CAS 137049-00-4 appears in our catalog under these names: 1-Methylimidazole-4-sulfonyl chloride, 97%, 1-Methyl-1H-imidazole-4-sulfonyl Chloride, 1-Methyl-1H-imidazole-4-sulfonyl chloride, 97%, 1-Methyl-1H-imidazole-4-sulfonyl chloride, 95% , 1-Methyl-1H-imidazole-4-sulfonyl chloride 98%. Offered by: Fluorochem, TRC, Combi-blocks, Thermo Scientific, Ambeed. Available pack sizes: 1g, 5g, 10g, 25g, 100mg, 500mg, 100g, 250MG.