Used as a reagent in protein assays, particularly in the Bradford assay, where it binds to proteins to produce a color change that can be measured spectrophotometrically. The intensity of the color shift is proportional to protein concentration, making it valuable for quantifying protein levels in research and diagnostic laboratories. Also applied in cell and molecular biology workflows for monitoring protein expression and purification steps. Stable and easy to use, it is commonly included in assay kits and compatible with many sample types.