CAS 1655-29-4 appears in our catalog under these names: Disodium 1,5-Naphthalenedisulfonate Hydrate, >98.0%(HPLC), Disodium 1,5-Naphthalenedisulfonate, >98.0%(HPLC)(T), Disodium 1,5-naphthalenedisulfonate 98%, NAPHTHALENE-1,5-DISULFONIC ACID, Disodium 1,5-naphthalenedisulfonate, 95%+, 95%+. Offered by: TCI, Ambeed, Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 25g, 500g, 100g, 1000g, 1KG, 50g, 5g.