High-Purity Benzenesulfonyl Chloride 99.5% for Pharma Intermediates from Canada
Ultra-high purity grade used in pharmaceutical synthesis of sulfonamide drugs like sulfamethoxazole. HTS 2904.10.08.00 classification as pure chemically defined sulfonated benzene derivative.
Duty Rate — Canada → United States
15.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Pharma-grade requires GMP-equivalent documentation and full impurity profile
• TSCA certification mandatory; declare intended pharmaceutical intermediate use
• Glass-lined containers preferred to prevent reaction with metal packaging