CAS 518057-63-1 appears in our catalog under these names: 4-Bromo-3,5-difluorobenzenesulfonyl chloride, 98%, 4-Bromo-3,5-difluorobenzenesulfonyl chloride, 4-Bromo-3,5-difluorobenzene-1-sulfonyl chloride 97%, 4-Bromo-3,5-difluorobenzenesulfonyl chloride, 95%. Offered by: Combi-blocks, Biosynth, Ambeed, Fluorochem. Available pack sizes: 1g, 10g, 25g, 5g, 10000mg, 100g.