Used as a cationic lipid in lipid nanoparticles (LNPs) for delivering nucleic acids such as mRNA and siRNA. Its positively charged head group helps encapsulate genetic material and protect it from degradation in the bloodstream. Facilitates cellular uptake and endosomal escape, making it critical in gene therapy and vaccine formulations, including mRNA-based vaccines. Commonly found in pharmaceutical research and development for targeted delivery systems.