1-(2-Pyridylazo)-2-naphthol (PAN), an orange colored dye, is commonly used as an acid-base indicator. It can form chelates with metal ions, which makes it a valuable indicator in complexometric titrations. PAN is also a spectrophotometric reagent, which can extract metal chelates into an organic solvent.

1-(2-Pyridylazo)-2-naphthol (PAN), an orange colored dye, is commonly used as an acid-base indicator. It can form chelates with metal ions, which makes it a valuable indicator in complexometric titrations. PAN is also a spectrophotometric reagent, which can extract metal chelates into an organic solvent.

PAN Indicator Solution, 0.3%, 100 mL. For low-level determination of nickel and cobalt by the PAN method. Hach method 8078. 100 mL bottle.

A complexometric indicator is an ionochromic dye that undergoes a definite color change in presence of specific metal ions. 

PAN INDICATOR AR