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Phthalic anhydride

Phthalic anhydride

Phthalic anhydride is an organic compound and is the anhydride of phthalic acid. It is produced by heating phthalic acid and splitting off water. The partial oxidation of o-xylene produces the colorless, crystalline solid.


The main use of phthalic anhydride is as a base material for the production of plasticizers for plastics (particularly PVC). Furthermore, it is sold as a raw material for synthetic resins, as a component of surface coatings for wood, or for the preparation of dyes and pigments.

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