by Hydrogen
Hydrogen
is a flammable, colorless, odorless, compressed gas packaged in
cylinders at high pressure. It poses an immediate fire and explosive
hazard when concentrations exceed 4%. It is much lighter than air and
burns with an invisible flame. High concentrations that will cause
suffocation are within the flammable range and must not be entered.
PHYSICAL AND CHEMICAL PROPERTIES
Molecular weight 2
Melting point -259 °C
Boiling point -253 °C
Critical temperature -240 °C
Relative density, gas 0.07 (air=1)
Relative density, liquid Not applicable.
Vapour Pressure 20°C Not applicable.
Solubility mg/l water 1.6 mg/l
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Appearance/Colour Colourless gas
Odour None
Autoignition temperature 560 °C
Flammability range 4-75 vol% in air.
Other data Burns with a colourless invisible flame.
STABILITY AND REACTIVITY
Stability and reactivity Can form explosive mixture with air.
May react violently with oxidants.
TOXICOLOGICAL INFORMATION
General No known toxicological effects from this product.
ECOLOGICAL INFORMATION
General No known ecological damage caused by this product.
DISPOSAL CONSIDERATIONS
General
Do not discharge into areas where there is a risk of forming an
explosive mixture with air. Waste gas should be flared through a
suitable burner with flash back arrestor. Do not discharge into any
place where its accumulation could be dangerous. Contact supplier if
guidance is required.
