High-Purity N-Cyclohexylthiophthalimide for Synthetic Rubber from Canada
This high-purity grade of N-Cyclohexylthiophthalimide serves as a nitrosamine inhibitor and retarder in synthetic rubber compounding, particularly for automotive tires. As an aromatic organo-sulfur compound with sulfur directly bonded to carbon in the thiophthalimide structure, it complies with Chapter 29 definitions excluding sulfonated derivatives. Specific subheading 2930.90.24.00 covers this exact chemical entity.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include REACH-like compliance docs if from EU; label with CAS# 17796-82-6 for CBP verification
• Avoid pitfall: declaring under bulk rubber additives (4002) which applies only to polymers, not pure chemicals