NHS PEG DSPE can be easily incorporated into liposomes and other nanoparticles through the reaction of NHS with amine. DSPE peg NHS is one of the most commonly used reactive phospholipids that bind antibodies, proteins, peptides or other substrates to the surface of liposomes and other lipid peg nanoparticles. Pegylated phospholipids have longer blood circulation time and higher encapsulation molecular stability. We have developed a series of chemically reactive phospholipid peg products with high purity, various molecular weights and excellent chemical reactivity. These lipid peg conjugates exhibit excellent amphiphilic properties and provide superior advantages for the modification, preparation and transportation of small and large molecules.