Used as a key intermediate in the synthesis of agrochemicals and pharmaceuticals, particularly in the development of herbicides and fungicides due to its reactive aldehyde group and halogenated aromatic structure. Its pyrazole moiety contributes to biological activity, making it valuable in creating active ingredients that target specific enzymes or receptors in pests or pathogens. Commonly employed in condensation reactions to form imines or hydrazones, which are further modified into more complex molecules with enhanced efficacy and selectivity.