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3.8 Hazardous Substance Oxygen
The handling of oxygen requires special safety measures which are described in the
following section.
Oxygen
has a share of ≈ 21 Vol % in the air,
•
contains two oxygen atoms,
•
is a colorless gas,
•
is odorless,
•
is heavier than air.
•
Oxygen is non-combustible. However, it enables and promotes combustion processes.
Oxygen can cause spontaneous ignition of oil and grease. This also applies to clothing soiled
by oil and grease.
An increased oxygen concentration causes a considerable increase in combustion speed.
Furthermore, technical safety characteristics such as rate of pressure rise, ignition and glow
temperatures, explosion pressures and flame temperatures also change.
Oxygen bonds with almost all elements. The heavy reaction of most substances with oxygen
lead to an increased fire hazard.
Chemical and Physical Features of Oxygen
Chemical symbol
Density
Molar mass
Boiling point
Melting point
Manual_SMOevoPLUS_eng_01.2019.doc
Manual Ozone Generating System SMOevo
O
2
3 (
1.429 kg/m
0°C, 1013 mbar)
≈ 32 g/mol
(under standard conditions)
-183 °C
> -219 °C
PLUS
Safety
page 28 of 179
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