Isonicotinic Acid Hydrazide (INH) from Mexico
Isonicotinic acid hydrazide (INH), or isoniazid, contains an unfused pyridine ring and serves as a first-line antituberculosis drug API. Classified in HTS 2933.39.61 per additional U.S. note 3 to section VI for specified pyridine compounds. Essential for generic TB treatment manufacturing.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
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
• Secure FDA API registration and WHO prequalification certificates for expedited review
• Maintain cold chain documentation (2-8°C) throughout shipping to preserve efficacy
• Report under WHO Essential Medicines List for potential duty relief programs