4,4'-Diamino-3,3'-dimethylbiphenyl from Canada
This biphenyl-based aromatic polyamine functions as an intermediate for high-performance polymers and dyes. HTS 2921.59.4000 applies as it is described among products in additional U.S. note 3 to section VI.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Use HPLC chromatograms to demonstrate single compound status
• Confirm no metal coordination that would invoke special salt classification rules
• Separate from diaminodiphenylmethane shipments due to structural differences