Biphenyl-4,4'-dicarboxylic Acid from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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