Purine Base from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• NMR confirming unsubstituted purine; nucleosides go to 2934
• Biotech end-use statement prevents pharmaceutical reclassification
• RNase-free certification for molecular biology grade