4-Dimethylaminopyridine (DMAP) from China
4-Dimethylaminopyridine (DMAP) is a pyridine catalyst with an unfused ring, widely used in organic synthesis for acyl transfer reactions. HTS 2933.39.61 applies via additional U.S. note 3 to section VI for listed pyridine derivatives. Essential lab reagent for peptide manufacturing.
Duty Rate — China → United States
19%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide peer-reviewed references confirming catalytic use to avoid reagent misclassification
• Small package quantities (<1kg) may qualify for de minimis entry; aggregate carefully
• Include GHS labels meeting OSHA HazCom standards on all containers