Pteridine from Japan
Pteridine is a fused heterocyclic system containing pyrimidine and pyrazine rings, essential for biochemical research and vitamin synthesis. Classified under HTS 2934.99.44.00 as an aromatic heterocyclic compound not elsewhere specified. Used in folate and flavin coenzyme production.
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
• Include NMR or HPLC analysis confirming aromatic heterocyclic structure for customs classification
• Declare intended research use to avoid pharmaceutical classification under Chapter 30
• Package with stabilizers if required for air transport per chapter note 2(f)