Used as an electrolyte in electrochemical applications, particularly in supercapacitors and batteries, due to its high ionic conductivity and stability. It is also employed in organic synthesis as a phase-transfer catalyst, facilitating reactions between compounds in different phases. Additionally, it serves as a supporting electrolyte in non-aqueous electrochemistry for studying redox processes and electrochemical behavior of various compounds. Its thermal and chemical stability makes it suitable for high-performance applications in advanced materials and energy storage systems.