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295396

Sigma-Aldrich

Hydrogen

≥99.99%

Empirical Formula (Hill Notation):
H2
CAS Number:
Molecular Weight:
2.02
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

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

56 L in steel cylinder

Other Notes

For 295396-50L-EU packaging: 50 L of steel cylinder equipped with brass valve.

Recommended products

  • For 295396-56L: Z146706 CGA 180 Regulator OR Z146943 CGA 110 Valve, with Z147095 CGA 110 to CGA 180 Adapter and Z146986 washer for adapter. Also recommended Z562599 CGA 180 Lecture Bottle Station.
  • For 295396-50L-EU: outlet fitting: DIN 477-1 no.1, Z742162 or Z742164 are the recommended regulators.

Pictograms

FlameGas cylinder

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

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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