Sildenafil Citrate API from Japan
Sildenafil citrate, the active ingredient in Viagra, contains a pyrazolo[4,3-d]pyrimidine structure but classifies under unfused pyrazole HTS 2933.19.3500 as a pharmaceutical drug. Used for erectile dysfunction and pulmonary hypertension treatment.
Duty Rate — Japan → 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
• Verify citrate salt formation per note 5(C)(1); provide counterion analysis
• Include polymorph Form I certificate; FDA bioequivalence data required
• Prevent 3004 misclassification with 'Bulk API - Not for Direct Human Use' labeling