Calcein AM, green fluorescent cell viability probe

Cat. # Quantity Price Lead time
3564-50ug 50 ug
$14.00
in stock
3564-1mg 1 mg
$239.00
in stock
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Calcein AM is a cell-permeant green fluorogenic dye used to assess the viability of live cells.

The neutral, hydrophobic Calcein AM easily crosses the cell membrane of living cells. Inside the cell, intracellular esterases cleave the acetoxymethyl (AM) group, releasing the Calcein molecule, which is a membrane-impermeant and highly fluorescent form. The intensity of the Calcein fluorescence is proportional to the number of living cells and the activity of the esterases within them.

Calcein AM is used in microscopy and flow cytometry to indicate cell health. It is also a sensitive indicator for intracellular calcium changes, cytotoxicity, and multidrug resistance.

Calcein AM staining is not compatible with cell fixation and permeabilization.

Excitation and emission spectra of free Calcein

Excitation and emission spectra of free Calcein

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General properties

Appearance: yellow solid
Molecular weight: 994.86
CAS number: 148504-34-1
Molecular formula: C46H46N2O23
Solubility: DMSO, DMF, ethanol
Quality control: NMR 1H and HPLC-MS (95+%)
Storage conditions: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 492
Emission maximum, nm: 514
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