Sulfamethazine from Mexico
Sulfamethazine is a sulfonamide antibiotic with a heterocyclic pyrimidine ring, used in veterinary medicine for bacterial infections in livestock. Classified under HTS 2933.59.36.00 due to its aromatic structure and role as an anti-infective agent per chapter notes on nitrogen hetero-atom compounds. It qualifies as a separate chemically defined organic compound.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Include veterinary drug import permit from USDA; test for residue limits if for food animals; document aromatic modification to prevent reclassification