2-Hydroxybutyric Acid from Mexico
This alpha-hydroxy acid contains the required carboxylic-alcohol structure for 2918.19.90.00 classification. Used in polymer synthesis and metabolic studies.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6096%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
• Confirm optical purity if chiral applications to document isomer status
• Provide molecular formula verification (C4H8O3) in COA
• Avoid retail packaging that might trigger chapter 38 classification