Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by transferring ions into organic solvents. Commonly applied in nucleophilic substitution reactions, coupling reactions, and polymerization processes. Also utilized in electrochemistry as a supporting electrolyte due to its high solubility in nonpolar solvents and good ionic conductivity. Its bulky structure helps stabilize reactive intermediates and anions, making it valuable in fine chemical and pharmaceutical manufacturing.