... of inorganic high-purity gases, such as nitrogen, helium, hydrogen, oxygen, carbon monoxide, etc. Argon gas Nature: colorless ... air=1) Argon is considered a rare atmospheric gas which is colorless, odorless, tasteless and nontoxic ... window insulation, welding, and semiconductor applications. Name MF Purity Impurity content (ppm) Argon Ar 99.999% ... .5 99.999%~99.9999% High Purity Compressed Argon Gas