Naproxen Base from Japan
Naproxen is an NSAID used for pain relief, fever reduction, and inflammation, classified in HTS 2933.99.55 due to its aromatic heterocyclic nitrogen-containing structure. As a bulk pharmaceutical API primarily affecting the CNS, it meets the heading for analgesics and antipyretics.
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
• Submit detailed spectral analysis proving aromatic heterocyclic nitrogen hetero-atom(s) for classification
• Include stability data as stabilizer additions are allowed per chapter note (f) without reclassification
• Watch for pitfalls in ester forms, which classify with the acid per chapter note on esters