BAPTA AM, calcium chelator

Cat. # Quantity Price Lead time
1891-5mg 5 mg –   in stock
1891-25mg 25 mg $149 in stock
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BAPTA AM is a membrane-permeable form of BAPTA, a highly selective calcium chelator. After loading into a cell, BAPTA AM is converted into BAPTA by cytoplasmic esterases. It is widely used for controlling the cytosolic calcium concentration (Kd = 0.11 μM), inhibiting voltage-gated potassium (Kv) channels, and other applications evaluating the role of intracellular calcium in cell signaling.

BAPTA AM can also be used as a calcium indicator since its absorption maximum changes after complexing with calcium (absorption max. of free/complexed is at 254/274 nm, emission max. of free/complexed is at 363/363 nm).

The commonly used concentration of BAPTA AM for cell signaling studies is 10-100 μM. Because AM esters have low water solubility, mild detergent (such as Pluronic® F-127) is necessary to facilitate loading into the cell.

Absorption and emission spectra of the Calcium ion-BAPTA complex

Absorption and emission spectra of the Calcium ion-BAPTA complex

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General properties

Appearance: white to beige solid
Molecular weight: 764.69
CAS number: 126150-97-8
Molecular formula: C34H40N2O18
IUPAC name: N,N'-[1,2-ethanediylbis(oxy-2,1-phenylene)]bis[N-[2-[(acetyloxy)methoxy]-2-oxoethyl]-1,1'-bis[(acetyloxy)methyl] ester-glycine
Solubility: DMSO
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: 274 (complex)
Emission maximum, nm: 372
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