Pteridine Powder from Mexico
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 — Mexico → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• UV-Vis spectrum confirming pteridine chromophore
• Vitamin intermediate status requires FDA GRAS documentation
• Oxidation-sensitive; nitrogen purged packaging mandatory