krypton (Kr), chemical element, a rare gas of Group 18 (noble gases) of the periodic table, which forms relatively few chemical compounds. About three times heavier than air, krypton is colourless, odourless, tasteless, and monatomic.
Kr | ≥99.999% | ≥99.999% | ||||||||
H2O | ≤3.0 ppm | 0.9 ppm | ||||||||
O2 | ≤2.0 ppm | 0.04 ppm | ||||||||
Ar | ≤1.0 ppm | ≤0.03 ppm | ||||||||
H2 | ≤1.0 ppm | ≤0.03 ppm | ||||||||
N2 | ≤3.0 ppm | ≤0.03 ppm | ||||||||
Xe | ≤2.0 ppm | ≤0.03 ppm | ||||||||
CO2 | ≤0.5 ppm | ≤0.03 ppm | ||||||||
THC as CH4 | ≤2.0 ppm | ≤0.01ppm |