CAS 617-48-1

CAS 617-48-1 Appearance 

CAS 617-48-1 Details

Chemical Name: DL-Malic acid

CAS No.: 617-48-1

Molecular Formula: C4H6O5

Formula Weight: 134.09

DL-Malic acid Structure:DL-Malic acid Structure

Assay: 99.0%-100.5%

CAS 617-48-1 Typical Properties

Item Specification Result
Assay(%) 99.0-100.5 99.4
Specific rotation -0.1- +01 0
Melting range(℃) 127-132 128.9
Water insolubles(%) ≤0.1 0.006
Sulphates ash(%) ≤0.1 0.05
Fumaric acid(%) ≤1.0 0.62
Maleic acid(%) ≤0.05 0.01
Heavy metals (PPM) ≤5 <5
Arsenic(PPM) ≤2 <2
Lead(PPM) ≤2 <2
Mercury(PPM) ≤1 <1
Loss on drying(%) ≤0.3 0.25
Copper(PPM) ≤50 <50
Zinc(PPM) ≤25 <25
Residue on igntion(%) ≤0.05 0.03
Identification test Ir absorption comformed
Conclusion The results conforms with enterprise standards


What is DL-Malic acid?

In nature, malic acid exists in three forms, namely D-malic acid, L-malic acid and DL-malic acid. DL-malic acid is a mixture of D-malic acid and L-malic acid.

CAS 617-48-1 Applications

CAS 617-48-1 use in cosmetic

Contains natural moisturizing ingredients of malic acid, can be easily dissolved in &ldquo bonding between drying flake of dead cells; stickies ”, which can clear the skin surface wrinkles, make skin tender, smooth and elastic, so favored in cosmetic formulations.

CAS 617-48-1 use in food additives

The palate of malic acid is close to natural juice and has a natural fragrance. Compared with citric acid, malic acid has greater acidity (sour taste is 20% stronger than citric acid), lower heat output, softer taste (higher buffering coefficient) and longer detention time. The corrosion damage is weak, and the wear of the tooth enamel is small, which does not damage the mouth and teeth. Malic acid is a new generation of food acidity, which is known as &ldquo in the biological and nutritional fields; the most ideal food acidity agent ” It is widely used in many kinds of foods, such as wine, beverage, jam, chewing gum and so on. It has become the third place food sour agent after citric acid and lactic acid. It is one of the most widely used organic acids in the world food industry.

The taste and flavor can be improved by adding malic acid in cool drinks, powder drinks, lactic acid drinks, milk drinks and juice drinks. Malic acid with two peptide synthetic sweetening agent aspartame, add flavor soft drinks as a fixing agent. As its acid flavor is better than citric acid, the application of malic acid in the food industry has gradually replaced citric acid in recent years. When there is a certain amount of pectin and sugar, acid is the key condition for the formation of the gel. Malic acid can make the pectin gel effect, so it can be used to make fruit cake, jelly gel jelly and puree etc.

CAS 617-48-1 use in industry

One of the raw materials for the synthesis of malic acid can be used as detergents, fluorescent whitening agent. Polyesters and alkyd resins produced with malic acid are a kind of plastic with special purpose. Malic acid can also be used as industrial cleaning agent, resin curing agent, synthetic material plasticizer, feed additive, etc. DL-malic acid is used in the textile industry as an anti-coagulant, a fluorescent whitening agent, and the like.

The existing malic acid purification methods mainly include the following:

(1) Solvent extraction method: After extraction with a solvent such as MeCOCH2CHMe2, Et2CO, Et2O, the content of maleic acid and fumaric acid in the DL-malic acid solution can be reduced to 0.02% or less.
(2) Precipitation method: calcium hydroxide is added to the DL-malic acid solution, and the crystal precipitated in the form of DL-malate is separated by acidification, and the purified DL-malic acid can be obtained.

The solvent extraction method and the precipitation method are cumbersome due to the operation process, and the introduction of the third substance increases the difficulty of separation, and the obtained sample has low purity, so it is not suitable for industrial production. Due to cost and technical reasons, there is currently no production of malic acid free of maleic acid and fumaric acid. Because maleic acid is highly toxic, the FDA stipulates that its content in malic acid should not exceed 0.05%. With the development of malic acid physiological function and attention to food safety, there is an urgent need for an efficient and economical removal of malic acid. The method of coming to acid and fumaric acid.

CN200910194154.8 provides a method for purifying electronic grade high-purity DL-malic acid; the method adopts unsaturated acid polymerization method to achieve ED-malic acid produced by high temperature and high pressure hydration to achieve electronic grade purity. The object of the present invention is achieved by the following technical solution: a method for purifying an electronic grade high-purity DL-malic acid, which comprises the following steps: adding azobisisobutylphosphonium hydrochloride to a DL-malic acid solution. The salt initiator is subjected to polymerization under heating and stirring conditions in a protective gas atmosphere; cooled to room temperature, and the polymer precipitate is removed by filtration to obtain a filtrate; the filtrate is subjected to hot air drying to obtain an electronic grade high-purity DL-malic acid.

Compared with the prior art, the invention has the following advantages and beneficial effects: the invention effectively removes maleic acid and fumaric acid, and the prepared DL-malic acid has a purity of more than 99.5%; the preparation process of the invention is simple and saves Production cost, easy to operate, low cost, less environmental pollution, make the production of malic acid green; beneficial to the industrial application of DL-malic acid to meet people’s needs.

CAS 617-48-1 Packaging and Shipping

Package: 25kg/bag

CAS 617-48-1 in Storage

Stored in the dry and ventilated inside storeroom, prevent direct sunlight, slightly pile and put down

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