Fluorescein-DHPE (N-(Fluorescein-5-thiocarbamoyl)-1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine, triethylammonium salt) is a useful surface pH indicator and has also been used for measuring lateral diffusion in membranes via fluorescence photobleaching recovery method.    &lamba;Ex/&lamba;Em(MeOH) = 496/ 519nm  Orange solid soluble in chloroform  Store at -20°C and protect from light  C64H100N3O13PS  MW: 1182.53  [87706-98-7]