Used primarily as an intermediate in the synthesis of agricultural chemicals, particularly herbicides and fungicides. It plays a key role in the production of certain chlorinated aromatic compounds that exhibit biological activity against plant pathogens and weeds. Due to its reactive aldehyde group and chlorinated aromatic structure, it serves as a building block in organic reactions to introduce the tetrachlorobenzyl moiety into more complex molecules. It is also utilized in research for developing specialty chemicals with tailored biocidal properties. Handling requires caution due to potential toxicity and environmental persistence associated with polychlorinated aromatics.