4-Hydroxy-2-butanone from Mexico
4-Hydroxy-2-butanone is an acyclic ketone-alcohol with the hydroxyl group at the terminal position and ketone at carbon 2. It qualifies under HTS 2914.40.90.00 as a ketone-alcohol not elsewhere specified. Used as a flavor intermediate and polymer precursor.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6095.2%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• For food contact applications, include FDA GRAS status or equivalent documentation
• Monitor for auto-oxidation products; peroxide value testing prevents rejection
• Small package quantities (<1kg) may qualify for research exemption