Sulfanilamide from Canada
Sulfanilamide is the parent compound of the sulfonamide class of antibiotics, historically significant as the first synthetic antibacterial drug. It classifies under HTS 2935.90.60.00 as a chemically defined sulfonamide with established pharmaceutical applications. The simple p-aminobenzenesulfonamide structure defines the entire sulfonamide therapeutic class.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include reference to historical USP monograph even for research quantities
• Document intended research/pharmaceutical use to distinguish from dye intermediates
• Verify absence of heavy metals per current pharmacopeial standards