Maleic Acid
Food Additives 2025-03-20
Basic Information
| Parameter | Details |
|---|---|
| CAS Number | 110-16-7 |
| Synonyms | Cis-butenedioic acid, Maleinic acid |
| Chemical Formula | C₄H₄O₄ |
| Molecular Weight | 116.07 g/mol |
| Physical State | Colorless crystalline solid (monoclinic) |
| Density | 1.59 g/cm³ (20°C) |
| Melting Point | 130–135°C |
| Boiling Point | 275°C |
| Solubility | Soluble in water, ethanol, acetone; slightly soluble in benzene; insoluble in chloroform, trichloromethane |
Applications
| Industry | Uses |
|---|---|
| Chemical Production | Unsaturated polyester resins, coatings, plastic additives |
| Pharmaceuticals | Drug intermediate |
| Food | Acidulant, preservative |
| Agriculture | Pesticide synthesis |
| Biotechnology | Inhibits glutamate decarboxylase (GAD) in E. coli and L. monocytogenes |
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) |
| Fire Response | Use water fog, foam, CO₂, or dry powder extinguishers |
Production & Notes
Manufacturing: Produced via benzene/butene oxidation to maleic anhydride, followed by hydrolysis.
Packaging: Typically 25 kg/bag with inner plastic lining.
Toxicity: Oral LD₅₀ in rats = 708 mg/kg (moderate toxicity).
This table provides a quick reference for Maleic Acid’s properties, applications, and safety guidelines. Let me know if you need further details!
