Used as an intermediate in the synthesis of pharmaceuticals, particularly in the production of angiotensin II receptor antagonists like valsartan and related sartan-class drugs. It plays a key role in constructing the biphenyl core structure that is essential for the biological activity of these antihypertensive agents. Its aldehyde functional group allows for further chemical modifications, enabling the attachment of various side chains during drug development. Also utilized in organic synthesis for building complex aromatic systems in medicinal chemistry research.