Argon is a colorless, odorless, tasteless and nontoxic gas. Argon belongs to the family of rare gases. The gas is 1.38 times heavier than air and is slightly soluble in water Argon does not burn or support combustion. It is chemically non reactive.

Argon is present in the atmosphere at a concentration of 0.93%. Argon is recovered from air in an Air Separation Unit (ASU) where it is drawn off as a cryogenic liquid at about -186°C. Argon can then be distributed as a cryogenic liquid or as a gas in cylinders.

Argon is an inert gas that causes oxygen depletion leading to asphyxiation and death. Argon is not consumed in any process and might, therefore, be present in high concentration in exhaust streams. Argon used in electric welding operations (TIG welding) can fill the tanks and vessels being constructed and lead to asphyxiation hazards. In its liquid form argon represents a frostbite cold burn hazard.

Welding
Argon is used to provide an inert atmosphere during welding of sensitive metals like aluminum, titanium, stainless steel and their alloys.

Household
It is used to fill electric lamps.

Semiconductors
It is used as a shielding and carrier gas in the manufacture of semiconductors and electronic components.