Biphenyl-4,4'-dicarboxylic Acid from Mexico
BPDA provides extended conjugation for high-performance polymers in displays and films. Classified HTS 2917.39.70.00 aromatic polycarboxylic despite extended system. Enables liquid crystalline behavior.
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
• Extended aromatic confirmed single benzene-per-carboxyl unit
• Display manufacturers need angular light scattering for purity
• Molecular weight analysis prevents Chapter 39 prepolymer confusion