5-(and-6)-Carboxy-2',7'-dichlorofluorescein diacetate is membrane-permeant and thus can be loaded into cells via incubation. The diacetate is readily hydrolyzed to 5-(and-6)-carboxy-2',7'-dichlorofluorescein by intracellular esterases.    White solid soluble in DMSO  Store at 4°C and protect from light, especially in solution  C25H14Cl2O9  MW: 529  [127770-45-0]