Benzene-1,2,3-tricarboxylic Acid (Hemicellic Acid) from Mexico
Hemicellic acid is a tri-carboxylic aromatic acid used in resin synthesis and as a pharmaceutical intermediate. It falls under HTS 2917.39.70.00 as an aromatic polycarboxylic acid not otherwise specified. The 1,2,3-substitution pattern gives unique reactivity.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• NMR/GC-MS analysis required to confirm isomer position distinguishing from trimellitic
• Pharma intermediate shipments need DMF filing status documentation
• Avoid Chapter 29 heading 2924 if primary amine function predominates structure