Naproxen Sodium from Japan

Naproxen sodium is the sodium salt of an aromatic carboxylic acid (2-methoxy-4-(2-methylpropyl)propanoic acid) used as NSAID. Classified in HTS 2918.99.3000 per chapter note C(1) for inorganic salts of organic acid-function compounds following the acid classification. Aromatic structure with oxygen function qualifies.

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%

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Import Tips

• Include stability studies for sodium salt form and pH specifications

• Provide polymorphic form certification (usually Form I)