Used as a reagent in analytical chemistry for the detection and quantification of peroxides and oxidizing agents. It serves as a chromogenic substrate in colorimetric assays, where its oxidation produces a visible color change, allowing for easy measurement in clinical and environmental testing. Commonly applied in diagnostic kits, including those for measuring hydrogen peroxide in biological samples or in enzymatic reactions involving oxidase enzymes. Its sensitivity to oxidation makes it valuable in monitoring oxidative stress and in industrial quality control processes where peroxide levels must be tracked.