Thioguanine from Mexico
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 — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• NCI Investigational Drug Branch clearance if research grade; sulfur odor containment packaging; TPMT genotyping documentation recommended