Calcein

Bis[N,N-bis(carboxymethyl)aminomethyl]fluorescein. Application: Metal indicator for Ca2+, fluorometric


Calcein is a fluorescent metal indicator for calcium detection with EDTA titration. It is slightly soluble in water. The proton dissociation constants are reported to be pKa1=2.1, pKa2=2.9, pKa3=4.2, pKa4=5.5, pKa5=10.8 and pKa6=11.7. Calcein solution emits a yellowish-green fluorescence in acidic conditions, and no fluorescence in basic conditions.

Calcein
DJC001
1 g
Calcein
DJC001
5 g