Used as a biological stain in microscopy to enhance contrast in cell and tissue samples. Commonly applied in histology and cytology for visualizing cellular structures, particularly nuclei, due to its strong affinity for nucleic acids. Also utilized as a pH indicator in some analytical procedures, showing distinct color changes in varying acidity levels. Employed in the textile industry for dyeing silk and wool, providing deep violet shades with good lightfastness. Occasionally used in antimicrobial studies as a model compound for evaluating the activity of disinfectants and antiseptics.