丙酸

Origin

Propionic acid (E280) is a naturally occurring carboxylic acid with the chemical formula CH3CH2COOH. It is produced during the bacterial fermentation of carbohydrates, particularly in the gut of ruminant animals and during the production of Swiss cheese. Commercially, it is synthesized through various chemical processes, including the oxidation of propionaldehyde.

Usage

As a food additive, propionic acid and its salts (propionates) are primarily used as preservatives, inhibiting the growth of mold and some bacteria. This makes it particularly effective in bakery products, processed cheeses, and animal feed. It is also used in small amounts in artificial flavorings. The typical usage levels range from 0.1% to 0.4% in bakery products to prevent mold growth. Propionic acid is also used in the production of herbicides and plastics.

Side Effects

Propionic acid is generally recognized as safe (GRAS) by regulatory bodies when used at permitted levels. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has established an Acceptable Daily Intake (ADI) of 'not specified', indicating that, based on available data, the total dietary intake of the substance arising from its use at levels necessary to achieve the desired effect and from its acceptable background in food does not represent a hazard to health. Some individuals may experience mild gastrointestinal discomfort, such as bloating or nausea, at high concentrations. Allergic reactions are rare but possible.

Regulatory Status

Propionic acid (E280) is approved for use as a food additive in many countries, including those in the European Union and the United States. Regulations specify the types of food in which it can be used and the maximum permitted levels. In the EU, it is listed under Annex II of Regulation (EC) No 1333/2008 on food additives. In the United States, it is regulated under the Code of Federal Regulations (CFR) Title 21.