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21882

Sigma-Aldrich

5(6)-Carboxy-2′,7′-dichlorofluorescein

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

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About This Item

Empirical Formula (Hill Notation):
C21H10Cl2O7
CAS Number:
111843-78-8
Molecular Weight:
445.21
MDL number:
MFCD00037452
UNSPSC Code:
12352108
PubChem Substance ID:
57647948
NACRES:
NA.32

product line

BioReagent

Assay

≥95% (TLC)

form

solid

pKa 

5.1

mp

≥250 °C (lit.)

solubility

DMF: soluble
DMSO: soluble
H2O: soluble (pH ≥ 5)

fluorescence

λex 504 nm; λem 529 nm in 0.1 M Tris pH 8.0

suitability

suitable for fluorescence

SMILES string

OC(=O)c1ccc(c(c1)C(O)=O)C2=C3C=C(Cl)C(=O)C=C3Oc4cc(O)c(Cl)cc24.OC(=O)c5ccc(C(O)=O)c(c5)C6=C7C=C(Cl)C(=O)C=C7Oc8cc(O)c(Cl)cc68

InChI

1S/2C21H10Cl2O7/c22-13-4-11-17(6-15(13)24)30-18-7-16(25)14(23)5-12(18)19(11)10-3-8(20(26)27)1-2-9(10)21(28)29;22-13-4-11-17(6-15(13)24)30-18-7-16(25)14(23)5-12(18)19(11)9-2-1-8(20(26)27)3-10(9)21(28)29/h2*1-7,24H,(H,26,27)(H,28,29)

InChI key

WHFHRELKGQJJBQ-UHFFFAOYSA-N

Application

5(6)-Carboxy-2′,7′-dichlorofluorescein may be used as a specific substrate/probe to study the identity, activity and specificity of multidrug resistance protein 2 (MRP2) molecules.
suitable as pH-indicator

Other Notes

Fluorescent intracellular pH indicator in the pH 4-5 range

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

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)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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M Nedergaard et al.
Analytical biochemistry, 187(1), 109-114 (1990-05-15)
Derivatives of fluorescein sensitive to pH are extensively utilized for the determination of intracellular pH (pHi). Available dyes have pKa values of approximately 7.0, and are not well suited for measuring acidic pHi. We examined the fluorescein derivative, 5 (and
Phyllanthin and hypophyllanthin inhibit function of P-gp but not MRP2 in Caco-2 cells.
Sukhaphirom N, Vardhanabhuti N, et al.
J. Pharm. Pharm. Sci., 65, 292-299 (2013)
B Laupèze et al.
Life sciences, 68(11), 1323-1331 (2001-03-10)
Multidrug resistance proteins (MRPs) such as MRP1, MRP2 and MRP3 are membrane efflux pumps involved in multidrug resistance and handling organic anions. In the present study, MRP activity was investigated in normal mature leucocytes and CD34-positive hematopoietic cells from peripheral
Ekkehard Stehfest et al.
Archives of toxicology, 80(3), 125-133 (2005-12-24)
Defense against toxic endo- and xenobiotics is a major concern of all living species and ABC transporters play a vital role in this defense system. Multidrug resistance associated proteins 1 (MRP1) is a cellular detoxifying factor supposed to transport a
Susan Pratt et al.
European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences, 27(5), 524-532 (2005-12-13)
Multidrug resistance protein-5 (MRP5, ABCC5) is a member of the ATP-binding cassette transporter superfamily that effluxes a broad range of natural and xenobiotic compounds such as cyclic GMP, antiviral compounds, and cancer chemotherapeutic agents including nucleoside-based drugs, antifolate agents and
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