Pteridine Powder from Canada
Pteridine, a fused pyrimido-pyrimidine nitrogen heterocyclic system core to folate and flavin structures. Used in vitamin synthesis; HTS 2933.99.9701 as other nitrogen heterocycles.
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
• UV-Vis spectrum confirming pteridine chromophore
• Vitamin intermediate status requires FDA GRAS documentation
• Oxidation-sensitive; nitrogen purged packaging mandatory