Ferrocenecarboxylic acid is widely used in electrochemistry due to its reversible redox behavior, making it a valuable building block for designing redox-active sensors and biosensors. Its ability to undergo stable and predictable electron transfer allows integration into modified electrodes for detecting biological molecules such as glucose, dopamine, and DNA. It is also employed in the development of organometallic drugs and bioorganometallic chemistry, where the ferrocene moiety can enhance lipophilicity and influence biological activity. Derivatives of ferrocenecarboxylic acid have shown potential in anticancer research, particularly in compounds designed to target tumor cells selectively. In materials science, this compound serves as a precursor for synthesizing functional polymers and dendrimers with electroactive properties. These materials find use in molecular electronics, catalysis, and smart surfaces. Additionally, it acts as a chiral auxiliary or ligand scaffold in asymmetric synthesis, supporting the creation of enantiomerically pure compounds in pharmaceutical manufacturing.