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09-0617

Sigma-Aldrich

Ethidium bromide solution

10 mg/mL

Sinónimos:

3,8-Diamino-5-ethyl-6-phenylphenanthridinium bromide, EtBr, Homidium bromide

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About This Item

Fórmula empírica (notación de Hill):
C21H20BrN3
Número de CAS:
1239-45-8
Peso molecular:
394.31
Beilstein/REAXYS Number:
3642536
MDL number:
MFCD00011724
UNSPSC Code:
12161505
PubChem Substance ID:
329748667

form

liquid

availability

available only in Japan

concentration

10 mg/mL

SMILES string

[Br-].CC[n+]1c(-c2ccccc2)c3cc(N)ccc3c4ccc(N)cc14

InChI

1S/C21H19N3.BrH/c1-2-24-20-13-16(23)9-11-18(20)17-10-8-15(22)12-19(17)21(24)14-6-4-3-5-7-14;/h3-13,23H,2,22H2,1H3;1H

InChI key

ZMMJGEGLRURXTF-UHFFFAOYSA-N

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Application

Ethidium bromide (EtBr) is the most commonly used nucleic acid stain for PAGE or agarose gel electrophoresis. The fluorescence of EtBr increases 21-fold upon binding to double-stranded RNA and 25-fold on binding double-stranded DNA so that destaining the background is not necessary with a low stain concentration (10 μg/ml). Ethidium bromide has been used in a number of fluorimetric assays for nucleic acids. It has been shown to bind to single-stranded DNA (although not as strongly) and triple-stranded DNA. Because of its ability to bind to DNA, EtBr is an inhibitor of DNA polymerase.

Biochem/physiol Actions

Ethidium bromide intercalates double-stranded DNA and RNA and acts as a frameshift mutagen. It can also be used in conjunction with acridine orange to differentiate between viable, apoptotic and necrotic cells.

Suitability

for biological purposes

Reconstitution

For staining a gel after electrophoresis, dilute a sample of the stock solution to 0.5 μg/ml with water and incubate the gel for 15-30 min. Destaining is usually not needed but can be carried out in water for 15 min if decreased background is necessary. The DNA bands can then be detected on a UV light box (254 nm wavelength). Ethidium bromide can also be incorporated into the gel and running buffer at 0.5 μg/ml and visualized immediately after electrophoresis.

Related product

Referencia del producto
Descripción
Precios

pictograms

Skull and crossbonesHealth hazard
GHS06,GHS08

signalword

Danger

hcodes

H331,H341

Hazard Classifications

Acute Tox. 3 Inhalation - Muta. 2

Storage Class

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificados de análisis (COA)

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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