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S9430 Sigma-Aldrich

SYBR® Green I nucleic acid gel stain

Green Alternative

10,000 × in DMSO



Legal Information

U.S. Patent No. 5,436,134. Licensed from Molecular Probes, Inc.

SYBR is a registered trademark of Life Technologies


A proprietary unsymmetrical cyanine dye which is an ultrasensitive stain for post-electrophoresis staining of dsDNA in agarose or polyacrylamide gels. SYBR Green I can also be used to detect ssDNA and RNA in denaturing agarose/formaldehyde and polyacrylamide/urea gels without any prewashing steps, although the sensitivity is lower (approximately 100 to 300 pg per band using 254 nm epi-illumination). SYBR Green II is recommended for ss-DNA and RNA.

SYBR Green I stain has been shown to be much less mutagenic than ethidium bromide in Ames tests. SYBR Green I is also a very sensitive stain for oligonucleotides, allowing for detection of as little as 1-2 ng of a synthetic 24-mer on a 5% polyacrylamide gel, which is 50-100 times greater sensitivity than obtained with ethidium bromide. Staining agarose gels with SYBR Green I does not interfere with the transfer of nucleic acids to membranes or subsequent hybridization in Southern or Northern blot analysis as long as 0.1%-0.3% SDS is included in prehybridization and hybridization buffers to remove the dye.

Sigma Life Science is committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has inherently safer chemistry, compared to the standard use of ethidium bromide for staining. For more information see publication found in related content.

SYBR® Green I nucleic acid gel stain has been used for real-time PCR quantification and flow cytometry.

Storage and Stability

Store the product at –20 °C. The diluted Staining Solution may be stored, protected from light, either at 2–8 °C for several weeks or at room temperature for 3–4 days.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
201.2 °F
Flash Point(C) 
94 °C

Frequently Asked Questions

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.
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.
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 orview local office numbers.
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.
WillProductS9430, SYBR® Green I nucleic acid gel stain, stain DNA that contains deaza-G modified nucleotides in place of guanisine?
Product S9430, SYBR® Green I nucleic acid gel stain, will poorly stain DNA containing deaza-G modified nucleotides in place of guanisine. A way around this issue would be to use a mixture of deaza-G modified nucleotides with guanisine. This will allow for better staining.
My question is not addressed here, how can I contact Technical Service for assistance?
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01494 Nancy-520, suitable for RT-PCR, ≥97.0% (HPCE)

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