CAS 366453-21-6 appears in our catalog under these names: 4-Hydroxyisoindolin-1-one 95%, 4-Hydroxy-2,3-dihydroisoindol-1-one, 95%, 95%, 4-Hydroxy-2,3-dihydroisoindol-1-one, 97%. Offered by: Ambeed, Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 5g, 10g, 25g.