CAS · 108-31-6
Product Overview
Maleic anhydride is a high-purity pharmaceutical-intermediates supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Appearance: | White to slightly yellow blocky or flaky crystals |
|---|---|
| Purity: | 99.6% min. |
| Melt colority (Platinum-cobalt): | 20 Hazen max |
| Crystallization point: | 52.5℃ min |
| Residue on ignition: | 0.005% max |
| Iron (as Fe): | 1.5 µg/g max |
Applications
1. Polymer and Resin Industry
Production of Unsaturated Polyester Resins (UPR):
Maleic anhydride is widely used as a co-monomer with styrene and other vinyl monomers to produce unsaturated polyester resins used in fiberglass-reinforced plastics, automotive parts, and construction materials.
Alkyd Resins:
Reacts with polyols to form alkyd resins used in coatings, paints, and varnishes.
Maleic Copolymers:
Used in the synthesis of copolymers such as maleic anhydride-styrene and maleic anhydride-vinyl acetate, which serve as dispersants, adhesives, and compatibilizers.
2. Agricultural Chemicals
Fungicides and Herbicides:
Maleic anhydride derivatives are used in the synthesis of several agrochemicals.
Plant Growth Regulators:
Some maleic anhydride-based compounds function as growth regulators and soil conditioners.
3. Additives and Surfactants
Dispersants:
Maleic anhydride copolymers act as dispersants in detergents and water treatment chemicals.
Emulsifiers and Surfactants:
Modified maleic anhydride polymers are used to stabilize emulsions and suspensions.
4. Pharmaceuticals and Fine Chemicals
Intermediate in Drug Synthesis:
Maleic anhydride is a building block in the synthesis of pharmaceuticals, dyes, and other specialty chemicals.
5. Food and Beverage Industry
Food Packaging:
Maleic anhydride copolymers are used in barrier films and packaging materials to improve durability and shelf life.
Benefits
High Reactivity:
The anhydride functional group readily undergoes ring-opening reactions with nucleophiles, enabling versatile chemical modifications.
Polymer Compatibility:
Enhances adhesion, cross-linking, and compatibilization in polymer blends.
Cost-Effective Raw Material:
Readily available and relatively inexpensive, supporting large-scale industrial use.
Versatility:
Suitable for a wide range of chemical processes from large-scale polymer manufacturing to fine chemical synthesis.
Conclusion
Maleic anhydride (CAS 108-31-6) is a versatile and widely used industrial chemical with critical applications in polymer production, agriculture, additives, and pharmaceuticals. Its strong electrophilic nature and ease of chemical modification enable its use in synthesizing a broad array of products, from unsaturated polyester resins to agrochemicals and fine chemicals. With its combination of reactivity, availability, and cost-effectiveness, maleic anhydride remains a cornerstone raw material for diverse manufacturing sectors.
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