1,3-Dimethylurea is primarily used as an intermediate in the synthesis of various chemical compounds, particularly in the production of pharmaceuticals and agrochemicals. It serves as a key building block in the creation of active ingredients for medicines and crop protection products. Additionally, it is utilized in organic synthesis reactions, where it acts as a reagent or catalyst to facilitate the formation of more complex molecules. In industrial applications, it is sometimes employed as a stabilizer or additive in certain chemical processes. Its role in these processes highlights its importance in advancing both medical and agricultural fields.