Quinoxaline from China
Quinoxaline features a benzene ring fused to pyrazine, used in organic electronics and antibiotic synthesis. Classified under HTS 2934.99.44.00 as aromatic heterocyclic compound. Exhibits biological activity against mycobacteria.
Duty Rate — China → United States
112.5%
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
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• CAS 91-19-0 documentation essential for positive identification
• Sublimes at 119°C - specify temperature-controlled shipping
• Declare OLED/organic semiconductor applications if applicable