2-Mercaptobenzothiazole (MBT) from Canada
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 — Canada → United States
110%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
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