1-(2-Pyridylazo)-2-hydroxynaphthalene 1-(2-Pyridylazo)-2-naphthol 2-Hydroxy-1-(2-pyridylazo)naphthalene 2-Naphthalenol, 1-(2-pyridinylazo)- 2-Naphthol, 1-(2-pyridylazo)- 85-85-8 NSC5332 PAN PAN (indicator)