Idoxuridine Crystals from Mexico
Idoxuridine is a halogenated pyrimidine nucleoside antiviral with nitrogen-only heteroatoms in the ring structure. It qualifies for HTS 2933.59.95.00 as an 'other' pyrimidine compound under Chapter 29 for chemically defined heterocycles. Used in ophthalmic formulations but imported as pure API.
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
• Include spectral analysis confirming pyrimidine ring; halogen derivatives stay in Chapter 29
• Comply with biohazard labeling if antiviral activity noted