(4-cyanophenyl) methane sulfonyl chloride can be used as an intermediate in pharmaceutical synthesis, mainly in laboratory research and development processes and chemical pharmaceutical synthesis processes. Sulfonyl chloride is an important intermediate and raw material for organic and pharmaceutical synthesis, which can be used to synthesize drug molecules with sulfonyl groups. Sulfonyl chloride can react with amines to obtain sulfonamides, which are the active structural units of many drugs.