DL-Malic Acid CAS 617-48-1
Food Additives 2025-03-20
Basic Information
| Parameter | Details |
|---|---|
| CAS Number | 617-48-1 |
| Synonyms | DL-Hydroxybutanedioic acid, (±)-Malic acid |
| Chemical Formula | C₄H₆O₅ |
| Molecular Weight | 134.09 g/mol |
| Physical State | White crystalline solid (triclinic) |
| Melting Point | 130–132°C |
| Boiling Point | 150°C (decomposes) |
| Flash Point | 203°C |
| Density | 1.609 g/cm³ |
| Solubility | Soluble in water (558 g/L at 20°C), methanol, ethanol, acetone |
| Optical Activity | Racemic mixture (no optical rotation) |
Production & Applications
| Category | Details |
|---|---|
| Manufacturing | Chemical synthesis (maleic anhydride hydration), benzene oxidation, fermentation |
| Food Industry | Acidulant, color stabilizer, preservative, emulsifier (beverages, jams, gums) |
| Pharmaceuticals | Drug intermediate/excipient (e.g., amino acid injections) |
| Chemical Industry | Scale inhibitor, fluorescent whitening agent; polyester/alkyd resin production |
| Other Uses | Feed additive, cosmetic ingredient, plant growth regulator |
Safety & Handling
| Aspect | Details |
|---|---|
| Hazard Classification | Combustible, corrosive; irritates eyes, skin, and mucous membranes |
| Protective Equipment | Dust mask, rubber gloves, acid-resistant clothing |
| First Aid | Rinse skin with soap and water; flush eyes with water for 15 minutes |
| Storage Conditions | Cool, dry place (<30°C); avoid heat, sparks, and incompatibles (oxidizers, bases) |
| Incompatibility | Strong oxidizers, strong bases, amines, alkali metals, carbonates |
Technical Specifications
| Property | Value |
|---|---|
| pKa Values | 3.458 (first dissociation), 5.097 (second dissociation) at 25°C |
| Stability | Stable under normal conditions; hygroscopic at high humidity |
| Packaging | 25 kg/bag |
