The extinguishing effect of the rare and inert gas argon (Ar) is mainly due to the reduction of the oxygen content of the air so that the combustion process cannot continue. The gas passes through the flood area quickly, providing complete room protection. It is much heavier than air and is therefore an ideal chemical for raised floors. Argon is not toxic.
Argon is an inert gas derived from the ambient air. It is 0.93% vol. in the atmosphere. Its density in relation to air is 1.38:1. The extinguishing agent argon is stored compressed in high pressure steel cylinders.