The resistivity of this product has not been determined.
270733
Eau
Water
1 of 1 reviewers received a sample product or took part in a promotion
suitable for HPLC
Synonyme(s) :
Aqua, Oxyde de dihydrogène
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About This Item
Formule linéaire :
H2O
Numéro CAS:
Poids moléculaire :
18.02
Beilstein:
2050024
Numéro CE :
Numéro MDL:
Code UNSPSC :
12190000
ID de substance PubChem :
Nomenclature NACRES :
NA.21
Technique(s):
HPLC: suitable
pb:
100 °C (lit.)
Pression de vapeur:
3 mmHg
Le tarif et la disponibilité ne sont pas disponibles actuellement.
Produits recommandés
Densité de vapeur
<1 (vs air)
Niveau de qualité
Pression de vapeur
3 mmHg
Forme
liquid
Technique(s)
HPLC: suitable
Résidus d'évap.
<0.0003%
Indice de réfraction
n20/D 1.34 (lit.)
pH
6.0-8.0 (25 °C)
pb
100 °C (lit.)
Pf
0 °C (lit.)
Densité
1.000 g/mL at 3.98 °C (lit.)
λ
H2O reference
Absorption UV
λ: 205 nm Amax: 0.01
λ: 210 nm Amax: 0.01
λ: 250-400 nm Amax: 0.005
Chaîne SMILES
O
InChI
1S/H2O/h1H2
Clé InChI
XLYOFNOQVPJJNP-UHFFFAOYSA-N
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Catégories apparentées
Description générale
L'eau pour HPLC est couramment utilisée comme solvant dans l'élution isocratique en chromatographie d'échange de cations et d'anions. Elle est aussi employée comme constituant dans la préparation de solutions-mères d'étalonnage, et pour l'évaporation sous flux d'azote au bain-marie pour concentrer les échantillons avant une analyse LC-MS-MS.[1] [2]
Application
Notes préparatoires
Produit filtré sur un filtre de 0,2 μm
Autres remarques
Avis important
L′article réf. 270733-6X1L va être supprimé. Veuillez commander le conditionnement en une bouteille (réf. 270733-1L), qui est physiquement identique et est soumis exactement aux mêmes spécifications.
L′article réf. 270733-6X1L va être supprimé. Veuillez commander le conditionnement en une bouteille (réf. 270733-1L), qui est physiquement identique et est soumis exactement aux mêmes spécifications.
Code de la classe de stockage
12 - Non Combustible Liquids
Classe de danger pour l'eau (WGK)
nwg
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
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Do you know the resistivity value @ 25°C?
1 answer-
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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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