Xanthosine Monophosphate (XMP) from Canada
XMP serves as intermediate in guanosine biosynthesis pathways. Classified HTS 2934.99.39.00 per U.S. note 3 for listed heterocyclic nucleic acids.
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
• Include UV absorbance ratios confirming purine structure
• Monitor for IMP conversion during storage; use stabilizers
• Provide GMP manufacturing certification for pharma intermediates