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Argon is a colorless, odorless, tasteless gas with the chemical symbol Ar. Argon, an inert (non-reacting) gas, is an element found at 0.93% in the atmosphere.

Physical Properties
  • Argon is a colorless and odorless gas at room temperature and under pressure.

  • Its boiling point is -185.848 °C and its freezing point is -189.34 °C.

  • Argon is the third densest gas in the atmosphere, after neon and helium.


  • Argon is obtained by fractional distillation of air. In this method, liquid nitrogen and liquid oxygen are extracted from the air, while argon is separated from the remaining gas mixture.


Areas of Use
  • Welding: Argon is used in TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding processes. In these applications, argon gas is used to prevent the electrode and molten metal from reacting with the atmosphere.

  • Metallurgy and Materials Processing: Argon is used to modify the atmosphere in steelmaking and other metallurgical processes.

  • Electronics Industry: Argon gas is used for atmosphere control during the production of semiconductor devices.

  • Sunflower Lighting: Some sunflower lamps use argon to produce high color temperature light.

  • Cryogenic Applications: Argon can be liquefied at low temperatures and this property enables its use in some cryogenic applications.


General Properties
  • Argon is colorless and tasteless, so it does not react with other substances when used in many applications.

  • Because it is chemically inert, it does not interact with many materials, which allows it to be used in many industrial processes.


  • Argon is generally not dangerous because it is an inert gas. However, it can pose a risk in poorly ventilated areas where there is not enough oxygen.


Argon is an important gas that finds a wide range of uses, from industrial applications to scientific research. These properties make it an ideal option for controlling the atmosphere, especially in industries such as metalworking and welding.

Laboratuvarda Mühendisi
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