E212 - Potassium Benzoate

Author: Leticia Celentano Time for reading: ~1 minutes Last Updated: April 20, 2024

CHAPTERS (Table Of Contents)

Characteristics: The potassium salt of benzoic acid is a solid hygroscopic white powder, odorless, soluble in ethyl alcohol and slightly in methyl, and in water 65 g in 100 ml at a temperature of 20C, does not dissolve

Characteristic

The potassium salt of benzoic acid is a solid hygroscopic white, odorless powder, soluble in ethyl alcohol and slightly in methyl, and in water 65 g in 100 ml at a temperature of 20 ° C, does not dissolve in ether. The density of potassium benzoate is 1.5 g / cm3. The melting point is above 300 ° C. It ignites spontaneously at temperatures above 950 ° C.

The synthetic substance is formed as a result of the reaction of benzoic acid with potassium carbonate, also in the oxidation of toluene and the interaction between potassium methylbenzoate and thioacetate. May contain impurities: free benzoic acid, carbonates, peroxybenzoates. Has the ability to inhibit the development of mold, yeast and some bacteria. It best exhibits its properties in low pH (below 4.5) environments, where it exists in the form of benzoic acid.

Use

Unlike benzoic acid and its sodium salts, E 212 is rarely used. Potassium benzoate preserves products and beverages with acidic environment such as: fruit juices (with citric acid), carbonated beverages (with carbonic acid), soft drinks (with phosphoric acid), pickles (with vinegar). The preservative is used to extend the shelf life of low-calorie marmalades, candied cherries, cosmetics.

The process of preserving the product begins with the entry of benzoic acid into the cell. If the acidity of the intracellular space is less than or equal to 5 pH, the intensity of anaerobic fermentation of glucose, passing under the action of the enzyme phosphofructokinase, decreases to 95%.

E 212 is approved for use in most countries, including the United States, Canada, eurozone countries. In Europe, foods containing this preservative are not recommended for consumption by children.

Impact on humans

In combination with ascorbic acid, sodium and potassium benzoates can be in the form of benzene, which is known for its carcinogenic properties. Heating, light and long-term storage affect the level of benzene formation.

Potassium benzoate is absorbed in the gastrointestinal tract and excreted by the kidneys. Even small amounts of it have a toxic effect on animals.

The permissible daily amount is 5 mg / kg. E 212 is a supplement that has a carcinogenic effect, causes allergic reactions, asthma, urticaria, stomach irritation, behavioral changes. The foods it contains are not recommended for children, especially under 1 year, because the preservative is a cause of increased arousal and affects emotional and intellectual development.

E212 - Potassium Benzoate

CHAPTERS (Table Of Contents)

Characteristic

Use

Impact on humans

Related Articles