Used as a strong nucleophile and base in organic synthesis, particularly in the preparation of sulfur-containing compounds. It facilitates carbon-sulfur bond formation and is employed in reactions such as thioether synthesis and ring-opening of epoxides. Also utilized in the modification of pharmaceuticals and agrochemicals where sulfur functionality is required. Its reactivity makes it suitable for deprotonation of acidic protons and as a reagent in lithium-mediated transformations.