Used as a pH indicator in analytical chemistry, Bromocresol green changes color from yellow to blue as pH increases, typically over the range of 3.8 to 5.4. It is commonly employed in titrations and pH testing of solutions, especially in biological and environmental samples. The dye is also utilized in protein assays, where it binds to proteins for quantification, such as in the measurement of serum albumin in clinical laboratories. Additionally, it serves as a visual indicator in electrophoresis and chromatography techniques to monitor the progress of separation processes.