Thioguanine from Canada
Thioguanine is a guanine analog with thiopurine structure used as antileukemic drug featuring aromatic heterocyclic rings. It qualifies for HTS 2934.99.30.00 classification as a pharmaceutical drug compound.
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
• Document insolubility profile and recommend micronization for bioavailability enhancement
• Provide heavy metals testing results below 10 ppm per USP requirements
• Include anaerobic packaging specifications to prevent oxidation during transit