Helium (He) is a colorless, odorless, non-toxic, non-corrosive and non-flammable gas, which is mainly derived from natural gas wells and is extremely rare. Liquid helium (-269 °C) is the coldest liquid on earth.
Packaged gases
Electronics, optical fiber, aerospace, balloon inflation, medical, semiconductors
Metal welding and coating, magnetic levitation trains, deep sea diving mixture, helium leak detection, laser gas, atomic reactor coolant, heat treatment quenching