Used primarily as a chlorinating and sulfenylating agent in organic synthesis, enabling the introduction of chlorine and sulfenyl groups into complex molecules. It is particularly effective in the preparation of sulfonyl chlorides and other sulfur-containing compounds, which are key intermediates in pharmaceuticals, agrochemicals, and specialty polymers. Due to its high reactivity, it facilitates rapid functionalization under controlled conditions, making it valuable in research and development of active ingredients in crop protection agents and medicinal chemistry.