Di-tert-butyl Dicarbonate (Boc2O) from Japan
Di-tert-butyl dicarbonate (Boc anhydride) is a protecting agent for amines in peptide synthesis, classified under HTS 2942.00.50.00 as 'other' organic compounds. This mixed anhydride features carbonate and carboxylate functionalities.
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
• Maintain storage below 25°C; include accelerated stability data for 6-month shelf life
• CAS 24424-99-5 and exact purity (>99%) must appear on all documentation
• Avoid classification confusion with pharmaceutical finished forms under Chapter 30