4,4'-Diamino-3,3'-dimethylbiphenyl from China
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 — China → United States
44%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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