4,4'-Di-alpha-cumyl Diphenylamine from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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