Used in lipid signaling research, particularly in studies involving phosphatidylinositol phosphate metabolism. Acts as a synthetic analog of phosphatidylinositol bisphosphate (PIP2), helping to investigate intracellular signaling pathways, enzyme kinetics, and membrane dynamics. Commonly employed in assays with phospholipase C, kinases, and other lipid-modifying enzymes. Its triammonium salt form improves solubility and stability in aqueous biological systems. Valuable for in vitro studies aiming to understand cell regulation, calcium signaling, and cytoskeletal organization.