Auramine O dyes [ Molecular Formula ]: C17H22ClN3 [ Colour Index ]: C. I. Basic Yellow ... [Cas No].2465-27-2 [ Synonym ]:4,4-(Imidocarbonyl)bis(N, N-dimethylaniline) monohydrochloride [Molecular Weight]:321.84 [Colour Index Number ]:61200 ... [ Use ]: Dyeing for Paper, Silk, Nylon, hemp etc. Fabric. Auramine O is a yellow fluorescent dye; very soluble in water, soluble ...