Ferrocenecarboxaldehyde is widely used in the development of organometallic compounds for catalysis, particularly in redox-active systems. Its aldehyde functional group allows for easy modification through condensation reactions, making it a key building block in the synthesis of ferrocene-based ligands and sensors. It is employed in the preparation of bioorganometallic molecules for medicinal chemistry research, including anticancer agents. The compound also finds application in electrochemistry, where it serves as a precursor for redox mediators in biosensors and molecular electronics due to the stable and reversible iron-centered redox behavior. Additionally, it is used in nonlinear optical materials and in the fabrication of ferrocene-containing polymers for advanced materials science.