L-MALIC ACID

Item No.: 00105
L-malic acid, found in the pulp of immature hawthorn, apple and grape fruits. It can also be prepared from Fumaric Acid by biological fermentation. It is an important intermediate product in the internal circulation of the human body and is easy to be abs
  • TYPE:
    ACIDULANTS
  • CAS:
    97-67-6
  • EINECS:
    202-601-5
  • HS CODE:
    29181980
Description Specification Applications
Description
PRODUCTS INFORMATION
L-malic acid, found in the pulp of immature hawthorn, apple and grape fruits. It can also be prepared from Fumaric Acid by biological fermentation. It is an important intermediate product in the internal circulation of the human body and is easy to be absorbed by the human body. Therefore, as a food additive and functional food with excellent performance, it is widely used in the fields of food, cosmetics, medical and health care products.
BASIC INFORMATION AND CHEMICAL PROPERTIES
Form Powder
MF C4H6O5
MW 134.09
Melting point 101-103 °C (lit.)
Boiling point 167.16°C (rough estimate)
Density 1.60
Refractive index -6.5 ° (C=10, Acetone)
Pka (1) 3.46, (2) 5.10(at 25°C)
Storage temp. Store below +30°C
Specification
ITEMS STANDARD
APPEARANCE WHITE CRYSTALS OR CRYSTALLINE POWDER
ASSAY   99.0% MIN
SPECIFIC ROTATION -1.6 ~ -2.6
RESIDUE ON IGNITION 0.05% max
CHLORIDE 0.004% max
SULPHATE 0.02% max
STATE ON SOLUTION CLARIFICATION
READILY OXIDIZABLE SUBSTANCE QUALIFIED
FUMARIC ACID 1.0% max
MALEIC ACID 0.05% max
HEAVY METALS (AS PB) 20PPM MAX
ARSENIC ( AS) 2PPM MAX
Applications

L-Malic acid is nearly odorless (sometimes a faint, acrid odor) with a tart, acidic taste. It is nonpungent. May be prepared by hydration of maleic acid; by fermentation from sugars.
In Food:
L-malic acid is an important component of natural fruit juice. Compared with citric acid, L-malic acid has high acidity (sour taste is 20% stronger than citric acid), but it tastes soft (with high buffer index), has special flavor, does not damage mouth and teeth, is metabolically conducive to amino acid absorption and does not accumulate fat. It is a new generation of food sour agent.
In Pharmaceutical:
L-Malic acid in various tablets and syrups can present fruit flavor and is conducive to absorption and diffusion in the body. It is often mixed with compound amino acid injection to improve the utilization of amino acids. Its sodium salt is an effective drug for the treatment of liver dysfunction, especially hypertension. Potassium L-malate is a good potassium supplement. It can maintain the water balance of the human body and treat edema, hypertension and fat accumulation.
In Daily chemical industry 
Zinc L-malate is used in toothpaste as antibacterial spot agent, anti calculus agent, synthetic perfume formula, etc.
In Chemical industry
It can be used as one of the synthetic raw materials of descaling agent and fluorescent whitening agent. When added to shellac varnish or other varnishes, the paint surface can be prevented from scaling. The polyester resin and alkyd resin produced with this kind of acid are plastics with special purposes.

Send your message to us