Used as a nonionic surfactant in emulsion polymerization, particularly in the production of synthetic rubber and latex. It stabilizes emulsions by reducing surface tension between immiscible phases, allowing for uniform particle dispersion. Commonly applied in adhesives, coatings, and textile finishes due to its ability to improve wetting and emulsifying properties. Also functions as a compatibilizer in polymer blends and is effective in low-foaming applications, making it suitable for use in industrial cleaners and processing aids. Its styrenated end groups enhance hydrophobic interactions, improving performance in water-resistant formulations.