Pharmaceutical Grade Acetylsulfisoxazole API from Canada
High-purity acetylsulfisoxazole active pharmaceutical ingredient (API) specifically enumerated in HTS 2935.90.32.00 as a sulfonamide anti-infective drug. Used exclusively in manufacturing prescription medications for systemic bacterial infections.
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
• Register as API importer with FDA and maintain DMF confidentiality
• Batch testing required; provide chromatograms showing single impurity <0.1%
• Declare specifically by name to avoid general sulfonamide classification