Homogentisic Acid from Mexico
Homogentisic acid (2,5-dihydroxyphenylacetic acid) is a phenolic acid metabolite used in biochemical research. While technically phenylacetic derivative, classified under HTS 2918.29.7500 for dominant phenolic carboxylic function. Chemically defined structure fits Chapter 29 criteria.
Duty Rate — Mexico → United States
100%
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
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Refrigerated shipping (<8°C) mandatory; provide metabolic pathway documentation; IATA dangerous goods exemption for small quantities