1,3-Diisopropylbenzene is primarily used as an intermediate in the production of various chemicals and materials. It serves as a key component in the synthesis of specialty polymers and resins, which are utilized in coatings, adhesives, and high-performance plastics. Additionally, it is employed in the manufacture of agrochemicals, such as herbicides and pesticides, due to its ability to act as a building block for complex organic molecules. In the fragrance industry, it is sometimes used as a precursor for creating aromatic compounds. Its stability and reactivity also make it suitable for use in organic synthesis and research applications, particularly in the development of new chemical processes and products.