6-Mercaptopurine from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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