Used as a strong oxidizing titrant in volumetric analysis, particularly in redox titrations for determining the concentration of reducing agents such as iron(II), arsenic(III), and oxalate ions. Commonly employed in analytical chemistry for standardization of other solutions and in the determination of chemical oxygen demand (COD) in environmental testing. Its deep color change during reduction allows for clear endpoint detection without the need for additional indicators in many cases. Also utilized in electrochemical studies and in the preparation of cerium-based catalysts.