2-Mercaptobenzothiazole (MBT) from China
MBT is a primary rubber accelerator used in acidic and neutral compounding systems, providing good aging properties. As a benzothiazolethiol organo-sulfur compound principally for rubber processing, it falls under HTS 2930.90.92.31 per Chapter 29 definitions.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Provide comparative rheometer curves demonstrating rubber curing performance
• Declare exact mercapto content as impurities affect duty calculation basis
• Confirm not for copper fungicide use to avoid Chapter 38 reclassification