4-Methylthiazole from Mexico
4-Methylthiazole is a simple alkyl-substituted thiazole used in flavor and fragrance applications and as a pharmaceutical intermediate. Classified under HTS 2934.10.90.00 as an 'other' unfused thiazole ring compound meeting Chapter 29 requirements for chemically defined heterocycles. The methyl substitution does not alter its primary thiazole classification.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Declare intended use (flavor vs pharmaceutical) on entry documents as this affects potential FDA oversight
• Provide GC-MS analysis verifying structure and isomer purity to distinguish from 2- or 5-methylthiazole isomers
• Ship in amber glass bottles to prevent light-induced degradation, with COA included in shipment