1,10-Phenanthroline ferrous sulfate 14634-91-4 14708-99-7 EINECS 238-676-6 Iron(2+), tris(1,10-phenanthroline-kappaN1,kappaN10)-, (OC-6-11)-, sulfate (1:1) Iron(2++), tris(1,10-phenanthroline-N1,N19)-, (OC-6-11)-, sulfate (1:1) Tris(1,10-phenanthroline-N1,N10)iron sulphate