CAS 17804-49-8 appears in our catalog under these names: PROCION RED MX-5B, 2,7-Naphthalenedisulfonic acid, 5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2). Offered by: Sigma-Aldrich, Chemat. Available pack sizes: 5G, 1g, 25g, 100g, 500g, 2.5kg.