Used primarily in hair dye formulations, it acts as a key intermediate for oxidative hair coloring. It helps achieve a range of shades, particularly darker tones, by reacting with other dye components during the oxidation process. Its stability and effectiveness make it a common choice in permanent hair color products. Additionally, it is employed in some industrial applications, such as dyeing textiles and fur, due to its ability to produce durable and vibrant colors. Proper handling is essential as it can pose health risks if not managed safely.