Sodium Valproate Precursor Acid from Mexico
Valproic acid serving as direct precursor to sodium valproate for migraine prophylaxis. Classified specifically as valproic acid in HTS 2915.90.14.00, a non-halogenated saturated acyclic monocarboxylic acid.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.6095.8%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
• Cross-reference with salt form imports; validate chain of custody docs
• Common issue: temperature control during shipping to maintain integrity