Calcein Red AM

Calcein Red AM, a red-emitting derivative of the green fluorophore calcein AM, is a cell-permeable, non-fluorescent acetoxymethyl ester compound commonly utilized to assess cell viability and cytotoxicity. following intracellular esterase cleavage, the fluorescent product is retained in live cells and exhibits characteristic excitation and emission peaks at 560 nm and 574 nm, respectively.