Sildenafil Citrate API from Japan
Sildenafil citrate, the active ingredient in Viagra, contains a pyrazole ring within its heterocyclic structure for erectile dysfunction treatment. Falls under HTS 2933.19.4500 as a pyrazole-containing drug per Chapter 29 chemical classification rules. Supplied as bulk powder for tablet formulation.
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
• Include FDA-approved DMF and polymorphic form specifications; citrate salt must match USP monograph
• Declare exact purity (≥98.5%) and provide HPLC chromatograms confirming pyrazole integrity