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21877

Sigma-Aldrich

5(6)-Carboxyfluorescein

suitable for fluorescence, BioReagent, ≥95% (HPLC)

Sinónimos:

5(6)-FAM, 5,6-CF

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About This Item

Fórmula empírica (notación de Hill):
C21H12O7
Número de CAS:
72088-94-9
Peso molecular:
376.32
EC Number:
276-331-1
MDL number:
MFCD00151081
UNSPSC Code:
12171500
PubChem Substance ID:
329752213
NACRES:
NA.32

product line

BioReagent

Quality Level

200

assay

≥95% (HPLC)

form

powder

mp

275 °C (dec.) (lit.)

fluorescence

λex 492 nm; λem 517 nm in 0.1 M Tris pH 8.0

suitability

suitable for fluorescence

SMILES string

OC(=O)c1ccc2c(c1)C(=O)OC23c4ccc(O)cc4Oc5cc(O)ccc35.OC(=O)c6ccc7C(=O)OC8(c9ccc(O)cc9Oc%10cc(O)ccc8%10)c7c6

InChI

1S/2C21H12O7/c22-11-2-5-15-17(8-11)27-18-9-12(23)3-6-16(18)21(15)14-4-1-10(19(24)25)7-13(14)20(26)28-21;22-11-2-5-14-17(8-11)27-18-9-12(23)3-6-15(18)21(14)16-7-10(19(24)25)1-4-13(16)20(26)28-21/h2*1-9,22-23H,(H,24,25)

InChI key

BPVHBBXCESDRKW-UHFFFAOYSA-N

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General description

5(6)-Carboxyfluorescein, also known as 5(6)-FAM, is a fluorescent tracer and available as a mixture of 5-Carboxyfluorescein and 6-Carboxyfluorescein isomers. The fluorescence of 5(6)-Carboxyfluorescein is determined by the xanthene moiety. 5(6)-Carboxyfluorescein has two characteristic properties:
  • It has 2 wavelengths for maximum absorbance (465 and 490nm).
  • And its fluorescence emission, at 515nm(max.), increases as a function of pH in the physiological range of 6-7.4.

Application

5(6)-Carboxyfluorescein is used to characterize tumor cells and normal cells in vivo. It labels proteins derived through N-hydroxysuccinimide (NHS) ester-mediated derivatization. 5(6)-Carboxyfluorescein is suitable for detecting cell viability while developing an in vitro anthelmintic drug assay.

Other Notes

A probe of intracellular pH

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Busque Certificados de análisis (COA) introduciendo el número de lote del producto. Los números de lote se encuentran en la etiqueta del producto después de las palabras «Lot» o «Batch»

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M L Graber et al.
Analytical biochemistry, 156(1), 202-212 (1986-07-01)
We evaluated four different fluoroprobes to determine their capabilities and limitations in measuring intracellular pH by the fluorescent indicator technique. In vitro, carboxyfluorescein, dimethylcarboxyfluorescein, biscarboxyethyl carboxyfluorescein, and 4-methylumbelliferone (4MU) all showed comparably intense fluorescence and excellent pH sensitivity near their
S Mordon et al.
Journal of photochemistry and photobiology. B, Biology, 13(3-4), 307-314 (1992-05-15)
The pH of the interstitial fluid of malignant tumours tends to be lower than that of normal tissue and is depressed by glucose administration. This study aimed to evaluate the effectiveness of dual-wavelength fluorometry using a pH-dependent indicator (5,6-carboxyfluorescein: 5,6-CF)
Charlemagne Gnoula et al.
Talanta, 71(5), 1886-1892 (2007-03-30)
A new in vitro assay for anthelmintic activity using Caenorhabditis elegans is based on the ability of 5(6)-carboxyfluorescein diacetate (CFDA) to indicate the worm's viability. It is shown for the first time that the treatment of a suspension of worms
Jorien Claes et al.
Blood, 124(10), 1669-1676 (2014-06-22)
Adhesion of Staphylococcus aureus to blood vessels under shear stress requires von Willebrand factor (VWF). Several bacterial factors have been proposed to interact with VWF, including VWF-binding protein (vWbp), a secreted coagulase that activates the host's prothrombin to generate fibrin.
D F Babcock
The Journal of biological chemistry, 258(10), 6380-6389 (1983-05-25)
Fluorescein and carboxyfluorescein have found recent application as probes of intracellular pH. The present study examines several parameters required for interpretation of the spectral information derived from fluorescein and carboxyfluorescein generated intracellularly from their permeant diacetate derivatives. Coefficients were determined
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