Lactam (Beta-Propiolactam) from Canada
Beta-propiolactam is a strained four-membered ring acyclic lactam amide used in polymer production like nylon precursors. Despite ring structure, classifies as acyclic amide derivative under HTS 2924.19.11. Chemically defined per chapter notes excluding certain heterocycles.
Duty Rate — Canada → United States
3.7%
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
• Handle as CMR substance with UN 3386 labeling; obtain prior EPA approval for TSCA import; test for ring-opening impurities affecting purity classification