Used as a phase transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases by transferring ions into organic solvents. Commonly applied in alkylation, oxidation, and reduction reactions where efficient mixing of reagents is challenging. Also utilized in polymer chemistry to promote anionic polymerization and improve reaction rates and yields. Its lipophilic nature makes it effective in membrane permeabilization and biochemical studies involving mitochondria, where it helps deliver reactive species into cells or organelles.