5-Amino-2-naphthol is primarily used in the synthesis of azo dyes, which are widely applied in the textile industry for coloring fabrics. Its structure allows it to act as an intermediate in the production of dyes that exhibit strong colorfastness and vibrant hues. Additionally, it is utilized in the manufacture of pigments for inks, paints, and plastics, providing stability and durability to the final products. In the field of organic chemistry, it serves as a building block for the development of more complex compounds, including pharmaceuticals and agrochemicals. Its functional groups make it a valuable component in research and industrial applications requiring precise chemical modifications.