Diphenylgermanium dichloride is primarily used in organic synthesis as a reagent for introducing germanium into various chemical compounds. It serves as a precursor in the preparation of organogermanium compounds, which are of interest in materials science and catalysis. The compound is also utilized in the development of semiconductors and optoelectronic materials due to its ability to form stable germanium-containing frameworks. Additionally, it finds application in polymer chemistry, where it is employed to modify polymer properties or create germanium-based polymers with unique characteristics. In research, it is used to study the reactivity and bonding behavior of germanium in organic molecules, contributing to advancements in organometallic chemistry.