Used as a highly stable surfactant in extreme environments due to its strong fluorocarbon chain and sulfonic acid group. Commonly applied in specialty coatings and firefighting foams where thermal and chemical resistance are critical. Also utilized in electrochemical applications for its proton-conducting properties, especially in high-performance fuel cells operating under harsh conditions. Its fluorinated structure provides excellent water and oil repellency, making it suitable for industrial cleaning agents and surface treatments requiring long-term durability.