Used as a lipid excipient in liposomal drug delivery systems, providing structural stability to liposomes by integrating into the lipid bilayer. Enhances encapsulation efficiency and prolongs circulation time of therapeutic agents such as anticancer drugs and nucleic acids. Commonly employed in research settings for developing targeted and controlled-release formulations. Also serves as a transfection reagent in gene delivery applications due to its ability to fuse with cell membranes. Stable under physiological conditions, making it suitable for in vivo applications.