Sulfadiazine Sodium from Mexico
Sulfadiazine sodium is a water-soluble salt form of the sulfonamide antibiotic sulfadiazine, used for treating toxoplasmosis and other bacterial infections. Classified under HTS 2935.90.4800 as a sulfonamide anti-infective drug per Chapter 29 note (C)(1) for inorganic salts of organic compounds. The sodium salt retains the sulfonamide therapeutic classification.
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
• Submit salt formation documentation showing equivalence to parent sulfonamide acid for proper 2935 classification
• Ensure pharmacopeial compliance (USP/EP) certification; common pitfall is classifying as Chapter 28 inorganic salt
• Declare exact purity percentage; impurities >2% may trigger reclassification as chemical mixture