The resistivity of this product has not been determined.
270733
Agua
Water
1 of 1 reviewers received a sample product or took part in a promotion
suitable for HPLC
Sinónimos:
Aqua, Óxido de dihidrógeno
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About This Item
Fórmula lineal:
H2O
Número de CAS:
Peso molecular:
18.02
Beilstein:
2050024
Número CE:
Número MDL:
Código UNSPSC:
12190000
ID de la sustancia en PubChem:
NACRES:
NA.21
técnicas:
HPLC: suitable
bp:
100 °C (lit.)
presión de vapor:
3 mmHg
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Productos recomendados
densidad de vapor
<1 (vs air)
Nivel de calidad
presión de vapor
3 mmHg
Formulario
liquid
técnicas
HPLC: suitable
residuo de evap.
<0.0003%
índice de refracción
n20/D 1.34 (lit.)
pH
6.0-8.0 (25 °C)
bp
100 °C (lit.)
mp
0 °C (lit.)
densidad
1.000 g/mL at 3.98 °C (lit.)
λ
H2O reference
Absorción UV
λ: 205 nm Amax: 0.01
λ: 210 nm Amax: 0.01
λ: 250-400 nm Amax: 0.005
cadena SMILES
O
InChI
1S/H2O/h1H2
Clave InChI
XLYOFNOQVPJJNP-UHFFFAOYSA-N
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Descripción general
El agua adecuada para HPLC suele utilizarse como disolvente para la elución isocrática en la cromatografía de cationes y de aniones. Además, se utiliza como un componente para preparar disoluciones patrón de reserva, y para la evaporación bajo una corriente de nitrógeno en un baño de agua para concentrar la muestra antes del análisis mediante LC-MS-MS.[1] [2]
Aplicación
Nota de preparación
Producto filtrado a través de un filtro de 0,2 μm
Otras notas
Aviso importante
El artículo de referencia 270733-6X1L será descatalogado. Pida la botella 270733-1L que es físicamente idéntica con las mismas especificaciones exactas.
El artículo de referencia 270733-6X1L será descatalogado. Pida la botella 270733-1L que es físicamente idéntica con las mismas especificaciones exactas.
Código de clase de almacenamiento
12 - Non Combustible Liquids
Clase de riesgo para el agua (WGK)
nwg
Punto de inflamabilidad (°F)
Not applicable
Punto de inflamabilidad (°C)
Not applicable
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Do you know the resistivity value @ 25°C?
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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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