R 3087 (OTTO) Rhodamine 6G, dye content, 99% Cas 989-38-8 - used as a cationic dye to determine the photocatalytic ability of TiO2 reinforced graphene oxide composites that can be potentially used in self-cleaning applications.R 3087 (OTTO) Rhodamine 6G, dye content, 99% Cas 989-38-8 - used to calculate the quantum yield of glutathione-capped copper nanoclusters (CuNCs) for fluorescent thermo-responsive nanomaterials and gold nanoparticles (AuNPs) for fluorescent/X-ray computed tomography.