High-Purity Benzenesulfonyl Chloride 99.5% for Pharma Intermediates from Japan

High-purity benzenesulfonyl chloride at 99.5% is a chemically defined sulfonated derivative of benzene, used in pharmaceutical synthesis of sulfonamide drugs like sulfamethoxazole. It contains only a sulpho group and its chloride form, meeting the scope of tariff item 2904.10.00. The purity level does not affect classification as long as it remains a separate chemically defined compound.