4-Methyl-3-nitrobenzene-1-sulfonyl chloride (CAS NO.616-83-1), its Synonyms are 3-Nitro-4-methylbenzenesulfonylchloride ; 4-Methyl-3-nitrobenzenesulfonyl chloride ; 3-Nitro-P-Toluenesulfonyl chloride ; 3-Nitro-4-Methyl phenylsulfonyl chloride ; 2-Nitrobenzene-4-sulfonyl chloride ; 4-Methyl-3-nitrobenzene-1-sulphonyl chloride .