Tetrabromophenol Blue sodium salt is widely used as a pH indicator in various analytical and laboratory applications. It is particularly effective in titration experiments, where it helps to visually determine the endpoint of acid-base reactions due to its distinct color change. In biochemistry, it serves as a staining agent for detecting proteins and nucleic acids in gel electrophoresis, enhancing the visibility of separated biomolecules. Additionally, it is employed in environmental testing to monitor water quality, specifically for assessing pH levels in aquatic systems. Its stability and sensitivity make it a valuable tool in both research and industrial settings.