Used primarily as a dye in the textile industry for dyeing protein fibers such as wool and silk, and synthetic polyamide fibers such as nylon, Acid Violet 43 provides a bright violet shade with good leveling properties. It is also applied in the printing of textiles where consistent color and solubility in water are required. Additionally, it finds use in paper dyeing and in some cases for coloring leather. Due to its acidic nature, it performs best in acidic dyeing conditions, ensuring strong color uptake and uniform distribution. It offers good fastness to washing and light. Limited use may occur in ink formulations and as a staining agent in certain biological or histological applications, though this is less common.