295396
Hydrogen
≥99.99%
Synonym(s):
Hydrogen gas
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About This Item
Empirical Formula (Hill Notation):
H2
CAS Number:
Molecular Weight:
2.02
NACRES:
NA.22
PubChem Substance ID:
UNSPSC Code:
12142100
EC Number:
215-605-7
MDL number:
Assay:
≥99.99%
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
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
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Danger
hcodes
Hazard Classifications
Flam. Gas 1A - Press. Gas Compr. Gas
Storage Class
2A - Gases
wgk
nwg
flash_point_f
<-238.0 °F - closed cup
flash_point_c
< -150 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)
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Catalytic reductive transformations of carboxylic and carbonic acid derivatives using molecular hydrogen
Dub, Pavel A and Ikariya, Takao
ACS Catalysis, 2(8), 1718-1741 (2012)
Gold catalysts open a new general chemoselective route to synthesize oximes by hydrogenation of α, β,-unsaturated nitrocompounds with H2
Corma A, et al.
Journal of the American Chemical Society, 129(20), 6358-6359 (2007)
Effects of reduction temperature and metal- support interactions on the catalytic activity of Pt/γ-Al2O3 and Pt/TiO2 for the oxidation of CO in the presence and absence of H2
Alexeev OS, et al.
The Journal of Physical Chemistry B, 109(49), 23430-23443 (2005)