1-(2-Pyridylazo)-2-naphthol, PAN,Reagent, Pyridylazonaphthol, O-PAN, PAN, Hpan, 2-hydroxy-1-(2-pyridylazo)naphthalene, 1-(2-pyridylazo)-2-hydroxynaphthalene, PAN INDICATOR, 2-(2-hydroxynaphth-1-ylazo)pyridine, PAN,REAGENT,ACS, PanIndicatorGr, PAN-2, 1-(2'-pyridylazo)-2-naphthol