Sulfapyridine Base from Canada
Sulfapyridine is a historic sulfonamide antibiotic still used in dermatological treatments like dermatitis herpetiformis. Falls under HTS 2935.90.4800 as a chemically defined sulfonamide anti-infective agent per Chapter 29(a). Its continued pharmacological use maintains drug classification despite age.
Duty Rate — Canada → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide current pharmacological literature confirming ongoing anti-infective indications to avoid 'other' classification
• Ensure GMP manufacturing certification; legacy drugs face heightened scrutiny for quality control
• Document absence of heavy metal impurities common in older synthesis routes