Pyromellitic Dianhydride (PMDA) from Japan
Pyromellitic dianhydride is a tetrafunctional aromatic dianhydride used in high-performance polyimides for electronics and aerospace. Falls under HTS 2917.39.70.00 as an aromatic polycarboxylic acid anhydride derivative. Its rigid structure enables superior thermal stability.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Molecular weight and purity certification required to distinguish from polymer intermediates
• Highly reactive; ship under nitrogen atmosphere with stabilizer documentation