Di-4-ANEPPS is a fast-responding membrane potential dye. Changes in the membrane potential of the cell correlate with changes in the fluorescence excitation intensity of the dye.    &lamba;Ex/&lamba; Em(MeOH) = 496/705 nm  Orange red solid soluble in DMF, ethanol or DMSO  Store at 4°C and protect from light, especially in solution  C28H36N2O3S  MW: 481  [90134-00-2]