DL-Malic acid, Powder
DL-Malic acid is a white or nearly white crystalline powder or granules with a strongly acidic taste. It is a racemic mixture of D- and L-malic acid, which means it contains equal amounts of both enantiomers. Here are some key properties and uses of DL-Malic acid:
Properties:
- Chemical Formula: C₄H₆O₅
- Molecular Weight: 134.09 g/mol
- Melting Point: 131-133°C
- Boiling Point: 150°C (at 101.325 Pa)
- Density: 1.609 g/cm³
- Solubility: Very soluble in water (500 g/L at 25°C), freely soluble in ethanol
- pKa: 3.458 (first dissociation), 5.097 (second dissociation)
- Stability: Stable under normal conditions, but incompatible with strong oxidizing agents, strong bases, amines, alkali metals, and carbonates
Uses:
- Food Industry: DL-Malic acid is commonly used as an acidity regulator and flavoring agent in food and beverages. It provides a tart taste and is often found in products like candies, soft drinks, and fruit-flavored items.
- Pharmaceuticals: It is used in the formulation of various pharmaceutical products due to its acidifying properties.
- Cosmetics: DL-Malic acid is used in cosmetic formulations for its exfoliating and pH-adjusting properties.
- Chemical Synthesis: It is utilized in the preparation of chiral compounds and for chiral resolution by ligand-exchange capillary electrophoresis.
DL-Malic acid is a versatile compound with a wide range of applications in different industries. Its ability to enhance flavors and regulate acidity makes it a valuable ingredient in many products.
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