L-erythro Sphinganine (d18:0) is primarily used in biochemical research to study sphingolipid metabolism and its role in cellular processes. It serves as a key intermediate in the biosynthesis of complex sphingolipids, which are essential components of cell membranes and play critical roles in signal transduction, cell growth, and apoptosis. Researchers utilize this compound to investigate its involvement in diseases such as cancer, neurodegenerative disorders, and metabolic syndromes. Additionally, it is employed in the development of therapeutic strategies targeting sphingolipid pathways. Its application extends to lipidomics studies, where it helps in the identification and quantification of sphingolipid species in biological samples.