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48756 Sigma

Genistin

≥97.5% (TLC)

Synonym: 4′,5,7-Trihydroxyisoflavone 7-glucoside, Genistein 7-glucoside, Genistein-7-O-β-D-glucopyranoside, NSC 5112

  • CAS Number 529-59-9

  • Empirical Formula (Hill Notation) C21H20O10

  • Molecular Weight 432.38

  •  Beilstein Registry Number 64479

  •  MDL number MFCD00016883

  •  PubChem Substance ID 57651161

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Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Biochem/physiol Actions

Selective inhibitor of mammalian terminal deoxynucleotidyl transferase (TdT), with no measurable effect on mammalian or microbial DNA polymerases.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. 48756.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin.

Price and Availability


All labs need water
Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3
RTECS 
DJ3093000

Documents

Certificate of Analysis

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. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
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. 
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, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
What is the lambda max for genistin and what is the molar extinction coefficient at that wavelength?
We have data from our QC labs here at Sigma on one of the Genistin products we offer, G0897. The solvent is 85% ethanol/15% water, and the lambda max is typically 262.0 or 262.5 nm. We measured the molar extinction coefficients at the lambda max for four different lots of G0897 back in the 1990s, and the average value was 39,800 M-1. Genistin is a derivative of Genistein. There is an entry for Genistein in the Merck Index, with information for Genistin under that heading. According to the Merck Index, 14th edition, entry #4391, "uv max (85% ethanol) 262.5 nm (a 90.5)". The value of "a 90.5" is the same as an E0.1%, or the extinction coefficient for a 1 mg/mL (or 1 gram per Liter) solution. If one multiplies 90.5 (L/g) by the molecular weight of genistin (432.38 g/mole), you get 39,130 M-1. This is pretty close to the value of 39,800 from our data above.
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Protocols & Articles

Articles

HPLC Analysis of Isoflavones in Soy Milk on Ascentis® Express RP Amide (Milk Brand 1)

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Isoflavones in Soy Milk on Ascentis® Express RP Amide (Milk Brand 1)
Keywords: Chromatography, High performance liquid chromatography, Hormones, Separation

HPLC Analysis of Isoflavones in Soy Milk on Ascentis® Express RP Amide (Milk Brand 2)

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Isoflavones in Soy Milk on Ascentis® Express RP Amide (Milk Brand 2)
Keywords: Chromatography, High performance liquid chromatography, Hormones, Separation

HPLC Analysis of Isoflavones on Ascentis® Phenyl

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Isoflavones on Ascentis® Phenyl
Keywords: Chromatography, High performance liquid chromatography, Mass spectrometry, Vitamins

Peer-Reviewed Papers
15

References

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