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Merck

E8751

Ethidium bromide

~95% (HPLC)

Synonyme(s) :

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

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About This Item

Formule empirique (notation de Hill) :
C21H20BrN3
Numéro CAS:
1239-45-8
Poids moléculaire :
394.31
UNSPSC Code:
41105322
NACRES:
NB.22
PubChem Substance ID:
24894683
EC Number:
214-984-6
Beilstein/REAXYS Number:
3642536
MDL number:
MFCD00011724

Nom du produit

Ethidium bromide, ~95% (HPLC)

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

SMILES string

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

assay

~95% (HPLC)

mp

260-262 °C (dec.) (lit.)

Quality Level

200

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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.

Frameshift mutagen which intercalates double-stranded DNA and RNA.

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.

Preparation Note

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.

pictograms

Skull and crossbonesHealth hazard
GHS06,GHS08

signalword

Danger

Hazard Classifications

Acute Tox. 1 Inhalation - Acute Tox. 4 Oral - Muta. 2

Classe de stockage

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

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Certificats d'analyse (COA)

Lot/Batch Number
SHBT1421
SHBS8107
SHBS3878
SHBR4830
SHBQ7920

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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.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. What is the best working concentration of Product E8751, Ethidium bromide?

    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.  Ethidium bromide can also be incorporated into the gel and running buffer at 0.5 μg/mL, and visualized immediately after electrophoresis.

  5. How can I make a stock solution of Product E8751, Ethidium bromide?

    Ethidium bromide is soluble in water at 100 mg/mL. Per Crary, B. and Boyrsenko, M., Biotechniques, 4, 98-101 (1986), stock solutions of ethidium bromide in water or PBS are stable for at least two years at room temperature if protected from light.

  6. How can I dispose of solutions containing Product E8751, Ethidium bromide?

    Ethidium bromide is mutagenic, and ultimately has to be destroyed by incineration. It can be removed from buffer solutions by several methods to reduce the volume of waste. See the product sheet for more details.

  7. What is the Department of Transportation shipping information for this product?

    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. 

  8. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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