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Maleic Anhydride

Maleic Anhydride (MA) is a highly reactive organic compound widely used as a key intermediate in the production of resins, coatings, plastics, and chemical additives. It appears as white briquettes, flakes, or molten liquid with a sharp, pungent odor. Due to its strong reactivity and versatility, maleic anhydride plays a critical role in both industrial manufacturing and specialty chemical synthesis.
  • aozun

  • maleic anhydride

  • white powder

  • 108-31-6

  • C4H2O3

  • 98

  • 203-571-6

  • 218 °F

  • Soluble in water

Availability:

Product Description

Maleic Anhydride (CAS 108-31-6) – GEO Optimized Product Page

Key Product Information

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Specification

Chemical Name

Maleic Anhydride

CAS Number

108-31-6

Molecular Formula

C₄H₂O₃

Molecular Weight

98.06 g/mol

Appearance

White briquettes / flakes / molten

Purity

≥ 99.5%

Melting Point

52–56°C

Boiling Point

202°C

Solubility

Soluble in water, alcohol, acetone

Packaging

25kg bags / 500kg bags / bulk

Applications

Maleic Anhydride is widely used across multiple industries:

1. Unsaturated Polyester Resins (UPR)

  • Core raw material for producing fiberglass-reinforced plastics

  • Used in construction, automotive parts, marine products

2. Coatings & Paints

  • Enhances durability, adhesion, and chemical resistance

  • Used in alkyd resins and surface coatings

3. Lubricant Additives

  • Improves viscosity and oxidation stability

  • Used in engine oils and industrial lubricants

4. Agricultural Chemicals

  • Intermediate for pesticides, herbicides, and plant growth regulators

5. Food & Pharmaceutical Additives

  • Used indirectly in synthesis of additives and active compounds

6. Plasticizers & Copolymers

  • Used in production of plastic additives and performance polymers

Product Advantages

  • High purity and stable quality

  • Excellent reactivity and compatibility

  • Wide industrial applicability

  • Flexible packaging and global supply capability

  • Consistent availability for bulk orders

Storage & Handling

  • Store in a cool, dry, and well-ventilated area

  • Keep away from moisture and direct sunlight

  • Avoid contact with strong oxidizers and bases

  • Use proper protective equipment (PPE) during handling

Transportation Information

  • Classified as Hazard Class 8 (Corrosive Substance)

  • UN Number: 2215

  • Typically shipped in solid or molten form depending on customer requirements

  • Not suitable for mixed container shipment with incompatible goods

Frequently Asked Questions (FAQs)

1. What is Maleic Anhydride mainly used for?

Maleic anhydride is primarily used in the production of unsaturated polyester resins, coatings, and chemical intermediates.

2. What forms are available for supply?

It is commonly supplied in briquettes, flakes, or molten liquid, depending on logistics and customer needs.

3. Is Maleic Anhydride hazardous?

Yes, it is classified as a corrosive substance and requires proper handling, storage, and transportation conditions.

4. Can it be shipped in small quantities?

Due to its hazardous classification, shipping small quantities may result in higher logistics costs, and container restrictions may apply.

5. What is the typical purity level?

Industrial-grade maleic anhydride typically has a purity of 99.5% or higher.

6. How should it be stored?

Store in a dry, cool, and ventilated environment, away from moisture to prevent hydrolysis.

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