Used as a pH indicator in laboratory and industrial applications, particularly in processes requiring precise pH monitoring in the neutral to slightly alkaline range (pH 7.2-8.8). It changes color from yellow to red in response to pH shifts, making it useful in titrations, water quality testing, and biochemical assays. Commonly applied in environmental testing, fermentation processes, and educational experiments to visually demonstrate acid-base reactions. Its clear color transition allows for easy detection of endpoint changes without need for advanced instrumentation.