Industrial Grade N-Cyclohexylthiophthalimide Vulcanization Retarder from China
Industrial grade N-Cyclohexylthiophthalimide acts as a precise vulcanization retarder in natural rubber processing, controlling cross-linking for enhanced tire durability. Its aromatic structure with organo-sulfur functionality—sulfur directly linked to carbon—qualifies under heading 2930 per chapter notes, specifically named in subheading 2930.90.24.00.
Duty Rate — China → United States
19%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Obtain TSCA certification for US chemical import; package in UN-approved drums to avoid hazmat surcharges
• Pitfall: undervaluing based on bulk weight ignores purity premiums subject to duty