Oxygen is a colorless, odorless, and tasteless gas. The relative density of gas (air=1) is 1.105 at 21.1℃ and 101.3kPa, and the density of liquid is 1141kg/m3 at the boiling point. Oxygen is not toxic, but exposure to high concentrations of oxygen can have adverse effects on the lungs and central nervous system. Oxygen can be shipped as a non-liquefied gas at a pressure of 13790kPa or as a cryogenic liquid.
Many oxidation reactions in the chemical industry use pure oxygen rather than air in order to benefit from higher reaction rates, easier product separation, higher yields, or smaller equipment size.
Oxygen is obtained on a commercial scale by the liquefaction and subsequent distillation of air. For very high purity oxygen it is normally necessary to take the product from an air separation plant through a secondary purification and distillation stage. Alternatively high purity oxygen may be produced by the electrolysis of water. Lower purities of oxygen an also be produced with membrane technique.
High purity oxygen is used for the formation of silicon dioxide and metal oxide, as an etchant for photoresist, and in mixtures with halocarbons for etching silicon.
Oxygen is also used in conjunction with hydrogen to fuel torches for welding, brazing, glass blowing and tube sealing for a variety of electronic components such as reed relay switches.
Injecting oxygen into sewage treatment plants accelerates the decomposition of sewage.
Oxygen is used for chemical synthesis. Oxygen is used as an oxidizer.
Oxygen is used to supplement or replace air in burners used in many different industries in order to obtain increased temperatures. Typical applications are found in the steel, non-ferrous, glass and concrete industries amongst many others. Oxygen is used for flame sealing of glass ampuls for finished products for the pharmaceutical industry and the chemical industry.
In the food industry, oxygen is used in the transportation of live fish and seafoods. Oxygen is used in some cases for modified atmosphere packaging (MAP) of food stuffs. It is used either pure or in mixtures with carbon dioxide and/or nitrogen.
Liquid oxygen is used in liquid oxygen explosives, and as a comburent in space propulsion.
Oxygen is used in medical gas mixtures.
Cylinder: 40L Valve: G5/8 CGA580 Content: 5.6M3
Cylinder bundle: 40L*16 Valve: G5/8 CGA580 Content: 5.6M3/Cyl*16
The molar mass of oxygen is generally considered to be 32/mol.
The relative atomic mass of oxygen is 32 (the oxygen molecule has two atoms, and the atomic weight of oxygen is 16).
The density of oxygen is 1.429g/L.
-182.98 at 1.013bar [℃]; -297.34 at 14.5 psi, [℉]
Oxygen is not greenhouse gas.
For normal people, if too much hyperbaric oxygen is inhaled or oxygen is inhaled for too long, oxygen toxicity will occur. Oxygen toxicity occurs mainly by partial pressure of oxygen rather than concentration of oxygen.
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