Used as a key intermediate in the synthesis of agrochemicals, particularly herbicides and insecticides, due to its reactive chlorine and electron-deficient pyrimidine ring. Its ethoxy group enhances lipophilicity, improving membrane permeability in active ingredients. Also employed in pharmaceutical research for developing kinase inhibitors and other bioactive molecules. Commonly utilized in cross-coupling reactions, such as Suzuki or Buchwald-Hartwig, to introduce aryl or amino substituents in drug discovery programs.