Used as a pH indicator in analytical chemistry, particularly in titration experiments where a visible color change is required to determine the endpoint. It is effective in detecting small changes in acidity or alkalinity in aqueous solutions. Commonly applied in educational laboratories for acid-base titrations due to its clear and sharp color transition. Also utilized in quality control processes in pharmaceuticals and food industries to monitor pH levels during production. Its solubility in water makes it suitable for use in liquid-based testing systems without the need for additional solvents.