propionic acid is a food additive, a preservative.Outwardly it looks like oily liquid pale yellowish or not having any at all.
propionic acid has a sour taste and pungent smell.The chemical formula of the substance - S2N5SOON.
Preparation propionic acid
substance E280 in nature contained in an oil and as a by-product in the fermentative individual plants.During fermentation of carbohydrates is also formed propionic acid.Obtaining a biological method is the metabolic decomposition of fatty acids which contain carbon atoms in an odd number, and expansion of individual amino acids.
bacteria of the genus Propioni bacterium produce a substance as an end product of anaerobic metabolism.Since these bacteria are often present in the stomach of ruminants, some types of cheese have specific flavor.
Industrially propionic acid produced in the carbonylation reaction by Reppe ethylene by catalytic oxidation (in the presence of manganese ions or cobalt) propionaldehyde.Furthermore, a substance produced as a byproduct in the process of gas phase oxidation of hydrocarbons C4-C10.Previously
propionic acid was isolated as a byproduct during the production of acetic acid.However, modern technology in the manufacture of the latter pushed the old method of isolating a preservative into the background.
propionic acid is allowed to use in the form of a preservative in an amount of up to three grams per kilogram cheese (processed) products as well as products made from them, together with sorbic acid or its salts individually.It is also possible the use of preservatives in wheat (sliced packaged), rye for long term storage, as well as bread with a reduced energy value.Propionic acid permitted for use in pastry products, sweet baked goods.
through inhibition (delay) of certain enzymes preservative is able to provide non-specific inhibitory effect on the nature of many types of bacteria, mold and yeast, some species can absorb or produce it.
Limiting the amount of propionic acid used is inappropriate.This is due to the fact that at a concentration of 0.3% preservative significantly alters the taste and smell of the product.In this connection, in the food industry propionic acid is used in the form of calcium and sodium propionates substantially only during preservation of bakery products.
preservative E280 can inhibit (slow down) the development of microorganisms and serum of milk.In this regard, propionic acid is used in the preservation of milk whey for the purpose of storage and transportation.Moreover, this substance is used to protect the grain from excessively wet mold (if not sufficiently powerful dryers).
The use of propionic acid is quite common in other industries.So, a preservative used in the manufacture of drugs (Fenobolina, ibuprofen and others), fragrances (geranyl propionate, phenylpropionate, and others), plastics (polivinilpropionata) vinilplastifikatorov, solvent (propyl propionate, propyl propionate, etc.).
main danger, which can be E280 - burns likely to occur when dealing with concentrated acid.A number of studies have found that the preservative has toxicity, carcinogenicity and the ability to adversely affect the reproductive organs.
In the body, there is a rapid oxidation of propionic acid excretion is in the form of carbon dioxide in the Krebs cycle.
