Widely used as a pH indicator in analytical chemistry, this compound changes color depending on the acidity or alkalinity of a solution. It is especially effective in titrations involving weak acids and strong bases, where it provides a clear visual endpoint. The color transition from colorless in acidic conditions to pink in basic environments makes it valuable for determining pH in the range of approximately 8.2 to 10.0. Commonly found in laboratory settings, it is used in educational experiments, quality control testing, and environmental monitoring to assess alkalinity in water samples. Its distinct color change and reliability contribute to its widespread use in acid-base indicators and test papers.