2,5-Pyridinedicarboxylic acid from Mexico
2,5-Pyridinedicarboxylic acid (isocinchomeronic acid) is explicitly named under HTS 2933.39.20.00. Used in coordination polymers, metal-organic frameworks, and pharmaceutical intermediates.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6094.2%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 titration analysis confirming dicarboxylic acid purity
• Use HDPE containers resistant to carboxylic acid corrosion
• Include research chemical end-use statements for university imports