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Malic AcidL-Malic acid DL-Malic acid
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Product: Views:256Malic AcidL-Malic acid DL-Malic acid 
Unit price: Negotiable
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Valid until: Long-term effective
Last updated: 2017-11-21 05:51
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Details

Details:

Malic acid is an organic compound with the molecular formula C4H6O5. It is a dicarboxylic acid that is made by all living organisms, contributes to the pleasantly sour taste of fruits, and is used as a food additive. Malic acid has two stereoisomeric forms (L- and D-enantiomers), though only the L-isomer exists naturally. The salts and esters of malic acid are known as malates. The malate anion is an intermediate in the citric acid cycle. 

L-Malic Acid can be widely found in vegetables and fruits, especially in apples, bananas, oranges, beans, potatoes and carrot. As our body only contains malic dehydrogenase, so we can only make full use of L-Malic Acid. And L-Malic Acid is a vital product of our food additives and food ingredients.

Malic acid was important in the discovery of the Walden inversion and the Walden cycle, in which (−)-malic acid first is converted into (+)-chlorosuccinic acid by action of phosphorus pentachloride. Wet silver oxide then converts the chlorine compound to (+)-malic acid, which then reacts with PCl5 to the (−)-chlorosuccinic acid. The cycle is completed when silver oxide takes this compound back to (−)-malic acid.

Application:

(1) In food industry: it can be used in the processing and concoction of beverage, liqueur, fruit juice and the manufacture of candy and jam etc. It also has effects of bacteria inhibition and antisepsis and can remove tartrate during wine brewing.

(2) In tobacco industry: malic acid derivative (such as esters) can improve the aroma of tobacco.

(3)In pharmaceutical industry: the troches and syrup compounded with malic acid have fruit taste and can facilitate their absorption and diffusion in the body.

(4) Daily chemical industry: as a good complexing agent, it can be used for toothpaste formula, spice synthesis formulas and so on. It also can be used as a deodorant and detergent ingredients. As a food additive, malic acid is an essential food ingredient in our food supply.As a leading food additives and food ingredients supplier in China, we can provide you with high quality malic acid.

ITEMS

STANDARD

Appearance

White crystals or crystalline powder

Assay

99.0% min

Specific Rotation

-1.6 o --- -2.6 o

Residue on ignition

0.05% max

Chloride

0.004% max

Sulphate

0.02% max

State of solution

clarification

Readily oxidizable substance

Qualified

Fumaric Acid

1.0% max

Maleic Acid

0.05% max

Heavy metals(as Pb)

20 ppm max

Arsenic(As)

2 ppm max

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