1. Overview
Maleic Anhydride (MA) is an organic compound with the chemical formula C₄H₂O₃ and CAS number 108-31-6. It is a white crystalline solid with a strong, acrid odor and is highly reactive due to its anhydride structure. MA is primarily produced via the oxidation of n-butane or benzene, though the butane-based process is more common today due to cost and environmental advantages.
2. Key Applications
2.1 Unsaturated Polyester Resins (UPRs)
- The largest application of MA, accounting for ~50% of global demand.
- Used in fiberglass-reinforced plastics for automotive parts, marine vessels, and construction materials.
2.2 Butanediol (BDO) & Tetrahydrofuran (THF) Production
- MA is hydrogenated to produce 1,4-butanediol (BDO), a precursor for spandex, polyurethanes, and biodegradable plastics.
- BDO is further processed into THF, used in adhesives and coatings.
2.3 Copolymers & Additives
- MA is used in copolymers (e.g., with styrene or vinyl acetate) for coatings, adhesives, and lubricant additives.
- Acts as a corrosion inhibitor in metal treatment.
2.4 Food & Pharmaceuticals
- Minor use in food acidulants (e.g., fumaric acid and malic acid production).
- Intermediate in pharmaceutical synthesis.
3.Analysis
| 99% MIN | 99.71 | |||||||
| 50 MAX | 13 | |||||||
| 52℃ MIN | 52.5 | |||||||
| 0.005% MAX | <0.001 | |||||||
| 3PPM MAX | 0.32 | |||||||
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Един чифт: CAS №:68-12-2 N,N-диметилформамид(DMF)