Reactive Red 120 is widely used in the textile industry for dyeing cotton, wool, and other natural fibers. It forms a strong covalent bond with the fabric, ensuring excellent wash and light fastness. This dye is particularly valued for its vibrant red shade and is commonly applied in exhaust dyeing, pad dyeing, and printing processes. Its high reactivity and compatibility with various dyeing methods make it a preferred choice for producing long-lasting, bright-colored textiles. Additionally, it is used in research and development for studying dyeing mechanisms and improving dye efficiency.