Cresol Red sodium salt is widely used as a pH indicator in various biochemical and analytical applications. It is particularly useful in titration experiments, where it helps to determine the endpoint of acid-base reactions due to its distinct color change at different pH levels. In microbiology, it is employed in culture media to monitor pH changes during microbial growth. Additionally, it is utilized in electrophoresis as a tracking dye to visualize the progress of DNA or protein migration. In cell biology, Cresol Red sodium salt is sometimes added to cell culture media to assess cell viability and metabolic activity by observing pH shifts. Its applications also extend to environmental testing, where it aids in measuring the pH of water samples.