Calcein AM is a widely used green fluorescent cell marker. Calcein AM is membrane-permeant and thus can be introduced into cells via incubation. Once inside the cells, calcein AM is hydrolyzed by endogenous esterase into the highly negatively charged green fluorescent calcein, which is retained in the cytoplasm. Calcein AM is an excellent tool for the studies of cell membrane integrity and for long term cell tracing. Calcein AM is used in our Cell Viability Cytotoxicity Assay Kit (See Bioscience Section for 30002).

• l_ex\l_em--(calcein) = 494/517 nm (Ph 8). 
• Colorless solid soluble in DMSO
• Store at -20°C and protect from light.
• C₄₆H₄₆N₂O₂₃
• Mwt: 995.