Phenyl naphthalene-2-sulfonate is primarily used as an intermediate in organic synthesis, particularly in the production of dyes and pigments. It plays a role in creating colorants for textiles, inks, and coatings due to its ability to form stable and vibrant compounds. Additionally, it is utilized in the development of specialty chemicals for industrial applications, such as surfactants or additives in polymer production. Its sulfonate group also makes it useful in certain formulations where solubility and reactivity are required. Research and development efforts sometimes explore its potential in advanced materials and functional chemicals.