A ratiometric fluorescent calcium indicator
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Alternative(s)
20414Fura-2 (sodium salt)
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Fura-2 (potassium salt)

Item No. 19531

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
2-[6-[bis(carboxymethyl)amino]-5-[2-[2-[bis(carboxymethyl)amino]-5-methylphenoxy]ethoxy]-2-benzofuranyl]-5-oxazolecarboxylic acid, pentapotassium salt
CAS Number
113694-64-7
Molecular Formula
C29H22N3O14 • 5K
Formula Weight
832.0
Purity
≥90%
Emission
510 nm
Excitation
340, 380 nm
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
Water: Soluble
SMILES
[O-]C(CN(C1=CC2=C(C=C(C3=NC=C(C([O-])=O)O3)O2)C=C1OCCOC(C=C(C)C=C4)=C4N(CC([O-])=O)CC([O-])=O)CC([O-])=O)=O.[K+].[K+].[K+].[K+].[K+]
InChi Code
InChI=1S/C29H27N3O14.5K/c1-15-2-3-17(31(11-24(33)34)12-25(35)36)20(6-15)43-4-5-44-21-7-16-8-22(28-30-10-23(46-28)29(41)42)45-19(16)9-18(21)32(13-26(37)38)14-27(39)40;;;;;/h2-3,6-10H,4-5,11-14H2,1H3,(H,33,34)(H,35,36)(H,37,38)(H,39,40)(H,41,42);;;;;/q
InChi Key
HQKWBBCTCLUGSX-UHFFFAOYSA-I
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    500 µg

    $64

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    1 mg

    $115

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    5 mg

    $415

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    Product Description

    Fura-2 is a ratiometric fluorescent calcium indicator that can be used to detect calcium in cells.1 It is a pentacarboxylate that displays excitation maxima of 340 and 380 nm at high and low calcium concentrations, respectively, when the emission is fixed at 510 nm, enabling determination of ratiometric measurements of calcium influx in live cells.

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Kong, S.K., and Lee, C.Y. The use of fura 2 for measurement of free calcium concentration. Biochem. Mol. Biol. Ed. 23(2), 97-98 (1995).