Used as a catalyst in organic synthesis, particularly in cross-coupling reactions such as Suzuki and Heck reactions, where it helps facilitate carbon-carbon bond formation under mild conditions. It is also employed in the preparation of perovskite materials for optoelectronic devices due to its ability to influence crystal growth and film quality. Its high solubility in polar solvents makes it suitable for solution-based processing techniques. Additionally, cesium acetate finds use in mass spectrometry as a derivatization agent to enhance detection sensitivity.