Thioguanine from Japan
Thioguanine (6-TG) is a guanine analog chemotherapy drug containing fused purine heterocycle with sulfur substitution, used for acute myeloid leukemia. Classified HTS 2934.99.4700 as heterocyclic drug per numerical order rule over organo-sulfur heading 2930. Chemically defined active pharmaceutical ingredient.
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
• NCI Investigational Drug Branch clearance if research grade; sulfur odor containment packaging; TPMT genotyping documentation recommended