Phosphatidic acids (PAs) can be formed by the acylation of lysophosphatidic acids, the phosphorylation of diacylglycerols, or the removal of the choline group from phosphatidylcholine. They have important roles in intracellular and extracellular signaling. 1,2-Dilauroyl-sn-glycero-3-phosphate is a phospholipid containing the medium-chain (12:0) lauric acid inserted at the sn-1 and sn-2 positions. It may be useful in evaluating the role of PAs in micelles, liposomes, and artificial membranes.