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2935.90.48.00/Sulfamethoxazole USP/Mexico

Sulfamethoxazole USP from Mexico

Sulfamethoxazole is a synthetic bacteriostatic sulfonamide antibiotic used primarily as an anti-infective agent against gram-positive and gram-negative bacteria. It falls under HTS 2935.90.4800 as a sulfonamide classified as an anti-infective drug, typically used in combination therapies like co-trimoxazole. This chemically defined organic compound meets Chapter 29 note (a) for separate sulfonamides.

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)
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Import Tips

• Provide FDA Drug Master File (DMF) and Certificate of Analysis confirming USP purity and anti-infective pharmacological action

• Include detailed chemical structure documentation to verify sulfonamide classification under Chapter 29 notes

• Avoid misclassification as finished dosage forms; ensure import as bulk API only to prevent Chapter 30 reclassification