Pyridine-4-Carboxylic Acid from Mexico
Pyridine-4-carboxylic acid (isonicotinic acid) is a key intermediate with an unfused pyridine ring used in synthesizing pharmaceuticals like isoniazid. It falls under HTS 2933.39.61 as specified in additional U.S. note 3 to section VI. Primarily imported for fine chemical synthesis.
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
• Include synthesis route and end-use declaration to qualify for intermediate status
• Monitor for REACH compliance if transshipping through EU; provide safety data sheets
• Package under inert atmosphere to prevent oxidation during ocean transit