Maleic Anhydride

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108-31-6

Maleic Anhydride

HS Code:2917140000

EINECS No:203-571-6

UN NO.:2215


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Product Description

Main uses


  • Unsaturated Polyester Resin (UPR): Accounts for over 50% of consumption; used in fiberglass-reinforced plastics (FRP), automotive/marine components, and construction materials.

  • 1,4 - Butylene glycol (BDO): degradable materials (PBS/PBAT), PBT, THF, GBL

  • Coatings / Alkyd Resins: Modification to enhance hardness, drying properties, and water resistance (industrial paints, wood coatings)

  • Pesticides: Organophosphorus insecticides such as malathion and 4049.

  • Pharmaceuticals / Food: Fumaric acid, malic acid (acidity regulators), sulfonamides.

  • Auxiliaries: lubricating oil additives, papermaking sizing agents, rubber vulcanizing agents.


Specification Model Table


Test ItemTechnical specificationAnalysis Results
APPEARANCEWhite briquettesWhite briquettes
Purity (by MA)99.5 Min99.5 Min
Molten Colour25 Max25 Max
Solidifying Point52.5 Min52.5 Min
Ash0.005 Max0.005 Max
Iron3 Max3 Max


Packaging25 kg fiber drums / iron drums with PE inner liners; 50 kg / 100 kg iron drums
Storage ConditionsStore in a cool, dry, well-ventilated place, away from fire.
AppearanceWhite needle-like / flaky crystals, strong pungent odor
Purity99.50%
Density1.484 g/cm³
Chemical FormulaC₄H₂O₃
Molecular Weight98.06
Melting Point52.8 °C
Boiling Point202 °C


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