Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of pyrimidine-based drugs such as antiviral and anticancer agents. Its reactive aldehyde and chlorine groups allow for selective functionalization, making it valuable in constructing heterocyclic compounds for medicinal chemistry. Also employed in agrochemicals for the design of novel pesticides and herbicides due to its ability to enhance bioactivity in active ingredients. Commonly utilized in research laboratories for building blocks in organic synthesis, especially in the preparation of substituted pyrimidines with tailored biological properties.