Used as a key intermediate in organic synthesis, particularly in the preparation of sulfones and sulfonamides through reactions with electrophiles or oxidizing agents. It serves as a source of the phenylsulfonyl anion in substitution reactions, enabling the introduction of phenylsulfonyl groups into target molecules. Commonly applied in pharmaceutical synthesis for building active ingredients that require sulfonyl-containing structures. Also utilized in polymer chemistry as a modifier or catalyst in certain radical reactions. Additionally, employed in photochemistry and photocatalysis, functioning as a radical source under light irradiation, with potential in light-controlled reaction acceleration systems. Its stability and solubility in polar solvents make it suitable for use in aqueous and mixed solvent systems.