Succinimide from Japan
Succinimide is a cyclic imide (lactam) with a five-membered heterocyclic ring containing nitrogen, derived from succinic anhydride, and considered aromatic or modified aromatic in context. It is classified under HTS 2933.79.1500 as an other aromatic/modified aromatic lactam used in pharmaceutical intermediates like antiseizure drugs. Chapter notes confirm classification for chemically defined nitrogen-heterocyclic lactams.
Duty Rate — Japan → United States
15%
Rate breakdown
9903.04.628.5%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Include CAS registry data (123-56-8) in import docs for verification; ensure no added solvents beyond transport per note (e)
• Pitfall: bulk imports mistaken for chapter 29 exclusions like urea salts