4,4'-Bis(α,α-dimethylbenzyl)diphenylamine from Canada
This is a specific aromatic diphenylamine derivative used primarily as an antioxidant and stabilizer in rubber and polymer production. It falls under HTS 2921.44.0500 as it is explicitly named in the tariff heading for diphenylamine derivatives. The compound's structure features two α,α-dimethylbenzyl groups attached to the 4,4' positions of diphenylamine, providing steric hindrance for effective stabilization.
Duty Rate — Canada → United States
Rate breakdown
Import Tips
• Provide detailed chemical analysis certificates (COA) confirming purity and structure matching the exact tariff description to avoid misclassification
• Ensure proper Hazard Communication labeling per GHS as it's a chemical substance requiring SDS documentation for customs clearance
• Verify REACH compliance if sourcing from EU; common pitfall is incomplete impurity declarations affecting Chapter 29 eligibility