4-Hydroxyphenylglyoxylic Acid from Mexico
4-Hydroxyphenylglyoxylic acid contains an aromatic ring with hydroxy and alpha-keto acid (glyoxylic) functions, fitting ketone with additional oxygen. HTS 2918.30.3000 covers this as 'other' aromatic derivative. Used in fine chemical manufacturing.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%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
• Provide acid value and functional group analysis to confirm carboxylic-ketone priority
• Exclude from Chapter 29 if dissolved for specific use beyond transport, per note (e)
• Verify no enzyme activity, excluded to 3507