Homogentisic Acid from Mexico
Homogentisic acid (2,5-dihydroxyphenylacetic acid) has carboxylic acid on side chain rather than directly on ring. Still qualifies under HTS 2918.19.20.00 per note 3 for aromatic compounds with alcohol function. Important in metabolic disorder research (alkaptonuria).
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
• Side-chain COOH; confirm aromatic ring substitution pattern for classification
• Medical research use; include IRB protocol if for human studies
• Unstable in air; import temperature-controlled with stability data