International name: Malic Acid

Synonyms: oxyantaric, hydroxybutanedioic, malonic acid

Chemical formula: C4H6O5

Appearance: colorless hygroscopic crystals

Production: Belgium, China

Packing and storage: p / e canister, no more than 2 years

 

Description

Malic acid (malonic acid, oxyuccinic acid, additive E296) is an organic compound with the molecular formula C4H6O5. It is a dicarboxylic acid, which gives a pleasant, sourish taste to fruit, it is also used as a food supplement. Apple acid is an organic compound that is found in fruits such as apples. Apple acid is present in green apples, grapes and in most wines. Its taste is very strongly felt in the rhubarb. Salts and malonic acid esters are called malates. Malate anion is an intermediate product of the metabolism of all living organisms. Applelic acid has two forms of stereoisomers (L- and D-enantiomers), of which only the L-isomer exists in nature. L-malic acid is a natural form, while the mixture of L and D (E296) is produced by an industrial method - by double hydration of maleic anhydride.

 

Properties

Apple acid - colorless hygroscopic crystals, readily soluble in water and ethyl alcohol, insoluble in benzene, ether and aliphatic hydrocarbons. There are two stereoisomers (D and L) and a racemate. Admissible daily intake of food additive E296 is not limited, D-acid is prohibited for use in products for infants. It has antioxidant, cleansing, moisturizing, anti-inflammatory and slightly astringent properties. Stimulates the synthesis of collagen in the skin.

DL-malic acid. The melting point is 125-130 ° C. The boiling point is 150 ° C. Easily soluble in water and ethanol.

L-malic acid. The melting point is 100 ° C. The decomposition temperature is 140 ° C. The density is 1.595 g / cm3.

 

Receiving

Obtain malic acid as a natural way, secreting from fruits, and chemically. Also this acid is contained in tobacco as a nicotine salt. Chemically, the production of malic acid is the hydration of maleic acid at a temperature of 170-200 degrees. It is also possible to obtain salts of malic acid, which are called malates. Malates are useful substances for the human body. They promote metabolism, improve blood circulation and digestion. Apple type D acid is derived from tartaric acid and used as a component in food products.

 

Application

Apple acid has found its application in the composition of toothpastes, as well as care products for the oral cavity. Thanks to antioxidant, exfoliating, whitening, cleansing, anti-inflammatory, moisturizing, astringent properties of malic acid, it is widely used in cosmetics and cosmetology.
The compound of apple, milk, wine and lemon is used in anti-cellulite, bleaching agents, as well as in peelings.
E296 (malic acid) is used to strengthen the acidic taste of food. A wide range of preservatives E296 found in the production of confectionery, bakery, as well as beverages and fruit juices. Use malic acid also in the production of canned goods, wines and soft drinks.

 

Safety requirements

According to GOST, hydroxybutanedioic acid is non-toxic, fire-and explosion-proof, for the human body moderately hazardous substance - the third hazard class. Work with acid should be conducted in overalls in rooms with supply and exhaust ventilation. Store it on wooden shelves in dry and heated rooms at a temperature of + 10 ... 25C and humidity less than 70%.

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