4,4'-Diamino-3,3'-dimethylbiphenyl from Japan
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 — 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
• 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