Product Name: 1, 2-dipalmitoyl-sn-glycero-3-phosphoethanolamine -N-mpeg2000 Cat.#: R-0038 CAS No : 205494-72-0 Appearance: White Powder Molecular Weight: 2800 Purity:99% Storage:-20℃ Stability:24months - See more at: http://www.resenbio.com/products-detail.php?ProId=56#sthash.TRdBZORp.dpuf