1,3-Dithiolane is widely used in organic synthesis as a protective group for carbonyl compounds. Its cyclic structure allows it to form stable thioketals or thioacetals, which protect aldehydes and ketones during reactions that might otherwise affect these functional groups. This is particularly useful in multi-step synthetic processes where selective reactivity is required. Additionally, it serves as a precursor in the synthesis of various sulfur-containing heterocycles, which are important in the development of pharmaceuticals and agrochemicals. Its ability to release hydrogen sulfide under certain conditions also makes it valuable in research related to H2S donors, which have potential applications in medical therapies.