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 ?
Moreover, as compared to formic and propionic acids, it gives better quality fractionated product with lower % residual lignin (PRL) than that of formic acid.
The results of the experiment show that acetic acid concentrations decreased as the percentage palm oil sludge in diet increased while propionic acid concentration increased as the palm oil sludge concentration in the diet increased.
Medians (ranges) of the concentration of propionic acid and lactic acid in gastric contents of the horses of the study during 4 weeks.
Current research suggests that the most significant byproduct is propionic acid, which contributes a chocolate aroma and may be partially responsible for the pleasing and complex aroma profile of malolactic fermentation.
2,2-dimethylol propionic acid (DMPA), 1,4-butanediol (BDO), [alpha],[omega]-bis(3-(1-methoxy-2-hydroxypropoxy)propyl)polydime-thylsiloxane, and [alpha]-N,N-dihydroxy-ethylaminopropyl-[omega]-butylpolydimethylsiloxane.
Propionic acid is a powerful and volatile antifungal agent used for protecting dry agricultural products, such as grain and cereals.
Temperature###Propionic acid concentration###pH###Methane###yield Acetic###acid Propionic###acid Propionic acid
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It does provide a tremendous amount of immune-enhancing and other health-promoting compounds such as beta-glucans, polyphenols, and various organic acids like gluconic acid, propionic acid, and malic acid.