CAS 657414-80-7 appears in our catalog under these names: 4–(3–Methyl–1H–imidazol–3–ium–1–yl)butane–1–sulfonate trifluoromethanesulfonate, 1-Methyl-3-(4-sulfobutyl)-1H-imidazol-3-ium trifluoromethanesulfonate, 98%, 98%, 4-(3-Methyl-1H-imidazol-3-ium-1-yl)butane-1-sulfonate trifluoromethanesulfonate, 98%, 1-Methyl-3-(4-sulfobutyl)-1H-imidazol-3-ium trifluoromethanesulfonate, 97%. Offered by: GLPBio, Chemat, Fluorochem, Ambeed. Available pack sizes: 25g, 1g, 5g, 100g, 500g.