Propionic Acid has the molecular formula CH3CH2COOH, a CAS number of 79-09-4, and a molecular weight of 74. It is a carboxylic acid containing three carbon atoms and belongs to the short-chain saturated fatty acids. It is a colorless liquid with a pungent odor, a melting point of -20.8°C, a boiling point of 141°C, and a density of 0.9930 g/cm³ (at 20°C). Propionic acid is soluble in water, ethanol, ether, and neutral solvents.

Main Uses:Food Industry: Used as an esterification agent, solvent for cellulose, plasticizer, and food ingredient.

Pharmaceutical Industry: In the pharmaceutical industry, propionic acid has various applications, including serving as an intermediate for certain drugs.

Pesticide Industry: Propionic acid can be used to produce propionamide, which is further used to produce certain herbicides.

Fragrance Industry: Propionic acid is used to produce various fragrances, such as isoamyl propionate and linalyl propionate, which are used in food, soap, and cosmetics.

Plastics Industry: Propionic acid is used to produce cellulose acetate propionate (CAP), which is then used to make biodegradable plastics.