Trimethoprim USP Powder from Mexico
Trimethoprim is a synthetic antibacterial agent classified under HTS 2933.59.22.00 as a pyrimidine ring-containing anti-infective drug. This USP-grade powder is used primarily in pharmaceutical formulations for treating bacterial infections in humans and animals. Its aromatic structure and drug function place it specifically in this subcategory.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide FDA Drug Master File and Certificate of Analysis confirming USP purity >99% to avoid reclassification
• Ensure shipments include veterinary or human drug registration docs; mislabeling as feed additive risks detention
• Verify aromatic modification via HPLC certificate to prevent shift to non-aromatic 2933.59.15