Krypton gas purity 99,999%
Atomic number 36
Molecular weight 83,8 g/mol
Group number 18
Group name Rare gases
CAS registry ID 7439-90-9
UN number UN 1056
History & Occurrence
Xenon (from the Greek word ξένος, meaning “strange”) was discovered in England by William Ramsay and Morris Travers. They found it in the residue left over from evaporating components of liquid air.
Krypton (chemical symbol Kr, atomic number 36) is a colorless, odorless, tasteless noble gas. It occurs in trace amounts in the atmosphere and is isolated by fractionating liquefied air. Krypton is inert for most practical purposes, but it is known to form compounds with fluorine. Krypton can also form “clathrates” (cage-like molecules) with water, when atoms of the element are trapped in a lattice of water molecules.
Krypton is used in the fanciest, most energy-efficient double-pane insulated windows.
Krypton is also used in certain fluorescent lamps and in a flash lamp employed in high-speed photography. Radioactive krypton-85 is useful for detecting leaks in sealed containers, with the escaping atoms detected by means of their radiation.