Ethylferrocene is widely used as a fuel additive to improve the combustion efficiency of solid rocket propellants. Its ability to enhance burning rates and stabilize combustion makes it valuable in aerospace applications. Additionally, it serves as a precursor in the synthesis of organometallic compounds, which are utilized in catalysis and materials science. In electrochemistry, ethylferrocene is employed as a redox-active compound in the development of sensors and biosensors due to its stable and reversible electron transfer properties. It also finds use in organic synthesis as a building block for creating complex ferrocene derivatives with potential applications in pharmaceuticals and agrochemicals.