Hydrogen
Hydrogen is obtained by electrolysis of water or from water gas, coke oven gas, or hydrocarbons.
Hydrogen is usually considered a non-metal. It is stored under pressure in steel cylinders.
It is used for hydrogenation of oils (production of solid fats), cracking of petroleum products, in ammonia synthesis, for cutting or welding metals (oxygen-hydrogen soldering lamps) and others.
Source: "Explanations to the Harmonized System of Foreign Economic Activity of the Russian Federation (HS FEA Russia)" (prepared by the Federal Customs Service of Russia) (volume 1, sections I - VI, groups 1 - 29)