Sulfisoxazole from Canada
Sulfisoxazole is a short-acting sulfonamide antibiotic effective against urinary tract infections and chlamydia, available as a bulk powder for pharmaceutical formulation. It qualifies for HTS 2935.90.75.00 as a product listed in additional U.S. note 3 to section VI. This chemical is a separate, chemically defined organic sulfonamide compound.
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
• Provide impurity profile and batch certificates; ensure packaging prevents moisture absorption; declare as API to avoid reclassification as a finished product