6-Mercaptopurine from Japan
6-Mercaptopurine, a purine analog with thiol substitution used in chemotherapy. Contains only nitrogen hetero-atoms in heterocyclic rings; HTS 2933.99.9701 despite sulfur (not organo-sulfur per note).
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
• Light-sensitive; amber packaging with stability data
• NCI/IMPD documentation for clinical trial material
• Sulfur content analysis to confirm non-organo-sulfur status