Process Flow of Maleic Anhydride Hydrogenation to 1,4-Butanediol.

Product Overview

Maleic anhydride (CAS No.: 108-31-6) is a key unsaturated organic anhydride with a chemical formula of C₄H₂O₃. It appears as white or light yellow crystalline flakes with a pungent odor, high reactivity, and excellent compatibility with various monomers and chemicals. As a versatile organic chemical raw material, it is widely used in polymers, coatings, pharmaceuticals, agriculture, and oil & gas industries, providing stable performance and reliable quality for industrial production.

Applications & Uses

Maleic Anhydride's versatility drives its use across numerous industries:

Unsaturated Polyester Resins (UPR)

Primary Application: Over 50% of global MA production is used in UPRs.

End-Use Products: Fiberglass-reinforced plastics, tanks, pipes, automotive parts, boat hulls, and construction panels.

Copolymers

Lubricant Oil Additives: Used as a component in copolymers that act as viscosity index improvers and dispersants.

Surface Coatings: A raw material for alkyd resins used in high-quality industrial paints and coatings.

Agricultural Chemicals

Intermediate: Used in the synthesis of pesticides, herbicides (e.g., Malathion), and plant growth regulators.

Food Additives

Fumaric and Malic Acid: Maleic Anhydride is a precursor to these non-toxic acids, used as acidulants in beverages and food products.

Other Applications

Paper Sizing: Used in the production of alkyl ketene dimer (AKD), a common sizing agent for paper.

Tetrahydrofuran (THF) / Gamma-Butyrolactone (GBL): Cis-Butenedioic Anhydride is an important route for producing these valuable solvents.

Succinic Anhydride: Readily converted to succinic anhydride for various chemical syntheses.

Technical Specifications

Item	Specification
Appearance	White or light yellow crystalline flakes, no visible impurities
Purity (GC)	≥ 99.5 %
Melting Point	52.5 - 54.5 °C
Boiling Point	202 °C
Moisture Content	≤ 0.2 %
Ash Content	≤ 0.01 %
Color (APHA)	≤ 50

Product Advantages

2 5-Furandine High Purity: Purity ≥ 99.5% ensures stable reaction performance and reduces by-products in downstream production.

Consistent Quality: Strict quality control throughout the production process (from raw material selection to finished product inspection) ensures batch-to-batch consistency.

Excellent Reactivity: High reactivity with diols, amines, and monomers enables efficient synthesis of downstream products.

Eco-Friendly Production: Adopts advanced production technology with low energy consumption and minimal waste, complying with international environmental standards.

Maleic Anhydride Acid Packaging & Storage

Packaging: 25kg net weight per kraft paper bag (with inner polyethylene liner) or 1000kg jumbo bags, suitable for sea and land transportation.

Storage: Store in a cool, dry, well-ventilated warehouse, away from heat sources, open flames, and strong oxidants. Avoid moisture absorption (may hydrolyze into maleic acid) and direct sunlight. Shelf life: 12 months under proper storage conditions.

Cis-Butenedioic Anhydride Safety & Handling

Personal Protection: Wear chemical-resistant gloves, goggles, and a dust mask when handling. Avoid direct contact with skin, eyes, and respiratory tract.

First Aid: In case of skin contact, rinse immediately with plenty of water for 15 minutes; in case of eye contact, rinse with water and seek medical attention. If inhaled, move to fresh air and consult a doctor.

Spill Handling: Absorb spilled material with inert absorbents (e.g., sand, vermiculite), collect in sealed containers, and dispose of according to local environmental regulations. Do not discharge into water sources or soil.