CAS 66621-35-0 appears in our catalog under these names: 2-Amino-6-hydroxybenzenesulfonic acid, 95%, 2-Amino-6-hydroxybenzenesulfonic acid, 95+%, 2–Amino–6–hydroxybenzenesulfonic acid. Offered by: Combi-blocks, AmBeed, GLPBio. Available pack sizes: 1g, 250mg, 100mg.