This product is not suitable for the Limulus Amebocyte Lysate test method (LAL). Specifications for this product are available in the documents section of the webpage, but pyrogen levels are not specified. This product is not certified as pyrogen-free and is not sterile. This product is intended for use as a solvent for High-Performance Liquid Chromatography mobile phases.
270733
Água
Water
1 of 1 reviewers received a sample product or took part in a promotion
suitable for HPLC
Sinônimo(s):
Aqua, Óxido de di-hidrogênio
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About This Item
Fórmula linear:
H2O
Número CAS:
Peso molecular:
18.02
Beilstein:
2050024
Número CE:
Número MDL:
Código UNSPSC:
12190000
ID de substância PubChem:
NACRES:
NA.21
Preço e disponibilidade não estão disponíveis no momento.
Produtos recomendados
grau
HPLC grade
Nível de qualidade
densidade de vapor
<1 (vs air)
pressão de vapor
3 mmHg
Formulário
liquid
técnica(s)
HPLC: suitable
resíduo de evaporação
<0.0003%
índice de refração
n20/D 1.34 (lit.)
pH
6.0-8.0 (25 °C)
p.e.
100 °C (lit.)
pf
0 °C (lit.)
densidade
1.000 g/mL at 3.98 °C (lit.)
λ
H2O reference
Absorção UV
λ: 205 nm Amax: 0.01
λ: 210 nm Amax: 0.01
λ: 250-400 nm Amax: 0.005
cadeia de caracteres SMILES
O
InChI
1S/H2O/h1H2
chave InChI
XLYOFNOQVPJJNP-UHFFFAOYSA-N
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Categorias relacionadas
Descrição geral
A água adequada para HPLC é comumente usada como um solvente para eluição isocrática tanto na cromatografia de cátions quanto de ânions. Além disso, é usada como um componente para preparar soluções-estoque padrão e para evaporação sob um fluxo de nitrogênio em banho-maria para concentrar a amostra antes da análise LC-MS-MS.[1] [2]
Aplicação
Embalagem
M-Bottle for Solvents
As a global leader in lab reagents, we are constantly looking for new ways to optimize the safety of our products. The newly developed 4L solvent bottle design features advanced sealing technology that eliminates leaks to make the handling of solvents safer and more convenient than ever before.
See all the new features here!
As a global leader in lab reagents, we are constantly looking for new ways to optimize the safety of our products. The newly developed 4L solvent bottle design features advanced sealing technology that eliminates leaks to make the handling of solvents safer and more convenient than ever before.
See all the new features here!
Nota de preparo
Produto filtrado em filtro de 0,2 μm
Outras notas
Aviso importante
O artigo número 270733-6X1L será descontinuado. Encomende o frasco único 270733-1L, que é fisicamente idêntico, com exatamente as mesmas especificações.
O artigo número 270733-6X1L será descontinuado. Encomende o frasco único 270733-1L, que é fisicamente idêntico, com exatamente as mesmas especificações.
Código de classe de armazenamento
12 - Non Combustible Liquids
Classe de risco de água (WGK)
nwg
Ponto de fulgor (°F)
Not applicable
Ponto de fulgor (°C)
Not applicable
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Protocolos
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Is this water suitable for lal test method ? Is pyrogen free ? Is there a specification?
1 answer-
Helpful?
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Will dispensing small quantities and resealing the container lead to air dissolving in the water? I intend to use 50ml-100ml for my experiments.
1 answer-
Opening a container that is not isolated from the atmosphere could results in ambient air dissolving in the water remaining inside the container. The rate of of air introduction would need to be monitored for a given set of conditions such as temperature, air exchange in the laboratory, and relative humidity.
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Do you know the resistivity value @ 25°C?
1 answer-
The resistivity of this product has not been determined.
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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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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/449/386/product-dating-information-mk.pdfHelpful?
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How is this water purified? is it distilled?
1 answer-
The water purification process involves several steps:
• The water initially passes through a carbon exchange tank to remove organic compounds.
• It is then filtered using a 1μm PE cartridge filter to remove any remaining impurities.
• Inorganic compounds are eliminated through deionization tanks, ensuring high purity. The resistivity of the water is checked during this stage.
•The water undergoes sterilization using UV light to eliminate any microorganisms.
• Finally, the water is filtered through a 0.2μm cartridge filter, and the resulting HPLC grade water is packaged in glass bottles.
Note: This information provides an overview of the typical water purification process and may vary depending on specific applications or systems.Helpful?
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Do you know the concentration of TOC in this water?
1 answer-
The concentration of TOC in this product is not determined. Product 78533, Water for TOC Analysis, may be of interest.
Please see the link below to review this product option:
https://www.sigmaaldrich.com/product/sial/78533Helpful?
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Is this product (HPLC grade water #270733) DNase-, RNase- and protease-free?
1 answer-
The item is not tested for the presence of DNA, RNA, and protease.
Please see the links below to review product options that include this testing:
W4502
https://www.sigmaaldrich.com/US/en/product/sigma/w4502
95284
https://www.sigmaaldrich.com/US/en/product/sigma/95284Note that the above options are NOT tested for suitability in HPLC.
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