maleic Anhydride

Maleic Anhydride

1. Basic Information

• Chemical Name: Maleic Anhydride
• English Name: Maleic Anhydride
• Chemical Formula: C₄H₂O₃
• Molecular Weight: 98.06 g/mol
• CAS Number: 108-31-6

2. Physical and Chemical Properties

• Appearance: Colorless crystals or solid
• Odor: Pungent acidic smell
• Melting Point: 52-54 °C
• Boiling Point: 202 °C
• Density: 1.48 g/cm³
• Solubility: Soluble in water, alcohol, ether, and most organic solvents
• pH: Acidic

3. Applications

• Polymer Manufacturing: Widely used in producing polymers such as polyester and polyether, mainly for plastics, coatings, and adhesives.
• Resins: A primary monomer in unsaturated polyester resins, used in construction, automotive, and electronics.
• Pharmaceutical Synthesis: Used as an intermediate in pharmaceutical synthesis, including antibiotics and other drugs.
• Agricultural Chemicals: Used in the production of pesticides and herbicides.
• Additives: Used as additives in paints, coatings, and rubber to enhance performance.

4. Safety

• Hazard Classification: Irritates skin, eyes, and respiratory system.
• Protective Measures: Gloves, goggles, and appropriate protective clothing should be worn to avoid contact with skin and eyes.
• Storage Conditions: Store in a cool, well-ventilated area, away from strong oxidizers and water.

5. Packaging and Transportation

• Typically supplied in 25 kg bags or drums.
• During transport, prevent damage, leakage, and moisture to ensure packaging remains intact.

6. Reactivity

• Maleic anhydride reacts with water to form maleic acid.
• Can undergo esterification and amidation reactions with alcohols, amines, and other substances to form the corresponding esters or amides.
• Widely used in various organic synthesis reactions in the chemical industry.