Used primarily as an intermediate in organic synthesis, especially in the production of pharmaceuticals and agrochemicals. It serves as an acylating agent to introduce the 4-tert-butylbenzoyl group into various compounds, enhancing lipophilicity and stability in drug molecules. Commonly employed in the synthesis of liquid crystals and photoactive materials due to the bulky tert-butyl group providing steric hindrance and influencing molecular packing. Also utilized in the preparation of specialty polymers and resins where controlled reactivity and structural rigidity are required. Its reactivity with nucleophiles like amines and alcohols makes it valuable for constructing amide and ester linkages in complex molecules.