Maleic Anhydride

Category: 

Organic Acid Anhydride / Chemical Intermediate / Polymer Raw Material 

Description: 

Maleic Anhydride (C₄h4O₃) is a white crystalline solid with a pungent, acrid odor. It is the anhydride of maleic acid and is produced by the oxidation of benzene or n-butane. It is a highly reactive chemical intermediate, primarily used in the manufacture of unsaturated polyester resins (UPR), alkyd resins, and co-polymers. Maleic anhydride reacts readily with alcohols, amines, and water, forming esters, amides, and maleic acid respectively — making it a versatile building block for numerous industrial products. 

Applications: 

1. Unsaturated Polyester Resins (UPR) Key raw material for fiberglass-reinforced plastics, marine parts, and automotive components. 

2. Alkyd and Epoxy Resins Used to modify resins for improved hardness and chemical resistance. 

3. Co-polymers and Plastic Additives Reacts with monomers such as styrene, acrylic acid, or butadiene to form copolymers used in adhesives, coatings, and lubricants. 

4. Agricultural Chemicals Intermediate for fumaric acid, malic acid, and plant growth regulators. 

5. Surfactants and Detergents Used in the manufacture of succinic acid derivatives, dispersants, and surface-active agents. 6. Lubricant Additives Used in polyisobutylene succinic anhydride (PIBSA), a precursor for detergent-dispersant additives in engine oils. 

Technical Details: 

Chemical Name - Maleic Anhydride 

Chemical Formula - C₄h4O₃ 

Molecular Weight - 98.06 g/mol 

Appearance - White crystalline flakes or solid 

Odor - Acrid, pungent odor 

Purity - ≥ 99.5% 

Melting Point - 52 – 56 °C

Boiling Point - 202 °C 

Flash Point - 102 °C (closed cup) 

Density (at 25 °C) - 1.48 g/cm³ 

Solubility - Reacts with water to form maleic acid 

Vapor Pressure (25 °C) - 0.1 mmHg 

HS Code - 2917 14 00 

Stability - Stable under normal storage; avoid moisture and heat 

Packaging: 

25 kg Bags / Fiber Drums (Solid Form) 

500 kg / 1000 kg Jumbo Bags 

Bulk Molten Form in ISO Tankers (kept above 60 °C) 

Storage & Handling: 

Store in a cool, dry, and well-ventilated area, away from moisture, heat, and oxidizing agents. Handle with care — maleic anhydride is corrosive and causes burns on contact with skin or eyes. Use gloves, face shield, and respiratory protection during handling.