B 2650 (OTTO) 9-Bromophenanthrene, 97% Cas 573-17-1 - used as halogenated building block. Isotope labelled 9-Bromophenanthrene a halogenated polycyclic aromatic hydrocarbon that has been seen to have a room temperature phosphorescence that can be induced by β-cyclodextrin (β-CD) in the presence of cyclohexane; however, trace Fe(III) causes a decrease of the RTP emission.