Propargyl sulfide is primarily utilized in organic synthesis as a building block for more complex chemical structures. It serves as a key intermediate in the production of pharmaceuticals, agrochemicals, and specialty chemicals. Its reactive alkyne and sulfide groups make it valuable for creating sulfur-containing compounds, which are often used in drug development and material science. Additionally, it finds application in the preparation of heterocyclic compounds, which are important in the synthesis of biologically active molecules. In material science, propargyl sulfide is used to modify surfaces or create polymers with specific properties, such as enhanced durability or conductivity. Its versatility in chemical reactions makes it a useful component in research and industrial processes.