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Name:  Malic acid

Synonyms:   Disodium 2-hydroxybutanedioate

Molecular Structure:

Molecular Formula:  C4H4Na2O5

Molecular Weight:  178.05

CAS Number:  22798-10-3

Malic acid is an organic compound with the formula HO2CCH2CHOHCO2H. Malic acid is the active ingredient in many sour or tart foods. The salts and esters of malic acid are known as malates. Malate anion is an intermediate in the citric acid cycle along with fumarate. Ca. 1M kg/y are produced by the hydration of maleic anhydride. Malic acid is found mostly in unripe fruits.

Malic acid, when added to food products, is denoted by E number E296. Malic acid is the source of extreme tartness in so-called "extreme candy", for example Mega Warheads or Sour Punch candies. Malic acid is also used with or in place of the less sour citric acid in sour sweets such as Jolly Ranchers, Sweet Tarts and Salt & Vinegar flavor potato chips. These sweets are sometimes labeled with a warning that excessive consumption can cause irritation of the mouth.

Productname Malic acid
Molar mass 134.09 g mol−1
Assay (as C4H6O5) 99.0%~100.5%
Density 1.609 g/cm³
Melting Point 130 °C
Solubility in water 558 g/l (at 20 °C)
Optical purity( Chiral HPLC) 98.0% Min
Arsenic(As2O3) 2.0mg/kg Max
Heavy Metal(Pb) 20mg/kg Max
Residue On Ignition 0.1% Max
Chloride[Cl-] 0.01% Max
Acidity (pKa) pKa1 = 3.4, pKa2 = 5.13

Packing:   25kg net weight in cardboard drum or according to customer requirement

Storage:   Kept airtightly in a light-proof, dry and cool place.

Usage:   Malic acid is an important four-carbon atoms chiral pool. Malic acid is mainly

used in many fields including chiral pharmaceuticals, chiral additives and chiral auxiliaries.

Malic acid is used as chiral pool of chiral synthesis in pharmaceutical and food industries.

As an optically active organic acid, . Malic acid is insubstitutable in asymmetry synthesis of

some chiral compounds.



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