Used primarily as an intermediate in the synthesis of agrochemicals and pharmaceuticals. Its reactivity makes it suitable for introducing the 4-tert-butylphenoxyacetyl group into larger molecules, particularly in the development of herbicides and plant growth regulators. It is also employed in the preparation of specialty esters and amides in research settings. Due to its acyl chloride functionality, it readily reacts with nucleophiles such as alcohols and amines under controlled conditions. Handling requires care, as it is moisture-sensitive and can be corrosive.