sent1: Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. It has a role as an allergen. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans.
sent2: थैलिक एनहाइड्राइड एक कार्बनिक यौगिक है।