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Maleic Anhydride

Maleic Anhydride (CAS no: 108-31-6) is an organic compound which is the acid anhydride of maleic acid. The chemical formula of Maleic Anhydride is C2H2 (CO)2O. The chemical appears to be colourless or white solid possessing an acrid odor. The chemical is soluble on water and has a density of 1.48g/cm3.



Maleic Anhydride is produced by the oxidation of benzene and butane. The whole process converts the methyl groups to carboxylate and dehydrogenates the backbone.

Benzene and butane are placed into a stream of hot air, and the combination of its mixture is passed through a catalyst bed at high temperature. The proportion of air to hydrocarbon is controlled to stop the mixture from igniting. Vanadium pentoxide and molybdenum trioxide are the catalysts function for the benzene route, whereas vanadium phosphate is used for the butane route. 



  • Industries buy Maleic Anhydride for the production of multitude of resins and plastics.

  • Maleic Anhydride is a used in the production of thermoplastic polyurethanes, elastane/ Spandex fibers, polybutylene terephthalate (PBT) resins and many other products.  

  • Maleic Anhydride suppliers and manufacturers are using to manufacture unsaturated polyester resins (UPR).

  • Food industries buy Maleic Anhydride as an artificial sweeteners and flavour enhancement agents.

  • Personal care industries buy Maleic anhydride for using in hair sprays, adhesives and floor polishers.

  • Maleic anhydride suppliers and manufacturers also use the chemical in water treatment chemicals, detergents and insecticides and also in fungicides.



Below are some of the safety measures that Maleic anhydride suppliers and manufacturers must take before handling the chemicals:

  • Inhalation of dust or vapor might cause irritation in the nose and throat. Coughing, sneezing, and burning of the throat are some of symptoms to be experienced.

  • Swallowing can cause sore throat, abdominal pain, and vomiting. Can reason in burns to the digestive tract.

  • Exposure of dust or vapor may cause burns or irritation of the eyes with swelling. Sensitivity to light and double vision may occur.


Storage and Handling

Maleic anhydride suppliers must keep in a tightly closed container; store it in a cool, dry, ventilated area. Isolate the chemical from incompatible substances. It is advisable to not reuse container. Containers of this chemical may be hazardous when empty since they retain product residues. Prevent dust formation and control ignition sources. Empty the container only into inert or non-flammable atmosphere.


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