Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases. It is particularly effective in nucleophilic substitution reactions, where it helps transfer anions from the aqueous phase to the organic phase. Commonly employed in the synthesis of pharmaceuticals, agrochemicals, and fine chemicals. Also utilized in electrochemical applications, such as in non-aqueous electrolytes for batteries and supercapacitors, due to its ionic conductivity and stability. Additionally, it serves as a supporting electrolyte in various electrochemical studies and processes.