Phthalic anhydride, an organic compound, is a cyclic anhydride formed by dehydration of phthalic acid molecules. It is a white crystalline powder, insoluble in cold water, slightly soluble in hot water, ether, ethanol, pyridine, benzene, carbon disulfide, etc. It is an important organic chemical raw material and an important intermediate for preparing phthalate ester plasticizers, coatings, saccharin, dyes and organic compounds.
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