665401
Sodium silica gel Stage II
fuel cell grade
Synonym(s):
Na-SG-II
About This Item
Recommended Products
grade
fuel cell grade
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
Greener Alternative Product
density
0.7 g/mL at 25 °C
greener alternative category
, Enabling
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General description
Application
Features and Benefits
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Skin Corr. 1B - Water-react 2
Storage Class Code
4.3 - Hazardous materials which set free flammable gases upon contact with water
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
Regulatory Information
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Certificates of Analysis (COA)
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If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
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What is the Department of Transportation shipping information for this product?
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.
What is the difference between the NaK Silica gels (Na2K) , for example Stage I or Stage II?
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.
What distinguishes this product as 'fuel cell grade?'
This product does not contain potassium, which makes it less reactive and safer to use as a hydrogen source for fuel cells.
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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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