N-Cyclohexylthiophthalimide (NTP) Rubber Accelerator from Japan
N-Cyclohexylthiophthalimide is an aromatic organo-sulfur compound used primarily as a rubber accelerator and vulcanization retarder in tire and rubber manufacturing. It features a phthalimide ring with a cyclohexyl group and sulfur linkage, fitting Chapter 29 note for organo-sulfur compounds where sulfur is directly linked to carbon. Classified under 2930.90.24.00 as a specific aromatic thiophthalimide derivative.
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
• Verify chemical purity via Certificate of Analysis (CoA) to meet EPA import requirements; ensure SDS includes GHS classifications for hazardous materials handling
• Common pitfall: misdeclaring as general rubber chemical under 3812, leading to audits