4-Dimethylaminopyridine (DMAP) from Canada
DMAP is a pyridine derivative serving as a nucleophilic catalyst in organic synthesis and peptide coupling reactions. Classified under HTS 2933.39.61.91 for its unfused pyridine ring and status as a controlled research chemical under U.S. note 3. Meets chapter 29 criteria as a separate chemically defined compound without excluded additives.
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 Safety Data Sheet (SDS) detailing hazards (corrosive, toxic) and proper UN packaging
• Verify end-use declaration to avoid anti-dumping scrutiny on research chemicals
• Check state-level chemical handling permits beyond federal HTS requirements