Methyl violet is widely used as a dye in the textile industry for coloring fabrics, particularly cotton, silk, and paper. It is also employed in biological staining to differentiate cell types under a microscope, especially in Gram staining to identify bacteria. In the medical field, it serves as an antiseptic for treating minor skin infections and fungal conditions like athlete's foot. Additionally, it is utilized as a pH indicator in laboratories, changing color in response to acidity or alkalinity. Its application extends to the ink industry, where it is used to produce vibrant purple inks for pens and printers.