Cephalin is widely used in medical and biochemical research due to its role as a phospholipid found in cell membranes, particularly in brain tissue. It is essential for studying blood coagulation processes, as it acts as a platelet-activating factor and plays a key role in the clotting cascade. In laboratories, cephalin is often utilized as a reagent in clotting tests, such as the activated partial thromboplastin time (aPTT) test, to evaluate the intrinsic pathway of coagulation and diagnose bleeding disorders. Additionally, it is used in neuroscience research to investigate membrane dynamics and signal transduction in neural cells. Its application extends to the development of drug delivery systems, where its lipid properties help in creating liposomes for targeted therapy.