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 ?
Q IN a few weeks' time I'm hoping to buy a Mercedes E280 V6 Elegance.
I tested the E280, which is really a three-litre, and is the smallest to get the seven-speed automatic box.
62m), the clearance rate of just over 62 per cent weighed in as a gain of ten percentage points - 178 of 286 catalogued lots finding new homes - and a record price of E280,000 (pounds 190,422) was set in the opening session.
Mercedes-Benz is also giving discounts on its larger E-Class models, with typically pounds 3,000 off the price of the E280 CDI Elegance saloon whilst Saab is giving similar discounts off the 9-5 range, lowering the transaction price of the 2.
A MERCEDES E280 class which also costs more than pounds 30,000
The popular E280 model, which accounts for a large number of E-Class models sold in Ireland, is e62,220 (ex-works).
E-class prices have risen three per cent, with the E280 Classic (most basic equipment) pounds 940 dearer at pounds 32,840 but air conditioning and anti- skid control would have cost an extra pounds 3263 as options.
The Bundoran town council member offered her resignation within hours of being found guilty of stealing a E280 ladies' trouser suit.