Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its reactive chlorosulfonyl group allows for easy modification to sulfonamide or sulfonic acid derivatives, which are common motifs in bioactive molecules. It is particularly valuable in the development of herbicides and fungicides due to the enhanced stability and membrane permeability provided by the furan ring. Also employed in the preparation of specialty polymers and functional materials where sulfonyl-containing esters act as crosslinking agents or catalysts. Its ester functionality enables further chain extension or coupling reactions, making it useful in combinatorial chemistry and drug discovery.