Purine Base from Mexico
Purine (7H-imidazo[4,5-d]pyrimidine), the parent bicyclic nitrogen heterocycle of DNA/RNA bases. HTS 2933.99.9701 for unspecified nitrogen hetero-atom compounds used in biotech.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• NMR confirming unsubstituted purine; nucleosides go to 2934
• Biotech end-use statement prevents pharmaceutical reclassification
• RNase-free certification for molecular biology grade