This product does not contain potassium, which makes it less reactive and safer to use as a hydrogen source for fuel cells.
665401
Sodium silica gel Stage II
Synonym(s):
Na-SG-II
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About This Item
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form
solid
autoignition temp.
252 °F
composition
Na, ~35%
greener alternative product characteristics
Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.
sustainability
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density
0.7 g/mL at 25 °C
greener alternative category
, Enabling
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General description
We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here.
Application
Features and Benefits
Hydrogen source for fuel cells. This air-stable, non-pyrophoric powder reduces virtually any water source for hydrogen production. Hydrogen density (mass hydrogen produced/mass solid source) = 2.5 - 3.0 wt. %
signalword
Danger
hcodes
Hazard Classifications
Skin Corr. 1B - Water-react 2
Storage Class
4.3 - Hazardous materials which set free flammable gases upon contact with water
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
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Articles
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 distinguishes this product as 'fuel cell grade?'
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What is the difference between the NaK Silica gels (Na2K) , for example Stage I or Stage II?
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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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What is the Department of Transportation shipping information for this product?
1 answer-
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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