If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf
Wichtige Dokumente
D8130
5,5′-Dithiobis(2-nitrobenzoesäure)
≥98%, BioReagent, suitable for determination of sulfhydryl groups
Synonym(e):
3-Carboxy-4-nitrophenyldisulfid, 6,6′-Dinitro-3,3′-dithio-dibenzoesäure, Bis-(3-carboxy-4-nitrophenyl)-disulfid, DTNB, Ellmans Reagens
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About This Item
Empfohlene Produkte
Produktlinie
BioReagent
Assay
≥98%
Form
powder
mp (Schmelzpunkt)
240-245 °C (dec.) (lit.)
Eignung
suitable for determination of sulfhydryl groups
SMILES String
OC(=O)c1cc(SSc2ccc(c(c2)C(O)=O)[N+]([O-])=O)ccc1[N+]([O-])=O
InChI
1S/C14H8N2O8S2/c17-13(18)9-5-7(1-3-11(9)15(21)22)25-26-8-2-4-12(16(23)24)10(6-8)14(19)20/h1-6H,(H,17,18)(H,19,20)
InChIKey
KIUMMUBSPKGMOY-UHFFFAOYSA-N
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Allgemeine Beschreibung
Anwendung
Lagerklassenschlüssel
11 - Combustible Solids
WGK
WGK 3
Flammpunkt (°F)
Not applicable
Flammpunkt (°C)
Not applicable
Persönliche Schutzausrüstung
dust mask type N95 (US), Eyeshields, Gloves
Hier finden Sie alle aktuellen Versionen:
Analysenzertifikate (COA)
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Protokolle
To measure chloramphenicol acetyltransferase activity, this procedure uses DTNB and coenzyme A. The reaction of DTNB with the –SH group on CoA results in a colorimetric increase at 412 nm.
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How can I determine the shelf life / expiration / retest date of this product?
1 Antwort-
Hilfreich?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 Antwort-
Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
Hilfreich?
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To dissolve DTNB which alcohol should use?
1 Antwort-
This product is tested for solubility in Ethanol at 10 mg/mL. Solutions may also be prepared at 5mM in 100 mM sodium or potassium phosphate buffer, pH 7.2, containing 0.1 mM EDTA. Please see the link below to review the entire product datasheet for additional information:
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/414/707/d8130pis.pdfHilfreich?
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what is the storage temperature for this chemical
1 Antwort-
This product can be stored at room temperature.
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