Dominion Gas, A Praxair Company

Heliox is a breathing gas composed of a mixture of helium (He) and oxygen (O2).

Helium breathing mixtures enable divers to work at greater depths for vital repair and construction work associated with the offshore oil industry. Helium does not react with any of the body's chemical functions and it is virtually impossible for it to dissolve in the blood, even at pressure.

Heliox is generally used at depths over 50 metres because the helium gas allows greater depths of dive and thus avoids the effects of Nitrogen Narcosis.

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