CALCEIN, AM 1 MG，C1430，Invitrogen

Calcein AM is a cell-permeant dye that can be used to determine cell viability in most eukaryotic cells. In live cells the nonfluorescent calcein AM is converted to a green-fluorescent calcein after acetoxymethyl ester hydrolysis by intracellular esterases. This dye is also available as 1 mg of the solid (C-1430) and resuspended in DMSO (C-3099). For a longer wavelength version of this dye, check out our new CellTrace calcein red-orange AM (C-34851).