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410217

Sigma-Aldrich

2′,7′-Dichlorofluorescein

ACS reagent

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Synonym(s):
Dichlorofluorescein; Fluorescein 27
Empirical Formula (Hill Notation):
C20H10Cl2O5
CAS Number:
76-54-0
Molecular Weight:
401.20
Beilstein:
58009
EC Number:
200-968-6
MDL number:
MFCD00005047
UNSPSC Code:
12171500
PubChem Substance ID:
24865700
NACRES:
NA.47

grade

ACS reagent

Quality Level

200

form

powder

color

orange to red-brown, powder

mp

280 °C (dec.) (lit.)

solubility

alcohol: passes test

density

0.790 g/cm3

λmax

509 nm

suitability

passes test for adsorption indicator

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

Oc1cc2Oc3cc(O)c(Cl)cc3C4(OC(=O)c5ccccc45)c2cc1Cl

InChI

1S/C20H10Cl2O5/c21-13-5-11-17(7-15(13)23)26-18-8-16(24)14(22)6-12(18)20(11)10-4-2-1-3-9(10)19(25)27-20/h1-8,23-24H

InChI key

VFNKZQNIXUFLBC-UHFFFAOYSA-N

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General description

2′,7′-Dichlorofluorescein is an oxidation-sensitive fluorescent probe.

Application

2′,7′-Dichlorofluorescein has been used to measure ROS (reactive oxygen species) formation in cells. It has been used as a fluorogenic substrate to study the peroxidase activity of saliva samples and extracts obtained from submandibular glands.

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

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    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. What can be used to make a solution of 2´,7´-dichlorofluorescein?

    2´,7´-Dichlorofluorescein is soluble at 25 mg/mL absolute ethanol with heating. 2´,7´-Dichlorofluorescein is also soluble in water at 0.1 mg/mL.

  6. In what types of applications can 2´,7´-Dichlorofluorescein be used?

    Some applications for use of 2´,7´-Dichlorofluorescein are listed below. This product can be used for the determination of carbohydrates by fluorescence densitometry after TLC.  See G. Gübitz et al., J. Chromatogr., 117, 337, (1976). 2´,7´-Dichlorofluorescein as also been used in the determination of H2O2 by chemiluminescence. See the following references by H. Watanabe et al. Anal. Sci. 2, 461, (1986) and T. Segawa et al. Anal. Sci. 6, 763, (1990). This product has also been used as a  fluorescent additive used in indirect fluorimetric detection in OTC-HPLC. See W.D. Pfeffer and E.S. Yeung, J. Chromatogr., 506, 401, (1990).

  7. What excitation /emission wavelengths are best for fluorescence detection of 2´,7´-Dichlorofluorescein?

    2´,7´-Dichlorofluorescein can be detected at an excitation wavelength at 504 nm and emission wavelength at 529 nm in 0.1 M Tris pH 8.0.

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