1-(3-Sulfopropyl)-3-methylimidazolium Inner Salt from Canada
A zwitterionic imidazolium compound used in photographic wetting agents and antistatic coatings for film bases. The heterocyclic nitrogen structure provides surface activity essential for processing. Falls under HTS 2933.99.24.00 as a photographic chemical.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals Annex IV: patented pharma articles — 100% 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
• Classify as inner salt per Chapter 29 organic salt provisions; provide zwitterion structure confirmation; ensure surfactant performance specifications