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About This Item
Empirical Formula (Hill Notation):
H2
CAS Number:
Molecular Weight:
2.02
EC Number:
MDL number:
UNSPSC Code:
12142100
PubChem Substance ID:
NACRES:
NA.22
Recommended Products
vapor density
0.07 (21 °C, vs air)
Quality Level
Assay
≥99.99%
autoignition temp.
1060 °F
expl. lim.
74.2 %
impurities
≤10 ppm oxygen
≤5 ppm water
bp
−252.8 °C (lit.)
mp
−259.2 °C (lit.)
SMILES string
[H]
InChI
1S/H2/h1H
InChI key
UFHFLCQGNIYNRP-UHFFFAOYSA-N
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General description
Hydrogen(H2) is colorless, odorless, tasteless, non-toxic, and highly flammable diatomic gas.
Application
H2 can be used:
- To reduce metal oxide to metal.
- In the catalytic hydrogenation of nitro compounds, ketones, and olefinic compounds.
Packaging
Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed.
Compatible with the following:
Compatible with the following:
- Aldrich® lecture-bottle station systems
- Aldrich® lecture-bottle gas regulators
Other Notes
See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation
Legal Information
Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
also commonly purchased with this product
Product No.
Description
Pricing
control valve
hose barb
Product No.
Description
Pricing
purge valve
Product No.
Description
Pricing
recommended
Product No.
Description
Pricing
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Flam. Gas 1A - Press. Gas Compr. Gas
Storage Class Code
2A - Gases
WGK
nwg
Flash Point(F)
<-238.0 °F - closed cup
Flash Point(C)
< -150 °C - closed cup
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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Although the local environment of a molecule can play an important role in its chemistry, rarely has it been examined experimentally at the level of individual molecules. Here we report the precise control of intramolecular hydrogen-transfer (tautomerization) reactions in single
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