1,4-Dimethyl-1,2,4-triazolium iodide is primarily used in the field of organic synthesis, particularly as a reagent or catalyst in various chemical reactions. Its ionic nature makes it suitable for use in ionic liquids, which are often employed as solvents or reaction media in green chemistry applications. These ionic liquids can enhance reaction rates, improve selectivity, and reduce the need for volatile organic solvents.

In addition, this compound is explored in the development of advanced materials, such as electrolytes for batteries or fuel cells, due to its ionic conductivity and stability. It may also be investigated for its potential in pharmaceutical research, where it could serve as a building block for synthesizing biologically active molecules or as a component in drug delivery systems. Its unique structure and properties make it a versatile compound in both industrial and academic research settings.