2922.39.50.00/1-(2-Aminothiazol-4-yl)ethan-1-one/Mexico

1-(2-Aminothiazol-4-yl)ethan-1-one from Mexico

1-(2-Aminothiazol-4-yl)ethan-1-one contains heterocyclic thiazole but classifies as amino-ketone under HTS 2922.39.5000 when oxygen function predominates over heterocycle. Antibiotic intermediate.

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)

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Import Tips

• Heterocycles scrutinized for Chapter 29 Note 5; provide NMR confirming keto tautomer

• Antibiotic intermediates face additional FDA scrutiny