Used primarily as an intermediate in organic synthesis, particularly in the pharmaceutical and agrochemical industries. It serves as an acylating agent, introducing the isobutyryl group into various compounds. Commonly employed in the preparation of esters, amides, and ketones through reactions with alcohols, amines, or organometallic reagents. Its reactivity makes it valuable in synthesizing active pharmaceutical ingredients and fine chemicals where controlled acylation is required. Also utilized in the production of fragrances and flavoring agents due to its ability to form ester derivatives with volatile characteristics. Requires careful handling due to its lachrymatory and corrosive nature.