Phthalic anhydride is an organic compound, C8H4O3, which is a circular anhydride formed by the dehydration of phthalic acid molecules. Phthalic anhydride is a white solid, it is an important raw material in the chemical industry, especially used in plasticizer manufacture. HS code for PA is 2917350000. As one of the best phthalic anhydride suppliers in China, Douwin has many high-quality products. If you are looking for reliable phthalic anhydride suppliers and phthalic anhydride manufacturers, and interested in phthalic anhydride, please contact us. Douwin is your trustworthy phthalic anhydride supplier and phthalic anhydride manufacturer.