Benzenesulfonyl chloride appears as a colorless to slightly yellow solid that melts at approximately 40°F. Very irritating to skin, eyes and mucous membranes. May emit toxic fumes when heated to high temperatures. Used to make dyes and other chemicals.

Key intermediate in organic synthesis, used for the preparation of benzenesulfonamides, sulfonates and sulfones.

Pharmaceutical field: Synthesis of drugs such as sulfacetamide, thiamphenicol and chloramine-T.

Used in the synthesis of dyes, pesticides and additives, as well as the identification and protection of amine compounds.

Acts as a sulfonating and chlorinating agent in organic synthesis.