4-Aminopyridine from Canada
4-Aminopyridine is a pyridine derivative used as a potassium channel blocker in multiple sclerosis treatment (dalfampridine). It qualifies for HTS 2933.39.41.00 as a drug containing an unfused pyridine ring, meeting Chapter 29 criteria for nitrogen-heterocyclic compounds. Pharmaceutical grade material supports neurological therapeutic applications.
Duty Rate — Canada → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide FDA Investigational New Drug (IND) documentation and synthetic route confirming pyridine structure
• Include stability data showing no degradation to non-heterocyclic amines during transport
• Declare as bulk API only; formulated products go to Chapter 30