1,10-Phenanthrolinedisulfonic acid, 4,7-diphenyl- 28061-20-3 4,7-Diphenyl-1,10-phenanthrolinedisulfonic acid 4,7-Phenylsulfonyl-1,10-phenanthroline 52746-49-3 Bathophenanthrolin-bisulfonsaure [German] Bathophenanthroline disulfonate Bathophenanthroline disulfonic acid