Fencholic Acid from Mexico
Fencholic acid is a bicyclic monocarboxylic acid from fenchone oxidation, used in terpene chemistry research. Classified under HTS 2916.20.50.00 as 'other' cyclanic monocarboxylic acids. Its saturated cyclanic structure matches the heading precisely.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6096.3%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 analytical certificates confirming monocarboxylic structure; check for REACH compliance if European origin; avoid bulk packaging that suggests industrial mixtures