Liquid Nitrogen is an industrial liquefied gas which is at -196°c, the gas released in colourless, odourless and tasteless.
Users of WBC chambers are not in direct contact with the liquefied gas – body parts should NEVER be immersed or exposed directly to liquid nitrogen – the resulting effect would kill all the exposed tissue.
The vapour cloud associated with liquid nitrogen is caused by the gas warming and condensing in the air resulting in nitrogen being released and displacing oxygen. Prolonged release of gas in an un vented space will result in oxygen deficiency.
The air we breath normally contains 20.9% oxygen by volume.
Reactions to oxygen deficiency differ from person to person – but exposure to an oxygen concentration of less than 6% will almost certainly result in fainting, severe brain damage or death.
Oxygen monitors are installed in WBC chambers to ensure that the concentration of oxygen in the air remains at a safe level.