Sulfanilamide from Mexico
Sulfanilamide is the parent compound of all sulfonamide antibiotics, historically significant for treating streptococcal infections. As the simplest sulfonamide not covered by prior specific subheadings, it classifies under HTS 2935.90.95.00.
Duty Rate — Mexico → 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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Research/historical compound; provide synthesis route diagram
• Highly soluble; moisture control critical during transport
• Legacy status may trigger additional documentation requests