295396
Hydrogen
≥99.99%
Synonym(s):
Hydrogen gas
Sign In to View Organizational & Contract Pricing.
Select a Size
Change View
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 Segment
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
Still not finding the right product?
Explore all of our products under Hydrogen
signalword
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)
Choose from one of the most recent versions:
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.