4,4'-Di-alpha-cumyl Diphenylamine from Germany
This sterically hindered diphenylamine derivative acts as a premium antioxidant for natural and synthetic rubber, extending service life in tires and belts. HTS 2921.44.2000 applies due to its listing in additional U.S. note 3 to section VI, subjecting it to quantitative import restrictions. The cumyl groups provide superior heat aging resistance.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Confirm exact chemical matches U.S. note 3 specifications via molecular weight and NMR data submission
• Coordinate with rubber manufacturers for quota allocation letters
• Common issue: incorrect HS declaration as polymer additive leads to 3824 classification