CAS Registry Number

CAS 85-85-8 — 1-(2-Pyridylazo)-2-naphthol

1-(2-Pyridylazo)-2-naphthol (PAN) is a highly sensitive and selective chelating agent widely used in analytical chemistry for the spectrophotometric detection and quantification of metal ions, including calcium, magnesium, and rare earth elements. It forms brightly colored complexes with many metals, enabling precise analytical measurements in laboratories and industrial quality control. This chemical has a CAS number of 85-85-8, a molecular formula of C15H11N3O, and a molecular weight of 249.27 g/mol. It is stable at ambient storage conditions but requires careful handling, as indicated by its "Warning" signal word. Molekula supplies 1-(2-Pyridylazo)-2-naphthol from research to bulk quantities with full documentation and ISO 9001:2015 traceability.