Homophthalic Acid from Canada
Homophthalic acid is a cyclic aromatic monocarboxylic acid used in organic synthesis and pharmaceutical intermediates. Falls under HTS 2916.39.79.00 as 'other' aromatic acid. Chemically defined structure meets chapter requirements.
Duty Rate — Canada → United States
110%
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
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include NMR/GC purity certificates for research chemical imports
• Declare intended synthesis use to avoid controlled precursor scrutiny
• Ensure no metal salts; coordination compounds classify differently per notes