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
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Heterocycles scrutinized for Chapter 29 Note 5; provide NMR confirming keto tautomer
• Antibiotic intermediates face additional FDA scrutiny