Isoquinoline from Mexico
Isoquinoline is a bicyclic aromatic heterocycle used in alkaloid synthesis and as a solvent in organic reactions. Classified under HTS 2934.99.44.00 as other aromatic heterocyclic. Precursor for papaverine and other isoquinoline alkaloids.
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
• CAS 119-65-3 and boiling point (243°C) data confirms identity
• Handle as flammable liquid per DOT regulations
• Purity >99% required for chemically defined classification