Trace metal analysis is not performed on this product. The iron and zinc levels are not determined. However, testing for product 54457, HEPES for molecular biology, BioUltra, does include trace metal analysis, included iron and zinc. Please see the link below to review a sample or lot-specific Certificate of Analysis for the 54457, HEPES.
https://www.sigmaaldrich.com/US/en/product/sigma/54457#product-documentation
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A propos de cet article
Quality Segment
assay
≥99.5% (titration)
form
crystalline powder
storage condition
dry at room temperature
technique(s)
cell culture | mammalian: suitable
color
white
pH
5.0-6.5 (25 °C, 238 g/L)
useful pH range
6.8-8.2
pKa (25 °C)
7.5
solubility
water: 500 mg/mL, clear, colorless
suitability
suitable for component for culture media, suitable for enzyme extraction
application(s)
advanced drug delivery
diagnostic assay manufacturing
general analytical
life science and biopharma
pharmaceutical
SMILES string
OCCN1CCN(CC1)CCS(O)(=O)=O
InChI
1S/C8H18N2O4S/c11-7-5-9-1-3-10(4-2-9)6-8-15(12,13)14/h11H,1-8H2,(H,12,13,14)
InChI key
JKMHFZQWWAIEOD-UHFFFAOYSA-N
General description
Largement utilisé en culture cellulaire, l'HEPES excelle dans le maintien d'un pH physiologique malgré les fluctuations de la concentration en dioxyde de carbone dues à la respiration cellulaire, un aspect moins marqué dans les tampons bicarbonate. Il sert de séparateur ampholyte pour créer des gradients de pH en focalisation isoélectrique et interfère moins avec les réactions des enzymes de restriction que les tampons avec moins de groupements amine substitués comme le Tris. Outre ces applications, l'HEPES peut être utilisé dans différentes études biologiques et biochimiques, notamment en immunoprécipitation, dans la lyse cellulaire et dans l'imagerie de cellules vivantes. Sa polyvalence en fait un outil indispensable dans différentes applications de recherche.
Application
- Comme constituant du milieu de Danieau, qui est utilisé pour prévenir la formation de pigment de mélanine post gastrulation chez l'embryon de poisson-zèbre
- Comme constituant de la solution de Hanks utilisée dans les tests de dégradation du fer
- Comme constituant du milieu HEPES utilisé en transfection de cultures cellulaires avec des plasmides
- Avec le RPMI-1640, la L-glutamine, le FBS, le pyruvate de sodium et le β-mercaptoéthanol pour la culture de cellules d'insulinomes de rat
- En tant que supplément au milieu TCM199 pour laver les ovocytes frais requis pour des études de transfert nucléaire
Features and Benefits
- Produit de grande pureté pour la recherche en biochimie et en biologie.
- Convient à la culture cellulaire.
- Grande solubilité dans l'eau avec une plage de pH utile allant de 6,8 à 8,2 et un pKa de 7,5 à 25 °C.
Other Notes
Comparez facilement les spécifications de nos produits HEPES grâce au Tableau des spécifications des produits à base d'HEPES.
Legal Information
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Cet article | |||
|---|---|---|---|
| technique(s) cell culture | mammalian: suitable | technique(s) - | technique(s) cell culture | embryo: suitable | technique(s) - |
| assay ≥99.5% (titration) | assay ≥99.5% (titration) | assay ≥99.5% (titration) | assay ≥99.5% |
| Quality Level 400 | Quality Level 400 | Quality Level 400 | Quality Level 100 |
| form crystalline powder | form powder | form powder | form crystalline powder |
| application(s) advanced drug delivery | application(s) diagnostic assay manufacturing | application(s) - | application(s) - |
| solubility water: 500 mg/mL, clear, colorless | solubility H2O: 1 M, clear, colorless | solubility water: 500 mg/mL, clear, colorless | solubility water: 500 mg/mL, clear, colorless |
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Classe de stockage
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Hello, Is it possible that there are traces of iron or zinc in the final product ? Thank you
1 answer-
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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/418/501/product-dating-information-06-25-mk.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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
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What concentration of HEPES should be used for cell culture without CO2, to maintain optimal pH?
1 answer-
This product has not been tested for cell culture use. A better choice is H4034 HEPES BioPerformance Certified, ?99.5% (titration), suitable for cell culture, or one of the other products referred to in the Technical Bulletin found in the documentation section of the product page:
https://www.sigmaaldrich.com/product/sigma/h4034#product-documentationHelpful?
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What is the purpose of using HEPES in cell culture?
1 answer-
HEPES provides supplemental buffering for media in pH range of 7.2 to 7.6. It has no nutritional value to cells.
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What is the Department of Transportation shipping information for this product?
1 answer-
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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What is the concentration of HEPES used in cell culture?
1 answer-
HEPES is typically used in cell culture in the range of 10-25 mM.
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