Imidazole-4-Carboxylic Acid from Mexico
Imidazole-4-carboxylic acid is a key intermediate for pharmaceutical synthesis, featuring the unfused imidazole ring required by heading 2933. As an aromatic heterocyclic compound listed in additional U.S. note 3, it imports under HTS 2933.29.35.00.
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
• Include synthesis route and impurity profile for downstream pharma validation
• Ensure proper pH adjustment documentation for carboxylic acid handling
• Label with GHS hazard statements for corrosive organic acid properties