1-Propanesulfonic acid, 3-((4-((5-bromo-2-pyridinyl)azo)-3-hydroxyphenyl)propylamino)- 2-(5-Bromo-2-pyridylazo)-5-(N-n-propyl-N-3-sulfopropylamino)phenol 5-Br-Paps 81608-06-2