Ethidium bromide (solution) 

Ethidium bromide (solution) is an intercalating agent commonly used as a fluorescent tag (nucleic acid stain) in molecular biology laboratories for techniques such as agarose gel electrophoresis.
Solvent and Concentration: Sterile water: 10 mg/Ml

Guide (Following is our recommended protocol. This protocol only provides a guideline, and should be modified according to your specific needs).
The preparation of agarose gel:
1. Agarose gels are commonly used in concentrations of 0.5% to 2.5% depending on the size of bands needed to be separated.
2. Mix the agarose powder with 1 X TAE/TBE.
3. Microwave for 1-3 min until the agarose is completely dissolved (Caution: not overboil).
4. Make the solution cool down before solidification.
5. Add ethidium bromide (EtBr) to a final concentration of approximately 0.2-0.5 μg/mL (Stocks are generally 10 mg/mL, and require 5 μL stock/100 mL gel).
6. Ethidium bromide binds to the DNA and you could visualize the DNA under ultraviolet (UV) light.
CAUTION: EtBr is a known mutagen. Please pay attention to strengthening protection.

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

394.31

C₂₁H₂₀BrN₃

1239-45-8

Liquid (Density: 1.3739 g/cm³)

Brown to red

CC[N+]1=C(C2=CC(N)=CC=C2C3=C1C=C(C=C3)N)C4=CC=CC=C4.[Br-]

Room temperature in continental US; may vary elsewhere.

Please store the product under the recommended conditions in the Certificate of Analysis.

• [1]. P Stevenson, et al. Comparison of isometamidium chloride and homidium bromide as prophylactic drugs for trypanosomiasis in cattle at Nguruman, Kenya. Acta Trop. 1995 May;59(2):77-84.  [Content Brief]

  [2]. Sabnis, Ram Wasudeo (2010). Handbook of Biological Dyes and Stains: Synthesis and Industrial Application. Hoboken, NJ: Wiley. ISBN 978-0-470-40753-0.