Tetrazole API Intermediate from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• ANDA documentation for generic APIs; stability under acid conditions; explosive hazard declarations