Widely used as a pH indicator in acid-base titrations, it turns colorless in acidic solutions and pink in basic solutions, typically changing color between pH 8.2 and 10.0. This makes it ideal for detecting the endpoint in strong acid-strong base titrations. It is commonly used in educational laboratories for teaching neutralization reactions. Also found in some industrial processes where pH monitoring is needed within the alkaline range. Due to its clear visual change, it is preferred for quick qualitative analysis of alkalinity in solutions.