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 chemicals encyclopedia published by the Royal Society of Chemistry, with information for Genistin under that heading.According to the chemicals encyclopedia published by the Royal Society of Chemistry, 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."
73822
Genistin
analytical standard
Sinônimo(s):
4′,5,7-Trihydroxyisoflavone 7-glucoside, Genistein 7-glucoside, Genistein-7-O-β-D-glucopyranoside, Genistoside, NSC 5112
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About This Item
Produtos recomendados
grau
analytical standard
Nível de qualidade
Ensaio
≥98.0% (HPLC)
prazo de validade
limited shelf life, expiry date on the label
técnica(s)
HPLC: suitable
gas chromatography (GC): suitable
aplicação(ões)
food and beverages
Formato
neat
temperatura de armazenamento
2-8°C
cadeia de caracteres SMILES
OC[C@H]1O[C@@H](Oc2cc(O)c3C(=O)C(=COc3c2)c4ccc(O)cc4)[C@H](O)[C@@H](O)[C@@H]1O
InChI
1S/C21H20O10/c22-7-15-18(26)19(27)20(28)21(31-15)30-11-5-13(24)16-14(6-11)29-8-12(17(16)25)9-1-3-10(23)4-2-9/h1-6,8,15,18-24,26-28H,7H2/t15-,18-,19+,20-,21-/m1/s1
chave InChI
ZCOLJUOHXJRHDI-CMWLGVBASA-N
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Descrição geral
Aplicação
- Legumes by ultra-high performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS) with electrospray ionization (ESI) source and multiple reaction monitoring (MRM) detection.[2]
It may be used as an analytical reference standard for the determination of genistin in:
- Soy-based foods and dietary supplements by LC coupled to absorbance detection and isotope-dilution mass spectrometry (IDMS), equipped with ESI source and selected ion monitoring (SIM) mode.[3]
- Soy products by colloidal gold-based indirect competitive immunochromatographic assay (ICA).[1]
- Rainbow trout muscle by QuEChERS (quick, easy, cheap, effective, rugged and safe) extraction and LC-ESI-MS/MS.[4]
- Soybean flour by matrix solid phase dispersion extraction (MSPD) and LC with ultraviolet-diode array detection (UV-DAD).[5]
- Soymilk samples by HPLC-UV operating under the gradient elution mode.[6]
Ações bioquímicas/fisiológicas
Embalagem
Outras notas
Código de classe de armazenamento
11 - Combustible Solids
Classe de risco de água (WGK)
WGK 3
Ponto de fulgor (°F)
Not applicable
Ponto de fulgor (°C)
Not applicable
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What is the lambda max for genistin and what is the molar extinction coefficient at that wavelength?
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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.
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