Diltiazem Hydrochloride from Japan
Diltiazem hydrochloride is a benzothiazepine derivative calcium channel antagonist used for hypertension, angina, and arrhythmias. Its nitrogen-containing heterocyclic structure qualifies it for HTS 2933.99.53.00 as an aromatic cardiovascular drug. Imported typically as bulk API powder for tablet manufacturing.
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
• Provide USP/EP certificate and stability data; impurities must be <0.1% per ICH guidelines
• Use tamper-evident packaging to prevent contamination claims at customs
• Avoid classifying with excipients - pure API only under this code; mixtures go to 3003