Used primarily as an intermediate in the synthesis of pharmaceuticals and fine chemicals. It plays a key role in the production of antihistamines, particularly in the development of derivatives related to diphenhydramine. Its structure allows for easy modification in organic reactions, making it valuable in creating complex molecules. Commonly employed in Friedel-Crafts acylation and alkylation reactions due to its reactivity as a chloro compound. Also utilized in the preparation of ligands and catalysts in asymmetric synthesis. Its benzylic chloride functionality enables nucleophilic substitution reactions, facilitating the introduction of the 2-methylbenzhydryl group in target molecules.