Nonyl sulfide is commonly used as a lubricant additive due to its ability to reduce friction and wear in mechanical systems. It is particularly effective in high-pressure and high-temperature environments, making it suitable for industrial machinery and automotive applications. Additionally, it serves as a corrosion inhibitor, protecting metal surfaces from degradation caused by moisture and chemical exposure. In the field of organic synthesis, nonyl sulfide is utilized as a reagent or intermediate in the production of various chemical compounds. Its properties also make it a candidate for use in the formulation of specialty chemicals and coatings.