Widely used in the textile industry for dyeing cotton, wool, and silk, providing bright blue shades with good color fastness. Commonly applied in the production of denim and other colored fabrics. Also used in paper manufacturing to tint paper products. Found in some ink formulations for printing and writing instruments. Used in biological staining for microscopy to visualize cell structures. Serves as a food additive in some regions, approved for use in certain beverages and confectionery under strict regulations. Employed in medical research as a tracer dye due to its visibility in low concentrations. Used in ophthalmic surgery as a vital dye to stain the anterior capsule during cataract procedures. Present in some cosmetics, including hair and skin care products, for coloration. Utilized in educational demonstrations to show diffusion and dialysis processes because of its water solubility and strong color.