CAS 13656-52-5 appears in our catalog under these names: 4,5-Dichloro-2-fluorobenzenesulphonyl chloride, 98%, 4,5-Dichloro-2-fluorobenzenesulphonyl chloride, 4,5-Dichloro-2-fluorobenzene-1-sulfonyl chloride, 98%, 4,5-DICHLORO-2-FLUOROBENZENESULFONYL CHLORIDE, 98%. Offered by: Combi-blocks, Biosynth, Ambeed, Chemat, BLDpharm. Available pack sizes: 1g, 10g, 25g, 5g, 250mg.