1-Stearoyl-sn-glycerol 3-phosphate sodium, a biologically active phospholipid, plays a crucial role in regulating cell motility, proliferation, invasion, survival, and the production of growth factors through interactions with G protein-coupled receptors (GPCR). Synthesized during the formation of membrane phospholipids, this compound typically has a low plasma concentration (approximately 100nM) and originates from various cell types, including activated platelets, epithelial cells, leukocytes, neuronal cells, and tumor cells. Its distinctive structure features stearic acid at the sn-1 position and a hydroxyl group at the sn-2 position.