS signal word | Danger · Flammable, Corrosive, Acute toxicity, Irritant / harmful |
| HS code | 29155000 |
| Grades available | Food Grade, Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Propionic Acid
Applications
Used as a preservative in animal feed and bakery products. In industry, it serves as an intermediate for cellulose acetate propionate, herbicides, and plasticizers.
Safety & Risks
Corrosive; avoid contact with skin and eyes. Handle in ventilated areas.
Packaging
Supplied in 200 kg HDPE drums or IBC tanks. Store in a cool, dry, and sealed environment.