NTP N-Cyclohexylthiophthalimide for Tire Manufacturing from Japan
NTP, or N-Cyclohexylthiophthalimide, is a specialty organo-sulfur accelerator used in tire manufacturing to prevent premature vulcanization and reduce nitrosamine formation. This aromatic compound matches 2930.90.24.00 as it contains sulfur directly linked to carbon atoms, per Chapter 29 notes excluding sulfonated types.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Declare exact CAS number and purity percentage on entry; use licensed customs broker for chemical HTS verification
• Common issue: confusion with Chapter 38 mixtures causing duty disputes