Pharmaceutical Lidocaine HCL Monohydrate from Mexico
Lidocaine hydrochloride monohydrate USP/EP grade, containing one water molecule per API unit, used in sustained-release formulations. Specific HTS 2924.29.57.00 classification for this aromatic amide salt per Chapter 29 note on organic salts. White crystalline powder soluble in water for aqueous injections.
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 (4.7-5.5%) via Karl Fischer titration to confirm monohydrate form vs anhydrous
• Provide polymorphic form characterization (DSC/XRD) if patent-protected to avoid infringement issues
• Maintain humidity-controlled packaging (<40% RH) during ocean freight to prevent hydrate conversion