Used primarily in analytical chemistry, it serves as a visual indicator in iodometric titrations. When iodine is present, it forms a deep blue complex with the indicator, signaling the endpoint of the titration. This is particularly useful in determining the concentration of oxidizing or reducing agents in a solution. It is also employed in various laboratory experiments to detect the presence of iodine or to monitor redox reactions. Its sensitivity and clear color change make it a reliable choice for precise chemical analysis.