Remifentanil Hydrochloride from Mexico
Remifentanil hydrochloride, a fentanyl derivative featuring a piperidine ring with ester oxygen functions and pyridine-related nitrogen heterocycle, is an ultra-short-acting opioid. HTS 2933.34.00.00 covers it as an other fentanyl derivative, classified by its last-occurring heterocyclic heading per chapter notes. Imported as bulk chemical for IV anesthetic production.
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
• Comply with ester classification rules in note 3(A) by documenting parent acid functions; ensure anti-dusting agents don't imply specific use per note (g); audit shipments for quota adherence to avoid penalties