This compound is widely utilized in immunological research due to its role in the complement system, where it acts as an anaphylatoxin. It is often employed in studies focusing on inflammation and immune responses, as it can induce chemotaxis and activate immune cells such as mast cells and basophils. Researchers use it to investigate mechanisms of allergic reactions, autoimmune diseases, and other inflammatory conditions. Additionally, it serves as a tool in drug development to test potential inhibitors or modulators of the complement pathway. Its application extends to understanding tissue injury and repair processes, particularly in the context of ischemia-reperfusion injury and other inflammatory pathologies.