Levorphanol (S)-Tartrate Dihydrate from Mexico
The dihydrate form of (S)-levorphanol tartrate maintains the core isoquinoline opioid structure with added water crystallization. HTS 2933.41.00.00 classification holds as salt of specified INN, with hydration not affecting Chapter 29 organic compound status. Bulk import for sterile injectable opioid production.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%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
• Document water content via Karl Fischer titration; validate chiral purity (>99% S-enantiomer)
• Separate from free base shipments to maintain salt HTS specificity