Alfentanil Hydrochloride from Mexico
Alfentanil hydrochloride is a short-acting synthetic opioid fentanyl derivative, chemically defined and classified under HTS 2934.92.00.00. It features a modified piperidine structure, fitting chapter 29's heterocyclic compounds scope.
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
• Provide INN certificates and stability studies; use temperature-controlled shipping to prevent degradation
• Watch for misclassification as non-derivative opioids leading to wrong duties