Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of antihypertensive and anti-inflammatory drugs. It serves as a building block in the preparation of quinazoline derivatives, which exhibit biological activity such as kinase inhibition and antimicrobial effects. Also employed in agrochemical research for the development of herbicides and pesticides due to its reactivity and ability to form stable chlorinated heterocyclic compounds. Its electrophilic nature makes it suitable for nucleophilic substitution reactions in organic synthesis.