Used as a phase-transfer catalyst in organic synthesis, particularly in phosphorylation reactions where it facilitates the transfer of phosphate groups to organic molecules under mild conditions. Its solubility in both aqueous and organic phases makes it effective in biphasic reaction systems. Commonly applied in the preparation of nucleotide analogs, phospholipids, and other phosphorylated biomolecules. Also utilized in the synthesis of pharmaceutical intermediates where selective and efficient phosphorylation is required.