A 2467 (OTTO) Anthracene, for scintillation, 99.5% Cas 120-12-7 - used to study the photodimerization reaction of anthracene in supercritical CO2. A 2467 (OTTO) Anthracene, for scintillation, 99.5% Cas 120-12-7 - used in the production of the red dye alizarin and other dyes.