Viagra Generic API (Sildenafil Base) from Japan
Pharmaceutical-grade sildenafil base (non-citrate form) for generic erectile dysfunction medications contains unfused pyrazole ring structure under HTS 2933.19.3500. Bulk imported for salt formation and tablet compression.
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
• Differentiate free base from citrate salt with NMR spectra in documentation
• Include particle size distribution for bioavailability equivalence
• Avoid 2925 classification by emphasizing heterocyclic drug function