CAS 19040-62-1 appears in our catalog under these names: 2,5-Dimethylbenzene-1-sulfonyl chloride, 98%, 98%, 2,5-Dimethylbenzenesulfonyl chloride, 98%, 2,5–Dimethylbenzenesulfonyl chloride, p-Xylene-2-sulfonyl Chloride, >98.0%(T), 2,5-Dimethylbenzenesulfonyl chloride, 97% . Offered by: Chemat, Combi-blocks, GLPBio, TCI, Thermo Scientific. Available pack sizes: 5g, 10g, 25g, 1g, 100g.