Used as a highly effective surfactant in fire-fighting foams due to its ability to suppress flammable liquid fires quickly. Its strong surface activity allows it to form a stable foam layer that prevents oxygen from reaching the fuel source. Also employed in industrial cleaning formulations where resistance to harsh conditions is required. Shows excellent wetting and spreading properties on difficult surfaces, making it useful in specialty coatings and adhesives. Persistent in the environment, so its use is being phased out in many regions due to ecological and health concerns.