Used as a key intermediate in the synthesis of agrochemicals, particularly herbicides and insecticides, due to its reactive aldehyde group and chlorine functionality. Its structure allows for easy modification in multi-step reactions, making it valuable in creating active ingredients that target specific plant or pest systems. Also employed in the production of pharmaceuticals, where it serves as a building block for nitrogen-containing heterocyclic compounds with biological activity. Commonly utilized in research and development for designing new molecules in crop protection and medicinal chemistry.