Direct Fast Brown M is widely used in the textile industry for dyeing cotton, rayon, and other cellulosic fibers. It provides a rich, durable brown shade with good colorfastness to washing and light. The dye is applied in aqueous solutions, often with the addition of salt to improve dye uptake. It is suitable for batch dyeing processes as well as continuous dyeing methods. Additionally, it is used in paper dyeing to achieve consistent and vibrant brown tones. Its ease of application and cost-effectiveness make it a popular choice for producing brown hues in various industrial applications.