Used as a reactive dye in the textile industry, particularly for dyeing cotton, wool, and silk fabrics. It provides bright, intense blue or greenish-blue shades with good lightfastness and wash resistance. The sulfonic acid group enhances water solubility, facilitating even dye uptake during the dyeing process. Commonly applied in cold-dyeing methods where it forms stable covalent bonds with fiber molecules, ensuring durable coloration. Also utilized in ink formulations for printing on cellulosic materials due to its strong affinity and color stability.