Industrial Grade N-Cyclohexylthiophthalimide Vulcanization Retarder from Japan
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 — Japan → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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