o-Toluenesulfonamide (OTS) from Canada
o-Toluenesulfonamide is a chemically defined organic sulfonamide compound with the formula C7H9NO2S, featuring a sulfonamide group (-SO2NH2) attached to an o-tolyl ring. It falls under HTS 2935.90.1500 as a specific sulfonamide classified within Chapter 29 for separate chemically defined organic compounds. Primarily used as an intermediate in organic synthesis and plasticizers.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6093.5%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
• Verify purity certificate (typically >99%) and provide chemical safety data sheet (SDS) for DOT/REACH compliance during import
• Ensure proper labeling as a sulfonamide per TSCA inventory; avoid misclassification as a mixture which would shift to heading 3824