Pyromellitic Dianhydride (PMDA) from Mexico
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 — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, 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