Synonyms: Iron(2+),tris(1,10-phenanthroline)-, ion (8CI); Iron(2+),tris(1,10-phenanthroline-N1,N10)-, (OC-6-11)-; Ferroin; Ferroin indicator;Iron(II) tris(1,10-phenanthroline); Tris(1,10-phenanthroline)-iron(II) chelate;Tris(1,10-phenanthroline)iron(2+); Tris(1,10-phenanthroline)iron(2+) ion;Tris(1,10-phenanthroline)iron(II); Tris(1,10-phenanthroline-N,N')-ferrous ion;Tris(o-phenanthroline)iron(2+)