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
375368
HEPES
≥99% dry basis (titration), 1M solution, amniosulfonic acid buffer
Synonym(s):
HEPES, 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid, N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid)
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About This Item
Product Name
HEPES, ULTROL® Grade, ≥99% dry basis (titration), 1M zwitterionic N-substituted aminosulfonic acid buffer
Quality Segment
description
Merck USA index - 144654
assay
≥99% dry basis (titration)
form
solution
manufacturer/tradename
Calbiochem®
storage condition
OK to freeze
color
clear colorless
useful pH range
6.8-8.2
pKa (25 °C)
7.5
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
Physical form
Legal Information
Disclaimer
1 of 1
This Item | |||
|---|---|---|---|
| assay ≥99% dry basis (titration) | assay ≥99% dry basis (titration) | assay ≥99% (titration) | assay ≥99.5% (titration) |
| Quality Level 100 | Quality Level 100 | Quality Level 200 | Quality Level 400 |
| form solution | form crystalline powder | form crystalline | form crystalline powder |
| storage condition OK to freeze | storage condition OK to freeze | storage condition (Tightly closed. Dry) | storage condition dry at room temperature |
| storage temp. 15-25°C | storage temp. 15-25°C | storage temp. room temp | storage temp. - |
| color clear colorless | color white | color white | color white |
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Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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