Diflunisal from China
Diflunisal is a difluorophenyl derivative of salicylic acid, NSAID with carboxylic acid and phenolic oxygen functions. Pure aromatic drug classified under HTS 2918.99.3000. Used for arthritis pain relief.
Duty Rate — China → United States
19%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Verify fluoride content via 19F-NMR spectroscopy
• Confirm absence of diflunisal dimer impurities
• Maintain <25°C storage to prevent decarboxylation