Metrizoic Acid from Mexico
Metrizoic acid, or 3-acetamido-2,4,6-triiodo-5-(N-methylacetamido)benzoic acid, serves as a precursor for water-soluble contrast agents in medical imaging. It is specifically named in HTS 2924.29.0500 for its aromatic cyclic amide structure under carboxyamide-function compounds. This pure organic compound aligns with chapter notes for separate chemically defined substances.
Duty Rate — Mexico → United States
15.3%
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 TSCA certification for US entry and detailed purity assays; common issue is misdeclaration as a hormone per note 2937
• Partner with specialized chemical freight forwarders