Naproxen Base from Mexico
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 — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
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