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45245

Sigma-Aldrich

Eosin 5-isothiocyanate

≥95.0% (UV)

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Synonym(s):
EITC
Empirical Formula (Hill Notation):
C21H7Br4NO5S
CAS Number:
60520-47-0
Molecular Weight:
704.96
MDL number:
MFCD00082502
UNSPSC Code:
12352200
PubChem Substance ID:
57650268

Assay

≥95.0% (UV)

fluorescence

λex 521; λem 544 (pH 9.0)

storage temp.

2-8°C

SMILES string

OC(=O)c1cc(ccc1C2=C3C=C(Br)C(=O)C(Br)=C3Oc4c(Br)c(O)c(Br)cc24)N=C=S

InChI

1S/C21H7Br4NO5S/c22-12-4-10-14(8-2-1-7(26-6-32)3-9(8)21(29)30)11-5-13(23)18(28)16(25)20(11)31-19(10)15(24)17(12)27/h1-5,27H,(H,29,30)

InChI key

MCXYFYWNOWPDMA-UHFFFAOYSA-N

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Application

Eosin 5-isothiocyanate (EITC) is a fluorescence probe. EITC tagged molecules may be used together with fluorescein-5′-isothiocyanate (FITC) tagged molecules in fluoresce resonance energy transfer (FRET) based assays.

Other Notes

Acceptor fluorophore. Measurement of rotational diffusion of proteins; In fluorescence energy transfer studies

Pictograms

Health hazard
GHS08

Signal Word

Danger

Hazard Statements

H317 - H334

Precautionary Statements

P261 - P280 - P342 + P311

Hazard Classifications

Resp. Sens. 1 - Skin Sens. 1

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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S Q Liu et al.
The American journal of physiology, 264(5 Pt 1), C1155-C1164 (1993-05-01)
Although eosin-5-maleimide (EM) covalently labels band 3 and has been thought to react at the external-facing anion transport site, EM reversibly inhibits Cl- exchange at 0 degrees C in a noncompetitive fashion, indicating that under these conditions it does not
T Chiba et al.
Biochimica et biophysica acta, 897(1), 14-24 (1987-02-12)
The characteristics of the anion transport system in human erythrocyte, which can be modified by eosin 5-isothiocyanate (EITC), were studied using the pH titration method and by measuring the sulfate efflux. Based on the pH dependence of EITC binding to
Ryan R Hansen et al.
Analytical and bioanalytical chemistry, 392(1-2), 167-175 (2008-07-29)
Quantitative evaluation of minimal polynucleotide concentrations has become a critical analysis among a myriad of applications found in molecular diagnostic technology. Development of high-throughput, nonenzymatic assays that are sensitive, quantitative and yet feasible for point-of-care testing are thus beneficial for
T J Deerinck et al.
The Journal of cell biology, 126(4), 901-910 (1994-08-01)
A simple method is described for high-resolution light and electron microscopic immunolocalization of proteins in cells and tissues by immunofluorescence and subsequent photooxidation of diaminobenzidine tetrahydrochloride into an insoluble osmiophilic polymer. By using eosin as the fluorescent marker, a substantial
Valeria Levi et al.
Biochimica et biophysica acta, 1599(1-2), 141-148 (2002-12-14)
Self-association of bovine serum albumin (BSA) was explored using fluorescence resonance energy transfer (FRET) between two populations of the protein labeled separately with either fluorescein-5'-isothiocyanate (FITC) or eosin-5'-isothiocyanate (EITC). The energy transfer reached the steady state after 5 s at
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