Sildenafil Citrate API from China
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 — China → United States
31.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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