... -Phenanthroline; 4,5-Diazaphenanthrene; beta-Phenanthroline; Phenanthroline; 1,10-Fenanthrolin; Orthophenanthroline; 1,10-Fenantrolina; 1,10-Phénanthroline; DERIVATION CLASSIFICATIONPHYSICAL AND CHEMICAL PROPERTIESPHYSICAL STATEwhite crystalline powderMELTING ... are three isomeric phenanthrolines of which names indicate nitrogen positions; 1,7- ,1,10- , and 4,7-. Phenanthroline is a metal chelator. ...