Propionic Acid

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propionic acid

[¦prō·pē¦än·ik ′as·əd]
(organic chemistry)
CH3CH2COOH Water- and alcohol-soluble, clear, colorless liquid with pungent aroma; boils at 140.7°C; used to manufacture various propionates, in nickel-electroplating solutions, for perfume esters and artificial flavors, for pharmaceuticals, and as a cellulosics solvent. Also known as methylacetic acid; propanoic acid.

Propionic Acid


CH3CH2COOH, a monocarboxylic acid of the aliphatic series. It is a colorless liquid with a pungent odor and has a melting point of — 20.8°C, a boiling point of 140.8°C, and a density of 0.993 g/cm3 (20°C). It is soluble in water, alcohol, and ether.

Propionic acid is formed during the fermentation of carbohydrates by propionic acid bacteria and certain other bacteria. In industry it is obtained chiefly through the oxidation of paraffin hydrocarbons as a by-product in the preparation of acetic acid. Propionic acid and its salts (Na, K, and others) are used as fungicides. Propionic anhydride is used in the manufacture of cellulose esters, and geranyl propionate and various other esters are used in perfume bases.

References in periodicals archive ?
It could be seen here that the value of propionic acid is effective as compared to that of delignification of kikar wood was achieve in 180 min with respect to catalyst and charge ratio delignification.
This difference in chemical composition between the acid silage and the fresh waste of pirarucu is related to the addition of the mixture of formic and propionic acids in the preparation.
pH, lactic acid, acetic acid, propionic acid, butyric acid and V-score showing interaction effects between mixture ratio and storage period.
The primary product of the amylolytic bacteria is propionic acid.
Effect of treatment and ensiling time on pH, DM (%), CP (% in DM), ammonia (% of total N), lactic acid and total organic acids (g/ kg DM), and proportions of acetic, butyric and propionic acids of total VFA (%) pH DM CP Ensiling time Day 0 6.
05 Butyric acid (% DM) ND ND -- Propionic acid (% DM) ND ND -- Ammonia-N (% DM) 0.