N-Ethyl-N,N-dipropylpropan-1-aminium iodide is a quaternary ammonium compound classified as an alkylammonium salt. It is commonly employed as a phase transfer catalyst in organic synthesis to facilitate the transfer of reactants between immiscible phases. Additionally, it serves as a surfactant, antimicrobial agent, or corrosion inhibitor. Its distinctive chemical properties make it an essential reagent for various industrial applications, including pharmaceuticals, agrochemicals, and materials science.