... ,5-Diazaphenanthrene; beta-Phenanthroline; Phenanthroline; 1,10-Fenanthrolin; Orthophenanthroline; 1,10-Fenantrolina; 1,10-Phénanthroline; DERIVATION CLASSIFICATIONPHYSICAL AND ... isomeric phenanthrolines of which names indicate nitrogen positions; 1,7- ,1,10- , and 4,7-. Phenanthroline is a ... reagent of choice is a colorless compound called 1,10 phenanthroline. This species has two nitrogen atoms ...