CAS 123847-85-8 appears in our catalog under these names: N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)-benzidine, 99.5%, N,N'-Di(1-naphthyl)-N,N'-diphenylbenzidine, 98% . Offered by: Lumtec, Thermo Scientific (Alfa Aesar). Available pack sizes: 5g, 10g, 1g, 250mg.