Tetrazole API Intermediate from Canada
Tetrazole contains four nitrogen atoms in a five-membered aromatic ring, classified as nitrogen heterocycle only under HTS 2933.99.82. Critical for sartans blood pressure medications.
Duty Rate — Canada → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• ANDA documentation for generic APIs; stability under acid conditions; explosive hazard declarations