Flucytosine API from Mexico
Flucytosine is a fluorinated pyrimidine analog used as an antifungal agent, featuring a pyrimidine ring with nitrogen hetero-atoms only. Classified under HTS 2933.59.95.00 for other pyrimidine ring compounds not specified elsewhere. Its chemical definition fits Chapter 29 restrictions for separate organic compounds.
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
• Submit FDA Drug Master File (DMF) references; misdeclaration as generic chemical leads to penalties
• Verify fluorine substitution doesn't trigger Chapter 28 inorganic classification
• Avoid mixing with excipients; pure form only for this HTS