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
100%
Rate breakdown
9903.04.6096.3%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Provide analytical certificates confirming monocarboxylic structure; check for REACH compliance if European origin; avoid bulk packaging that suggests industrial mixtures