This compound is widely used as a phase-transfer catalyst in organic synthesis, facilitating the reaction between substances in different phases, such as aqueous and organic layers. It is particularly effective in the preparation of ylides, which are intermediates in the Wittig reaction, a key method for forming alkenes from aldehydes or ketones. Additionally, it serves as a reagent in the synthesis of various organic compounds, including pharmaceuticals and fine chemicals. Its ability to stabilize reactive intermediates makes it valuable in polymer chemistry and material science.