Ethionamide from China
Ethionamide, a thioamide derivative of pyridine-2-carboxylic acid, treats multidrug-resistant tuberculosis. Falls under HTS 2933.39.41.00 for its unfused pyridine ring and drug classification in Chapter 29. Bulk API form used in pharmaceutical manufacturing.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Sulfur content verification via elemental analysis to confirm thioamide pyridine structure
• Document MDR-TB indication to support drug status versus chemical intermediate
• Odoriferous; include safety data sheets addressing Chapter 29 note (g)