![]() ![]() Helium can be safely released in air, though this is a waste of good helium. Liquid helium can only be kept for a few months. Helium cylinders must be stored away from any heat source and inspected periodically. Liquid helium may cause frostbites on contact with bare skin. Helium gas in non-toxic, but if inhaled in large quantities it may replace the oxygen from lungs, leading to asphyxiation. It exists as a colorless, odorless, tasteless, and non-toxic gas.
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