CAS 55854-45-0 appears in our catalog under these names: 5-Methylthiophene-2-sulfonyl chloride, 95%, 5-Methylthiophene-2-sulfonyl chloride, 95% . Offered by: Combi-blocks, AmBeed, Thermo Scientific, BLDpharm, Fluorochem. Available pack sizes: 1g, 10g, 25g, 5g, 100g.