Used as a versatile reagent in bioorganic chemistry, particularly for the modification of biomolecules such as peptides, proteins, and antibodies. It serves as a redox-active marker in electrochemical biosensors, enabling the detection of specific biological interactions. Its ferrocene moiety provides a stable and reversible electrochemical signal, making it valuable in developing diagnostic tools and immunoassays. Additionally, it is employed in the synthesis of ferrocene-labeled compounds for studying electron transfer processes in biological systems. Its application extends to materials science, where it is used to create redox-active polymers and surfaces for advanced functional materials.