Phosphorylethanolamine is used in the synthesis of Sphingomyelin, a type of sphingolipid found in animal cell membrane.Storage and Stability:Lyophilized powder may be stored at -20°C. Stable for 6 months after receipt at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.