Ethyl 2-(2-aminothiazol-4-yl)-2-methoxyiminoacetate from Mexico
Key pharmaceutical intermediate with aminothiazole ring explicitly named in HTS 2934.10.70.00. Used in synthesis of third-generation cephalosporin antibiotics like cefotaxime. Qualifies as chemically defined thiazole heterocyclic under Chapter 29 notes.
Duty Rate — Mexico → United States
10%
Rate breakdown
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
• Provide synthetic pathway documentation linking to FDA-approved pharmaceuticals
• Include stability data for methoxyimino group during transport to prevent degradation claims
• Declare as pharmaceutical intermediate to qualify for potential duty exemptions or FTZs