Mordant Yellow 1 is primarily used as a dye in various industrial and laboratory applications. It is commonly employed in the textile industry for dyeing fabrics, particularly wool and silk, due to its ability to form stable complexes with metal ions, enhancing color fastness. The dye is also utilized in biological staining techniques, where it helps in the identification and differentiation of tissues under microscopic examination. Additionally, Mordant Yellow 1 finds application in analytical chemistry as an indicator in complexometric titrations, aiding in the determination of metal ion concentrations. Its vibrant yellow color makes it suitable for use in inks and coatings, providing consistent and durable coloration.