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660167
Natrium-Kieselgel Stufe I
extent of labeling: ~35 wt. % Na-K loading
Synonym(e):
Na-SG-I
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About This Item
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Empfohlene Produkte
Form
solid
Selbstzündungstemp.
248-257 °F
Eignung der Reaktion
reagent type: reductant
Kennzeichnungsgrad
~35 wt. % Na-K loading
Anwendung
Alternative to other reagents for desulfurizations, dehalogenations(as Wurtz coupling reactions), and Birch reductions.[1]
Signalwort
Danger
H-Sätze
Gefahreneinstufungen
Eye Dam. 1 - Skin Corr. 1B - Water-react 2
Zusätzliche Gefahrenhinweise
Lagerklassenschlüssel
4.3 - Hazardous materials which set free flammable gases upon contact with water
WGK
WGK 1
Flammpunkt (°F)
Not applicable
Flammpunkt (°C)
Not applicable
Persönliche Schutzausrüstung
Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
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P. Nandi, et al.,
Tetrahedron Letters, 50, 3864-3866 (2009)
Dye, J. L. et al
Journal of the American Chemical Society, 127, 9339-9339 (2005)
P. F. Vogt and B. Bodnar,
Spec. Chem., 29, 22-24 (2009)
Artikel
SiGNa Chemistry has recently developed a technology for encapsulating alkali metals into nano-structured porous oxides to create stable, free flowing powders with varying reactivities (based on the intended application).
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What is the Department of Transportation shipping information for this product?
1 Antwort-
Hilfreich?
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What is the difference between the NaK Silica gels (Na2K) , for example Stage I or Stage II?
1 Antwort-
These alkali silica gels, which are offered by Sigma-Aldrich for SiGNa Chemistry, can reduce some of the handling precautions traditionally associated with alkali metals, while still retaining the reducing power of the parent alkali.They are classified into three categories. Stage 0 powders, like 660140 or 660159, are air-sensitive, but can easily be used in continuous-flow applications. Stage I powders, like 660167, are non-pyrophoric and dry air-stable; they can be stored for months without any change in reducing capacity. Stage II powders are easily handled in an open ambient environment, but readily react with water to produce stoichiometric yields of pure hydrogen gas. Stage II powders function well as a hydrogen source or drying agent.
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