8-Bromotheophylline from Mexico
8-Bromotheophylline serves as a pharmaceutical intermediate with halogenated xanthine structure, nitrogen heterocyclic only per chapter notes. Included in U.S. note 3 products for 2933.99.79.00. Used in synthesis of bronchodilators.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals Annex IV: 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
• Declare halogen content and provide halide analysis to confirm structure
• Use secondary containment packaging due to lachrymatory properties
• Include downstream synthesis declaration to qualify for intermediate status