1,1-Diphenylethane is primarily used as an intermediate in the synthesis of various organic compounds. It serves as a building block in the production of specialty chemicals, including pharmaceuticals and agrochemicals. Its structure allows it to participate in reactions that form more complex molecules, making it valuable in research and industrial chemistry. Additionally, it is utilized in the development of liquid crystals and polymers, where its stability and aromatic properties are advantageous. In some cases, it is also employed as a solvent or additive in specific chemical processes due to its non-reactive nature under certain conditions.