Phenprobamate from Mexico
Phenprobamate is an aromatic cyclic carbamate (ureine derivative) used as a muscle relaxant and anxiolytic medication. Classified under HTS 2924.21.20.00 as it matches products in additional U.S. note 3 to section VI for regulated cyclic amides. Its carboxyamide-function carbonic acid structure fits the heading's chemical definition.
Duty Rate — Mexico → United States
16.5%
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
• Require DEA import permit if scheduled as controlled substance; verify current status before shipment
• Provide pharmacopeia reference standards to confirm purity meets note 3 specifications
• Avoid bulk packaging that could imply industrial use, risking reclassification outside pharmaceutical context