Used as an intermediate in the synthesis of dyes and pigments, particularly in the production of reactive dyes for textiles. It plays a key role in forming covalent bonds with cellulose fibers, improving color fastness. Also employed in the development of pharmaceuticals and agrochemicals due to its ability to act as a building block in heterocyclic compound synthesis. Its reactivity allows for easy substitution of chlorine, enabling functionalization for specific applications in drug design and crop protection agents. Additionally, it finds use in polymer chemistry as a crosslinking agent to enhance thermal and mechanical properties of materials.