Perfluoroheptanesulfonic acid is primarily used in industrial applications due to its strong surfactant properties. It is commonly employed in the production of firefighting foams, particularly for extinguishing fuel-based fires, as it effectively reduces surface tension and forms a film to suppress flames. Additionally, it is utilized in the manufacturing of coatings and adhesives, where its water and oil repellent characteristics enhance product performance. In the electronics industry, it serves as a key component in etching and cleaning processes for semiconductors, ensuring precision and efficiency. Its chemical stability also makes it suitable for use in advanced material synthesis and research applications.