PAN is a 1-(2-Pyridylazo)-2-naphthol A.R. commonly used as a colorimetric reagent for various qualitative and quantitative analyses. It has good sensitivity and selectivity, making it an ideal choice for detecting trace levels of various metals in water systems. PAN is available in powder form and can be used in a variety of lab experiments and applications. It is also suitable for use in a variety of fields, including food safety, environmental monitoring, and industrial processes.