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HEPES

≥99% (alkalimetric), solid, pH 6.8-8.2, Molecular Biology

Synonym(e):

HEPES, 4-(2-Hydroxyethyl)-piperazin-1-ethansulfonsäure

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Über diesen Artikel

Empirische Formel (Hill-System):
C8H18N2O4S
CAS-Nummer:
Molekulargewicht:
238.30
NACRES:
NA.25
UNSPSC Code:
12161704
MDL number:
Beilstein/REAXYS Number:
883043


Produktname

HEPES, freie Säure, molekularbiologische Qualität, A zwitterionice N-substituted aminosulfonic acid buffer. Useful in the pH 6.8-8.2 range. Has a pKa of 7.48 at 25°C.

grade

Molecular Biology

Quality Segment

description

Merck USA index - 14, 4654

assay

≥99% (alkalimetric)

form

solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze

color

white

useful pH range

6.8-8.2

pKa (25 °C)

7.5

solubility

water: 400 mg/mL, aqueous base: soluble

cation traces

heavy metals: ≤0.0005%

foreign activity

DNase, RNase, and protease, none detected

shipped in

ambient

storage temp.

15-25°C

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

Ein zwitterionischer N-substituierter Aminosulfonsäure-Puffer. Für die Anwendung im pH-Bereich 6,8 - 8,2. Der pKs-Wert bei 25 °;C beträgt 7,48.

Application


  • Fluorescent labeling of the root cap cells with the bioactive NBD-S chemical probe based on the cellulose biosynthesis inhibition herbicides: Diese innovative Studie demonstriert die Anwendung von HEPES in molekularbiologischer Qualität bei der Formulierung bioaktiver Sonden für die Fluoreszenzmarkierung von Wurzelhaubenzellen. Unter Verwendung von Herbiziden zur Hemmung der Zellulosebiosynthese als Modellsystem liefert diese Forschungsarbeit wertvolle Einblicke in die Pflanzenbiologie und hilft beim Verständnis der Zellwandstrukturen und -funktionen von Pflanzen. Die Verwendung von HEPES trägt dazu bei, den physiologischen pH-Wert während der Experimente aufrechtzuerhalten und gewährleistet die Stabilität und Wirksamkeit der verwendeten chemischen Sonden (Tamogami S et al., 2021).

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Disclaimer

Toxizität: Standard-Handhabung (A)


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Lagerklasse

13 - Non Combustible Solids

Was ist los?

WGK 1

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable



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Questions

1–2 of 2 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. 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.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. 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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