Maleic Anhydride 99.5% Min CAS 108-31-6

Maleic anhydride (CAS 108-31-6) is an industrial chemical intermediate supplied by Sinoright. The product is a white crystalline solid with a molecular formula of C4H2O3 and a molecular weight of 98.06.

The table below summarizes the product specification together with a representative batch result.

Note: Representative batch results are provided for reference only. Actual results may vary between production batches within the agreed specification.

Maleic anhydride is available in flake or briquette form for bulk orders. Form availability is confirmed with the quotation.

Standard packaging is 25 kg per bag. Container loading depends on pallet requirements and container size.

For orders with specific palletizing or loading requirements, please provide the details with your inquiry so that the loading plan can be confirmed before shipment.

Maleic anhydride is widely used as an industrial chemical intermediate in resin production and in the manufacture of downstream chemicals. Major application areas include unsaturated polyester resins, coatings, lubricant additives, paper chemicals and other chemical derivatives.

Unsaturated Polyester Resins

Maleic anhydride is an important raw material for the production of unsaturated polyester resins (UPR). These resins are widely used in fiberglass-reinforced composites for construction, automotive components, marine products, tanks, pipes and molded products.

Resins, Coatings and Paints

Maleic anhydride is used in the manufacture and modification of alkyd and polyester resins for coatings and paint applications.

Lubricant Additives

Maleic anhydride is also used as a chemical intermediate in the production of lubricant additives, including dispersants and corrosion-control additives used in automotive and industrial lubricant formulations.

Paper Sizing and ASA Production

Maleic anhydride can be used in the production of alkenyl succinic anhydride (ASA), an intermediate widely used as a sizing agent in the paper industry.

Chemical Intermediates and Derivatives

As a versatile chemical building block, maleic anhydride is used in the manufacture of various downstream products and intermediates, including fumaric acid, malic acid, copolymers, surfactants, plasticizers and selected agrochemical intermediates.

Sinoright provides quality documentation and inspection support for bulk maleic anhydride orders, allowing buyers to review product specifications and shipment-related documentation.

A representative COA can be provided before order confirmation, while the corresponding batch COA is supplied with shipment. Third-party inspection and pre-shipment quality checks are available when required, and manufacturer REACH registration documentation can be provided on request.

Representative COA. Batch-specific COA is provided with confirmed shipments. 

 REACH registration preview. Certain supplier details are redacted for commercial confidentiality.

Sinoright supplies maleic anhydride for bulk international orders. Availability is confirmed against the required form, quantity, destination and delivery schedule when the quotation is prepared.

For time-sensitive orders, please provide the required quantity, destination and expected shipment schedule when requesting a quotation so that current availability can be confirmed. Samples of up to 200 g are available for evaluation. Courier cost is normally paid by the buyer and can be credited against a subsequent commercial order.

Sinoright coordinates supply confirmation, pre-shipment checks and export logistics for bulk maleic anhydride orders.

Supply Confirmation Based on Order Requirements

Availability is confirmed against the required product form, quantity and delivery schedule before order confirmation.

Pre-shipment Risk Control

Product condition is checked before shipment, and loading records can be provided through shipment photographs. Additional inspection requirements can be coordinated when needed.

Export and Logistics Coordination

Sinoright coordinates packaging, container loading, export documentation and shipment arrangements from major Chinese ports including Shanghai, Qingdao and Ningbo.

ISO 9001 Quality Management System

Sinoright International Trade Co., Ltd. operates under an ISO 9001:2015 certified quality management system covering its import and export trade activities.

Maleic anhydride should be kept in tightly closed packaging and stored in a cool, dry and well-ventilated area. Protect the product from moisture and heat, and keep it away from flames, ignition sources and incompatible substances.

For transport, solid maleic anhydride is classified as:

For complete hazard, handling, first-aid and transport information, refer to the current Safety Data Sheet provided with the product.

Can I request flakes or briquettes?

Please indicate your preferred form, flakes or briquettes, when requesting a quotation.Availability of the requested form will be confirmed together with the offer.

Can I review a COA before ordering, and will the shipment have its own COA?

Yes. A representative COA can be provided before order confirmation for specification review. The corresponding batch-specific COA is provided with the confirmed shipment.

Can you arrange third-party inspection before shipment?

Yes. Third-party inspection can be arranged when required. Inspection requirements should preferably be confirmed before the order is finalized.

Is REACH documentation available for maleic anhydride?

Manufacturer REACH registration documentation is available on request. The registration is associated with the manufacturing source rather than Sinoright itself.

How can I get the current maleic anhydride price per ton?

Maleic anhydride pricing depends on current availability, quantity, form, destination, Incoterm and market conditions. Please provide your purchasing requirements for a current quotation.

For an accurate quotation and supply confirmation, please provide:

• Required quantity
• Preferred form: flakes or briquettes
• Destination port or country
• Palletizing requirements, if any
• Preferred Incoterm
• Expected delivery schedule
• COA, SDS, REACH or inspection requirements

Based on these details, Sinoright can confirm availability, the applicable specification, loading arrangements and commercial terms.

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