Burgess Reagent from Mexico
Burgess reagent (methyl N-(triethylammoniumsulfonyl)carbamate) is used for alkene-forming eliminations, classified under HTS 2942.00.50.00. This inner salt features sulfonamide and carbamate functionalities.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Hygroscopic zwitterion; ship in sealed ampoules with humidity indicators
• Decomposition >180°C; include E2 elimination mechanism literature references
• Avoid confusion with explosive sulfonium salts through NMR characterization