Used as a sulfurizing agent in organic synthesis, particularly in the preparation of thiocarbonyl compounds. It facilitates the conversion of carbonyl groups to thiocarbonyl groups in ketones and aldehydes, which is valuable in the development of pharmaceuticals and agrochemicals. Also employed in the synthesis of heterocyclic compounds where sulfur incorporation is required. Its reactivity makes it useful in radical reactions and polymer chemistry as a cross-linking or vulcanizing aid.