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propionic acid Syllabification: pro·pi·on·ic ac·id
Pronunciation: /ˌprōpēˌänik ˈasəd/

Definition of propionic acid in English:


A colorless pungent liquid organic acid produced in some forms of fermentation and used for inhibiting the growth of mold in bread.
  • Alternative name: propanoic acid; chemical formula: C2H5COOH
Example sentences
  • Two other simple carboxylic acids are propionic acid and butyric acid.
  • Each population cage contained two standard 240-ml food bottles, each containing 50 ml of standard fly medium containing sucrose, corn meal, yeast, agar, benzoic acid, methyl paraben, and propionic acid.
  • Such breads are almost always chock full of preservatives like sorbic acid and propionic acid, which help to ward off mold.


Pronunciation: /ˈprōpēəˌnāt/
Example sentences
  • At open-label baseline, pulmonary function of patients who had previously been treated with once-daily or twice-daily fluticasone propionate was improved compared with those previously treated with placebo.
  • The prescribing of halobetasol propionate is limited to quantities less than 50 grams per week and to a two-week supply; additionally open-ended prescriptions will not be dispensed.
  • The other group received the same doses of fluticasone propionate and mometasone furoate, but reversed in order, as shown in Figure 1.


Mid 19th century: propionic from French propionique, from Greek pro 'before' + piōn 'fat', it being the first or lowest molecular-weight member of the fatty acid series to form fats.

Definition of propionic acid in:
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