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
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals Annex IV: 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
• 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