Product Overview

PAR, or 4-(2-pyridylazo)resorcinol, is a highly sensitive chromogenic reagent used for the detection and quantification of metal ions in solution. It forms intensely colored complexes—typically red to orange—with a variety of transition metals such as zinc, copper, cobalt, nickel, iron, and lead, enabling their measurement through visible-range spectrophotometry.

PAR is widely used in analytical chemistry, environmental monitoring, and water testing applications due to its strong complexation behavior and distinct color development. It is particularly valuable for trace metal detection in samples requiring high sensitivity and precision.

Key Features:

• Forms colored complexes with numerous metal ions
• Color change is easily measured by spectrophotometry
• High sensitivity allows for detection at low concentrations
• Soluble in aqueous and alcoholic solvents
• Available in powder form for customizable reagent preparation

Applications:

• Spectrophotometric determination of transition metals
• Water quality analysis and trace metal monitoring
• Complexometric titrations in chemical laboratories
• Environmental testing for heavy metals
• Instructional use in coordination chemistry experiments

PAR provides a rapid, reliable means of detecting and quantifying metal ions, making it a powerful tool in analytical laboratories focused on precision metal analysis.