4-Dimethylaminopyridine (DMAP) (CAS 1122-58-3) from Canada
DMAP is a highly efficient nucleophilic catalyst used in esterification and acylation reactions, featuring a pyridine ring with dimethylamino substitution. Its primary classification follows the pyridine ring per Chapter 29 numerical order rule. HTS 2933.31.00.00 covers this compound.
Duty Rate — Canada → United States
10%
Rate breakdown
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
• Highly toxic - requires specific hazard communication training docs
• Import under research chemical exemption if small quantities
• Confirm >99% purity to maintain single compound status