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
230391
Magnesiumsulfat Heptahydrat
ACS reagent, ≥98%
Synonym(e):
Epsom-Salz
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98.0-102.0% (ACS specification)
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Qualität
ACS reagent
Qualitätsniveau
Dampfdichte
<0.01 (vs air)
Dampfdruck
<0.1 mmHg ( 20 °C)
Assay
≥98%
98.0-102.0% (ACS specification)
Form
crystals
Verunreinigungen
≤0.005% insolubles
pH-Wert
5.0-8.2 (25 °C, 5%)
Anionenspuren
chloride (Cl-): ≤5 ppm
nitrate (NO3-): ≤0.002%
Kationenspuren
Ca: ≤0.02%
Fe: ≤5 ppm
K: ≤0.005%
Mn: ≤5 ppm
NH4+: ≤0.002%
Na: ≤0.005%
Sr: ≤0.005%
heavy metals: ≤5 ppm (by ICP-OES)
SMILES String
O.O.O.O.O.O.O.[Mg++].[O-]S([O-])(=O)=O
InChI
1S/Mg.H2O4S.7H2O/c;1-5(2,3)4;;;;;;;/h;(H2,1,2,3,4);7*1H2/q+2;;;;;;;;/p-2
InChIKey
WRUGWIBCXHJTDG-UHFFFAOYSA-L
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Dieser Artikel | M1880 | 13142 | M2773 |
|---|---|---|---|
| form crystals | form powder or crystals | form powder or crystals | form - |
| assay ≥98%, 98.0-102.0% (ACS specification) | assay ≥99.0% | assay 99.5-100.5% (calc. to the dried substance) | assay ≥99.0% |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 200 |
| grade ACS reagent | grade - | grade - | grade for molecular biology |
| impurities ≤0.005% insolubles | impurities - | impurities acidity or alkalinity, in accordance, organic volatile impurities, complies (GC), residual solvents, complies, ≤0.001 ppm heavy metals (as Pb), ≤0.004% free alkali (as MgO), ≤0.01% free acid (as H2SO4) | impurities - |
| vapor pressure <0.1 mmHg ( 20 °C) | vapor pressure <0.1 mmHg ( 20 °C) | vapor pressure <0.1 mmHg ( 20 °C) | vapor pressure <0.1 mmHg ( 20 °C) |
Allgemeine Beschreibung
Anwendung
- Phenazin und Chinoxalinderivate über eine Kondensationsreaktion zwischen o-Phenylendiaminen und 1,2-Dicarbonylverbindungen.
- Imidazolderivate durch eine Eintopf-Mehrkomponenten-Kondensationsreaktion von aromatischen Aldehyden, Benzil sowie aliphatischen und aromatischen primären Aminen.
NaBH4 auf MgSO4 7H2O kann als effizienter Katalysator für die Reduktion von α, β-ungesättigten Carbonylverbindungen zu den entsprechenden Alkoholen verwendet werden.
Lagerklassenschlüssel
13 - Non Combustible Solids
WGK
WGK 1
Flammpunkt (°F)
Not applicable
Flammpunkt (°C)
Not applicable
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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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