Used primarily as an intermediate in organic synthesis, especially in the production of pharmaceuticals and agrochemicals. It reacts readily with amines and alcohols to form amides and esters, making it valuable in constructing complex molecules. Commonly employed in the synthesis of non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen and related derivatives, due to its structural similarity to arylpropionic acid frameworks. Also utilized in the preparation of fragrances and specialty polymers where controlled acylation is required. Its reactivity demands careful handling, but it offers high efficiency in introducing the 2-phenylpropanoyl group in multi-step syntheses.