CAS 175278-60-1 appears in our catalog under these names: 3-Amino-4-hydroxy-5-nitrobenzene-1-sulfonic acid hydrate, 95%, 3-Amino-4-hydroxy-5-nitrobenzene-1-sulfonic acid hydrate, 97% . Offered by: Combi-blocks, Thermo Scientific. Available pack sizes: 1g, 10g, 5g, 25g.