Your One-Stop Maleic Anhydride Manufacturer and Supplier – Suneco Chemical
Maleic Anhydride Overview
Maleic Anhydride (CAS 108-31-6, Chemical Formula: C₄H₂O₃) is a white granular organic compound with a characteristic pungent odor.
It is one of the most important industrial intermediates used in the production of unsaturated polyester resins (UPR), plastic additives, lubricant agents, agrochemicals, and coatings.
With a melting point of 52.8°C and boiling point of 202°C, Maleic Anhydride (MAH) demonstrates excellent reactivity and versatility in industrial processes.
About Suneco Chemical – Trusted Maleic Anhydride Manufacturer in China
Located in Shandong, Suneco Chemical is a professional Maleic Anhydride manufacturer and exporter, providing high-purity (≥99%) industrial-grade Maleic Anhydride to global customers.
The factory follows ISO9001:2015-certified quality control systems, ensuring every batch meets international standards.
With years of export experience, Suneco Chemical has become a reliable supplier to industries in plastics, coatings, lubricants, and resins across Asia, Europe, and the Americas.
Suneco Chemical supports flexible order quantities, customized packaging, and timely ocean freight delivery, helping customers reduce lead times and maintain stable production.
Technical Data
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Chemical Name: Maleic Anhydride
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Chemical Formula: C₄H₂O₃
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CAS No.: 108-31-6
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EINECS No.: 203-571-6
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Purity: ≥99%
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Appearance: White crystalline solid or granule
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Melting Point: 52.8°C
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Boiling Point: 202°C
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Packaging: 25 kg/bag or customized packaging
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Freight: Ocean Freight Available
Applications of Maleic Anhydride
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Unsaturated Polyester Resins (UPR):
Maleic Anhydride reacts with diols to produce unsaturated polyester resins, which are widely used in fiberglass-reinforced plastics, automotive parts, boat hulls, and building materials.
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Plastic Additives and Masterbatches:
In polypropylene modification (PP-g-MAH), Maleic Anhydride is used to improve polymer compatibility, impact strength, and dispersion in plastic masterbatches and composite materials.
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Lubricant and Petroleum Additives:
It is a core ingredient for lubricant dispersants, corrosion inhibitors, and fuel additives, improving engine and fuel system performance.
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Agrochemicals and Coatings:
MAH acts as an intermediate in herbicide and pesticide production, as well as in alkyd coatings for industrial and marine applications.
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Other Uses:
Maleic Anhydride is also used in food acidulant synthesis (fumaric acid), flame-retardant formulations, and textile finishing agents.
Safety and Handling
Maleic Anhydride is a corrosive and moderately toxic compound, requiring careful handling.
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LD50 (oral, rat): 1090 mg/kg
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LD50 (dermal, rabbit): 2620 mg/kg
Exposure to dust or vapor may cause pharyngitis, laryngitis, bronchitis, or skin/eye irritation. Workers should use acid-resistant gloves, goggles, and protective clothing. Store in sealed containers away from moisture to prevent hydrolysis.
Suneco Chemical employs closed production systems and ventilation controls to ensure workplace safety and environmental protection.
Why Choose Suneco Chemical for Maleic Anhydride?
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High Purity (≥99%) Industrial Grade
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ISO9001:2015 Certified Production
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Stable Supply and Competitive Pricing
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Customized Packaging Options (25kg bags or per request)
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Quick Delivery via Ocean Freight
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Professional Export Documentation and Technical Support
Develop Your Maleic Anhydride Business with Suneco Chemical
As a leading Maleic Anhydride supplier and exporter in China, Suneco Chemical provides not only products but also long-term cooperation and value-added solutions.
Whether you are in resin manufacturing, plastics, agrochemicals, or coatings, our factory’s flexible inventory management ensures consistent supply and short lead times.
Suneco Chemical – Your One-Stop Maleic Anhydride Manufacturer.
Reliable quality, global delivery, and professional service — all from one trusted source.
Frequently Asked Questions (FAQ) about Maleic Anhydride
Q1: What is Maleic Anhydride?
A: Maleic Anhydride (CAS No. 108-31-6) is a white, crystalline organic compound with the chemical formula C₄H₂O₃.
It has a pungent odor and is widely used as a raw material in the production of unsaturated polyester resins, plastic additives, and lubricant agents.
It reacts easily with alcohols and amines, making it a valuable intermediate in various industrial applications.
Q2: What is the purity level of Maleic Anhydride supplied by Suneco Chemical?
A: Suneco Chemical supplies high-purity Maleic Anhydride with a minimum purity of 99%. Each batch is carefully tested under ISO9001:2015 quality standards to ensure consistent composition, stability, and performance for all industrial-grade applications.
Q3: What are the main applications of Maleic Anhydride?
A: Maleic Anhydride is primarily used in the manufacture of unsaturated polyester resins (UPR), which are applied in fiberglass, automotive parts, and coatings. It is also used in plastic masterbatches, agrochemical formulations, lubricant additives, corrosion inhibitors, food acidulants, and flame-retardant products. Its versatility makes it essential in many chemical industries.
Q4: How is Maleic Anhydride produced?
A: Most Maleic Anhydride is produced through the oxidation of n-butane or benzene using a catalyst at high temperature. Modern facilities, like those at Suneco Chemical, use n-butane oxidation processes because they are more environmentally friendly and yield consistent high-purity products.
Q5: What is the physical appearance and chemical behavior of Maleic Anhydride?
A: Maleic Anhydride appears as white flakes or granules with a sharp odor. It melts at 52.8°C and boils at 202°C. It is reactive with water, alcohols, and amines, and should be kept away from moisture because it hydrolyzes to maleic acid when exposed to humidity.
Q6: What safety precautions should be taken when handling Maleic Anhydride?
A: Maleic Anhydride is corrosive and moderately toxic. Direct skin or eye contact can cause burns, and inhalation of dust or vapor may irritate the respiratory tract. Always wear protective gloves, goggles, and clothing, and handle it in a well-ventilated area. Storage should be in sealed containers away from moisture and heat sources.
Q7: What are the toxicological data and potential health effects of Maleic Anhydride?
A: The LD50 (oral, rat) is 1090 mg/kg, and the LD50 (dermal, rabbit) is 2620 mg/kg. Inhalation can cause pharyngitis, bronchitis, and chest discomfort. Long-term exposure should be avoided. Suneco Chemical’s packaging and labeling follow global safety standards (GHS) to minimize risk during handling and transport.
Q8: What packaging options are available from Suneco Chemical?
A: Suneco Chemical offers 25 kg bags as standard packaging and can provide customized packaging solutions upon request. All materials are sealed, moisture-proof, and export-compliant to ensure product quality and safety during international shipment. Bulk and ocean freight delivery options are also available.
Q9: What are the storage and transportation requirements for Maleic Anhydride?
A: Maleic Anhydride must be stored in a cool, dry, and well-ventilated warehouse, away from heat sources and moisture. Containers should be tightly sealed. During transportation, it should be protected from rain, direct sunlight, and physical damage to prevent contamination and hydrolysis.
Q10: What certifications does Suneco Chemical hold for Maleic Anhydride production?
A: Suneco Chemical operates under ISO9001:2015-certified management systems. All products meet international environmental, health, and safety standards. The company provides Material Safety Data Sheets (MSDS) and COA reports with every shipment to ensure transparency and traceability for global clients.
Q11: Can Maleic Anhydride be used in the food or cosmetic industries?
A: Industrial-grade Maleic Anhydride is not directly used in food or cosmetics due to its reactive and irritant nature. However, it can be converted into derivatives like fumaric acid, which is widely used as a food acidulant in beverages, bakery items, and pharmaceutical formulations.
Q12: Why choose Suneco Chemical as your Maleic Anhydride supplier?
A: Suneco Chemical is a trusted manufacturer and exporter known for stable supply, competitive prices, and strict quality assurance.
With years of experience in international trade, the company provides customized packaging, technical support, and timely delivery, making it a reliable long-term partner for global buyers.
Q13: How can I get a quote or sample for Maleic Anhydride?
A: You can contact Suneco Chemical’s sales team directly through their official website or email.
The company offers free samples for testing, full export documentation, and flexible order options — from small test quantities to bulk shipments — with professional after-sales support.
Suneco Chemical – Your One-Stop Source for High-Purity Maleic Anhydride (CAS 108-31-6).
Reliable quality, competitive pricing, and professional service for global industries.
