CAS 97272-04-3 appears in our catalog under these names: 2,5-Dimethyl-3-thiophenesulfonyl chloride, 95%, 2,5-Dimethyl-3-thiophenesulfonyl chloride, 97% , 2,5-Dimethylthiophene-3-sulfonyl chloride 95+%, 2,5-Dimethylthiophene-3-sulfonyl chloride, 95%. Offered by: Combi-blocks, Thermo Scientific, Ambeed, Fluorochem. Available pack sizes: 250mg, 5g, 1g, 10g.