Hydrogen is the lightest gas known. It is a colorless, odorless and tasteless gas and is flammable and nontoxic at atmospheric temperatures and pressures. The Compressed Gas Association (CGA) specification G-5.3 is the industry standard. Type II, Grade A is considered commercial liquid hydrogen and Type I, Grade B is considered commercial gaseous hydrogen.
Hydrogen is the lightest gas known. It is a colorless, odorless and tasteless gas and is flammable and nontoxic at atmospheric temperatures and pressures. The Compressed Gas Association (CGA) specification G-5.3 is the industry standard. Type II, Grade A is considered commercial liquid hydrogen and Type I, Grade B is considered commercial gaseous hydrogen.