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Argon (Ar) is a noble gas which is the third-most abundant in the earths’s atmosphere at 0.934%. Its name is derived from a greek word meaning «inactive». Indeed, Argon is a chemically inert gas. It has a low thermal conductivity but has electronic properties (ionization and/ or the emission spectrum) desirable for some applications.


Air is a mixture of gases, consisting primarily of nitrogen (78 %), oxygen (21 %) and the inert gas argon (>0.9 %). The remaining 0.1 % is made up mostly of carbon dioxide and the inert gases neon, helium, krypton and xenon.

Argon is produced, most commonly, in conjunction with the manufacture of high purity oxygen using cryogenic distillation of air in special units. So-called air separation plants employ a thermal process known as cryogenic rectification to separate the individual components from one another in order to produce high-purity nitrogen, oxygen and argon in liquid and gaseous form. Since the boiling point of argon is very close to that of oxygen, separating pure argon from oxygen requires then many stages of distillation.

Storage and Transport:

In liquid form, oxygen, nitrogen and argon are stored in tanks and transported to customers by tanker lorries and cryogenic iso-containers.

Messer has its own fleet of tank lorries, iso-containers and storage tanks ready to be used to supply your needs

Health and Safety:

Argon is colourless, tasteless, odourless and inert. Al­though nontoxic, argon can act as a simple asphyxiate by displacing air or liquefying oxygen. In addition, exposure to liquid argon may cause severe frostbite to the skin and eyes. To avoid these harmful effects, producers and cus­tomers should follow strict safety guidelines for storage and handling.