Product Introduction Phosphatidylcholine (PC) is a strong bilayer-forming lipid. It the most common phospholipid in mammalian membranes. It is also an important component of the mucosal layer of the colon. The list of Phosphatidylcholine products offered by Avanti is designed to provide compounds having a variety of physical properties. Products available include short chain (C3-C8 are water soluble and hygroscopic), saturated, multi-unsaturated and mixed acid PC′s. All of the products are purified by HPLC, and special precautions are taken to protect the products for oxidization and hydrolysis. Application 12:0 PC (DLPC) is suitable to use as a phospholipid (PL) standard to quantify phosphatidylcholine (PC) by electrospray ionization mass spectrometry (ESI-MS).