Used as a pH indicator in analytical chemistry, particularly in titrations where a clear color change is needed in the acidic to neutral pH range. It is commonly employed in biochemical and environmental testing to determine endpoint changes due to its distinct shift from red to yellow around pH 4.0 to 5.6. Its water solubility and stability in solution make it suitable for use in aqueous systems, including soil testing, food analysis, and quality control in pharmaceuticals. Also utilized in educational laboratories for teaching acid-base reactions because of its reliable and visible color transition.