Used as a pH indicator in analytical chemistry, particularly in titrations involving weak acids and strong bases. It changes color in the pH range of 1.3 to 3.2, transitioning from red to yellow, making it suitable for detecting the endpoint in acid-base reactions within this range. Commonly employed in industrial and laboratory settings for quick and reliable pH assessment of solutions. Also utilized in educational experiments to demonstrate acid-base behavior due to its clear and distinct color change.