calcein red™ am

Calcein Red AM is a fluorogenic dye that is used to assess cell viability. As the acetoxymethyl ester, Calcein Red AM is non-fluorescent but cell-permeant and is hydrolyzed to the fluorescent probe Calcein Red by intracellular esterases. Calcein Red is retained by living cells and displays excitation emission maxima of 560 574 nm, respectively. Calcein Red AM is a red-emitting variant of the green fluorophore calcein AM , which has been used to evaluate cell viability and cytotoxicity.