Glass jar with paper label that reads “Eosin alc. / Dr. G. Grubler & Co. Leipzig.” Eosin is a red fluorescent dye discovered in 1874 by Heinrich Caro, Director of the German chemical company Badische Anilin- und Soda-Fabrik. The name Eosin comes from Eos, the ancient Greek word for 'dawn' and the Greek goddess of the dawn. George Grubler (1850-) was a pharmacist in Leipzig who began making artificial dyes in 1880.
Brown glass bottle with a black screw cap, and a paper label that reads in part “C.I. No. 770 Ethyl Eosin 25 gms / Alcohol Soluble Eosin / Certified for use in: Histology / Pharmaceutical Laboratories / NATIONAL ANILINE DIVISION / ALLIED CHEMICAL & DYE CORPORATION. . .” Eosin is a red fluorescent dye discovered in 1874 by Heinrich Caro, Director of the German chemical company Badische Anilin- und Soda-Fabrik. The name comes from Eos, the ancient Greek word for 'dawn' and the Greek goddess of the dawn. This sample was collected by Richard E. Heller (1908-1998), a surgeon affiliated with the Northwestern University Medical School.