Leucocrystal Violet is widely used in forensic science as a reagent to detect latent or diluted bloodstains on various surfaces. When applied in a solution, it reacts with the peroxidase-like activity of hemoglobin in blood, undergoing oxidation to produce a visible purple color that helps investigators identify and document blood evidence effectively. It is particularly useful for enhancing faint or washed-out bloodstains on porous and non-porous surfaces. Additionally, as a leuco dye, it has potential applications in biological staining and other dye-related processes, though its primary role is in forensic analysis. Its high sensitivity makes it a valuable tool in criminal investigations.