4-Bromo-2-methylbenzenesulfonyl chloride（Cat No.:R026254）is an aromatic sulfonyl chloride derivative featuring a bromine atom at the para position and a methyl group at the ortho position of the benzene ring. The sulfonyl chloride functional group is highly reactive, making this compound a valuable intermediate in organic synthesis, particularly in the preparation of sulfonamides, sulfonate esters, and other sulfur-containing compounds. It is widely used in medicinal chemistry, agrochemical development, and materials science. The bromine atom also allows for further functionalization via cross-coupling reactions, expanding its utility in complex molecule construction.