L-Malic Acid


F2-hydroxybutanedioic acid; (S)-(−)-2-Hydroxysuccinic acid; L-Hydroxybutanedioic acid

Technical Data

CAS Number: 97-67-6
Molecular Formula: C4H6O5
Molecular Weight: 134.09
Beilstein Registry Number: 1723541
EC Number: 02-601-5

FabriChem Specifications

AppearanceWhite crystals or crystalline powder
Assay99.0% Min.
Specific Rotation-1.6° to -2.6°
Heavy Metals10 mg/Kg Max.
Arsenic (As)2 mg/Kg Max.
Lead (Pb)2 mg/Kg Max.
Residue on Ignition0.10% Max.
Chloride0.004% Max.
Sulfate0.02% Max.
Fumaric Acid0.5% Max.
Maleic Acid0.05% Max.
State of SolutionClear

Molecular Structure



Malic acid is an organic compound, and 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 is the naturally occurring and more bioavailable form of Malic Aid.