Tartronic Acid from Mexico
Tartronic acid (2-hydroxypropanedioic acid) contains both carboxylic acid and alcohol functions without additional oxygen groups, qualifying for 2918.19.90.00. Used in pharmaceutical intermediates and biochemical research.
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
• Require manufacturer specifications confirming single compound status vs salt forms
• Document research/pharma end-use to justify chapter 29 over chapter 38 classification
• Check for CAS registry verification (80-51-3) in import documentation