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Cal-770™, potassium salt
Calcium measurement is critical for numerous biological investigations. Fluorescent probes that show spectral responses upon binding calcium have enabled researchers to investigate changes in intracellular free calcium concentrations by using fluorescence microscopy, flow cytometry, fluorescence spectroscopy and fluorescence microplate readers. Cal-770™ is a near infrared (NIR) calcium indicator with maximum emission at ~775 nm. It is the only fluorescent calcium indicator with excitation and emission longer than 700 nm with a moderate calcium affinity of Kd ~850 nM. Cal-770™ is one of the very few calcium indicators that can be potentially used for in vivo imaging since it has a NIR fluorescence.
Cal-770 was incubated with buffer that contains different concentration of free Ca2+. The fluorescence was monitored.
Cal-770 was incubated with buffer that contains different concentration of free Ca2+. The fluorescence was monitored.
CatalogSize
Price
Quantity
2046010x50 ug
Price
 
Physical properties

Dissociation constant (Kd, nM)850
Molecular weight1688.58
SolventWater
Spectral properties

Excitation (nm)758
Emission (nm)783
Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12352200
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Page updated on October 13, 2025