</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

Lactam (Beta-Propiolactam) from Mexico

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 — Mexico → United States

13.7%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

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