Used as a pH indicator in various laboratory applications, particularly in microbiology and biochemistry. It helps in determining the pH range of solutions, typically changing color from yellow (acidic) to purple (basic) around pH 5.2 to 6.8. Commonly employed in cell culture media to monitor pH changes during microbial growth. Also utilized in titrations and as a visual aid in educational experiments to demonstrate acid-base reactions. Its sensitivity makes it suitable for detecting subtle pH shifts in environmental and clinical samples.