Sulfapyridine from Mexico
Sulfapyridine, one of the earliest synthetic sulfonamides, is used in dermatological treatments particularly for dermatitis herpetiformis and as a component in dapsone alternatives. HTS 2935.90.60.00 applies as a classic sulfonamide drug structure with pharmaceutical applications. It exemplifies the chemically defined organic compounds covered by Chapter 29 heading 2935.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide clinical indication documentation as niche therapeutic use may trigger additional FDA scrutiny
• Ensure proper polymorphic form certification as sulfapyridine exhibits multiple crystal forms affecting bioavailability
• Declare exact CAS number (144-83-2) on commercial invoice for accurate HTS verification