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Corey-Kim Reagent Intermediate (N-Chlorosuccinimide) from Japan

N-Chlorosuccinimide (NCS) is a chlorinating and oxidizing agent used in the Corey-Kim reaction, classified under HTS 2942.00.50.00. This N-haloimide features a succinimide ring with active chlorine.

Duty Rate — Japan → United States

15%

Rate breakdown

9903.04.6211.3%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

Available chlorine content (≥98%) certification required on CoA

Light-sensitive; amber packaging with <1% decomposition after 12 months data

Distinguish from swimming pool chemicals through purity and end-use declaration