CAS 209518-16-1 appears in our catalog under these names: MADB, MADB Robiot 98%, Sodium 4,4'-((3,5-dimethylphenyl)azanediyl)bis(butane-1-sulfonate), 98%, 98%, Sodium 4,4'-((3,5-dimethylphenyl)azanediyl)bis(butane-1-sulfonate), 98%. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 1g, 250mg, 5g, 100mg.