Used as a red dye in histology for staining biological tissues, particularly in combination with other dyes for microscopic examination. Commonly applied in trichrome staining methods to differentiate collagen fibers from muscle fibers. Also utilized in textile dyeing as an acid dye for coloring protein-based fabrics with a bright red hue. Shows good affinity for protein fibers like wool and silk. Exhibits moderate light fastness and wash resistance, suitable for general textile applications requiring vibrant colors.