Widely used as a purple dye in textiles and paper industries due to its strong color and good affinity for cellulose-based materials. Commonly employed in biological staining, especially in Gram staining, where it differentiates bacterial types by binding to peptidoglycan in cell walls. Used as an indicator in analytical chemistry, particularly in acid-base titrations, where it changes color depending on pH. Applied in veterinary medicine as a topical antifungal and antiparasitic agent, especially in fish treatments and aquaculture. Utilized in ink formulations for writing and printing, providing a vibrant purple hue with good stability. Also used in some laboratory applications for nucleic acid staining and gel visualization, though less common than other dyes.