Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements. After hydrogen, helium is the second lightest and second most abundant element in the observable universe, being present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined. Helium is named for the Greek god of the Sun, Helios. We have purity in range from 99.999% to 99.9999% Max. Impurities are as follows: ASGT Helium 99.999% are as Moisture < 2.0 PPM, Oxygen < 2.0 PPM ASGT Helium 99.9995% are as Moisture < 1.0 PPM, Oxygen < 1.0 PPM ASGT Helium 99.9999% are as Moisture < 0.5 PPM, Oxygen < 0.5 PPM