Calcein-AM is a cell-permeable fluorescent dye used for the determination of cell viability.

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.

Calcein Blue AM is a live cell labeling dye that permeates the cell membrane. Upon entering cells, intracellular esterases cleave the ester group of acetoxymethyl (AM), producing Calcein Blue fluorescent dye that is impermeable to cell membranes.

Calcein Orange Diacetate is a fluorogenic dye that is used to assess cell viability. It is hydrolyzed to the fluorescent probe Calcein Orange . Calcein Orange is retained by living cells and displays excitation/emission maxima of 525/550 nm, respectively. Calcein Orange Diacetate is an orange-emitting variant of the green fluorophore Calcein AM , which has been used to evaluate cell viability and cytotoxicity.