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Time of Issue: Apr. 12, 2013 9:24:46
Period OF Validity: Apr. 12, 2014 9:24:46
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Application: Hydrogen is a chemical element with symbol H and atomic number 1. With an atomic weight of 1.00794 u (1.007825 u for hydrogen-1), hydrogen is the lightest element and its monatomic form (H1) is the most abundant chemical substance, constituting roughly 75% of the Universe's baryonic mass. Non-remnant stars are mainly composed of hydrogen in its plasma state.Large quantities of H2 are needed in the petroleum and chemical industries.Hydrogen is employed to saturate broken ("dangling") bonds of amorphous silicon and amorphous carbon that helps stabilizing material properties. Hydrogen is commonly used in power stations as a coolant in generators due to a number of favorable properties that are a direct result of its light diatomic molecules.In more recent applications, hydrogen is used pure or mixed with nitrogen (sometimes called forming gas) as a tracer gas for minute leak detection.

Product Specification

Name

Hydrogen

CAS No.

1333-74-0

MF

H2

EINECS No.

215-605-7

Grade

Purity

 Impurity content (ppm)

99.99%

O2≤5, N2≤60, CO≤5, CO2≤5, CH4≤10, H2O≤30

99.999%

O2≤1, N2≤5, CO≤1, CO2≤1, CH4≤1, H2O≤3

99.9999%

H2O≤1, O2≤0.2, N2≤0.4, CO2≤0.1, CO≤0.1, CH4≤0.2

Physical Date

Molecular Weight

2.02 g/mole

Boiling Point

-423oF (-252.8oC)

Specific Volume

200 ft3/lbs at 70oF

Vapor Pressure   @70oF (21.1oC) = Above the critical temp. of -399.8oF (-239.9oC)

Liquid Density at Boiling Point

4.43 lb/ft3 (70.96kg/m3)

Gas Density at 70oF. 1 atm

0.0052 lb/ft3

Solubility In Water

Very slightly

Freezing Point

-434.6oF (-259.2oC)

Evaporation Rate

N/A (Gas)

Specific Gravity (Air=1)

@70oF (21.1oC) = 0.069

Appearance And Odor    Colorless, odorless gas.



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