Sulfanilamide Powder USP from Canada
Sulfanilamide, the parent compound of all sulfonamides, provides broad-spectrum antibacterial activity. HTS 2935.90.4800 classification as prototypical sulfonamide anti-infective per Chapter 29(a). Still used topically in vaginal infections and experimentally.
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
• USP monograph compliance mandatory; aniline impurities strictly controlled
• Topical vs systemic documentation prevents dosage form confusion
• Historical FDA approvals support continued import legitimacy