CAS 20691-84-3 appears in our catalog under these names: Benzoic acid, 3-[2-[4-(dimethylamino)phenyl]diazenyl]-, m-Methyl Red, >98.0%(HPLC), m-Methyl red 95%, m-Methyl Red, 95%, 95%, m-Methyl red. Offered by: Fluorochem, TCI, Ambeed, Chemat, MedChemExpress. Available pack sizes: 100g, 1g, 25g, 5g, 5 g, 25 g, 10 g.