Bromocresol purple sodium salt is widely used as a pH indicator in various laboratory applications. It is particularly effective in the pH range of 5.2 to 6.8, where it transitions from yellow to purple. This makes it valuable in titrations, especially in biochemical and microbiological assays, to monitor pH changes accurately. It is also employed in cell culture media to visually assess the pH environment, ensuring optimal conditions for cell growth. Additionally, it is used in educational settings to demonstrate pH concepts and in environmental testing to evaluate water quality. Its stability and clear color change make it a reliable tool for quick and precise pH determination.