Liquid and gaseous oxygen O2

Oxygen gas, liquid oxygen

Liquid oxygen is one of the physical forms of oxygen gas that is found in soft and pale blue color and has various applications in industries including medicine, laboratory and industry. Also, this substance is used in the aerospace industry as an oxidizing agent for spacecraft engines. The temperature of oxygen condensate reaches minus 182 degrees Celsius.

The oxygen product produced in the Parsia Gas complex can be ordered with real-time quality control with the specifications in the table above. If other percentages of purity are needed, it will be possible to provide it in the shortest possible time.


Oxygen is one of the second main elements in the atmosphere, which makes up about 20.8% of the atmosphere. Liquid oxygen is also found in pale blue color and is very cold. Oxygen is not flammable, but it is a very strong oxidizer. As you know, oxygen is one of the vital elements for living organisms on earth.
In terms of reactivity, it can be said that oxygen reacts with all organic substances and different metals and then creates an oxide substance. If you expose substances that burn in air to high purity oxygen, these substances will burn more intensely. The equipment that is placed in the service and handling of oxygen must be cleaned precisely and the systems must be made of materials that have a high ignition temperature and do not react if they come into contact with oxygen during service.

Oxygen is a strong oxidant that easily forms oxides with most elements as well as with other compounds. Elements that make up oxides make up almost half of the earth’s crust. The presence of oxygen enables combustion.
Oxygen, odorless and tasteless, with high purity (99.5%) is used as an oxide compound to support cutting operations. Oxygen may be added in controlled amounts to GMAW shielding gases and is also used as a plasma cutting gas (with hafnium electrodes) on steel.
Oxygen is constantly renewed in the Earth’s atmosphere by photosynthesis, which uses the energy of sunlight to produce oxygen from water and carbon dioxide. Oxygen must be constantly compensated by the photosynthetic activity of living organisms to remain a free element in the air. Another (allotrope) form of oxygen, ozone (O3), strongly absorbs UV radiation, and the high-altitude ozone layer helps protect the biosphere from UV radiation. However, surface-level ozone is a byproduct of smog and thus a pollutant.
Common applications of oxygen include the production of steel, plastics and textiles, turning, welding and cutting of steel and other metals, rocket fuel, oxygen therapy and breathing systems in aircraft, submarines, spacecraft and diving.

Oxygen gas is one of the vital and essential elements of the earth, but if you are wondering how this gas is produced, we must say that the earth’s atmosphere was not always full of oxygen gas. In the past, the earth’s atmosphere consisted of carbon dioxide and other gases. The atmosphere of the earth was very similar to the planets Mars and Venus.
Most people believe that the growth and emergence of plants and trees caused more oxygen gas to be made during the process of photosynthesis, but there is also a theory that the creation of oxygen from carbon dioxide gas happened by ultraviolet light. Also, the phytoplanktons that live in the seas and carry out the process of photosynthesis produce a lot of oxygen.
Oxygen gas is a colorless and odorless gas, and its solid and liquid forms are pale blue in color, and in the mentioned states, this substance has strong paramagnetic properties. Liquid oxygen is often made by fractional distillation of liquid air.

Oxygen gas safety information

Oxygen at high pressures can become a toxic substance.

High and long-term exposure to the pure form of this gas can be harmful and very dangerous for the human pulmonary and nervous system.

The effect of this gas on the nervous system is great and it causes problems such as loss of vision, seizures and coma in a person.

Disturbances in the pulmonary system such as the problem of lung edema, reduction of lung capacity and loss of lung tissues occur in long-term exposure to this gas.

Also, there are special derivatives of oxygen whose toxicity level is very high, which can be mentioned as ozone or O3, hydrogen peroxide and superoxide radicals and hydroxyls. The human body has developed ways to defend and deal with these types of substances, but they should not be neglected.

Dangers of oxygen gas

Also, in addition to the issues of storing this gas, the discharge of oxygen gas cylinders is also very important, and the discharge of these gases should be prevented along with other inflammable gases such as methane gas, hydrogen gas, and other hydrocarbons.

Oxygen gas cylinders are not dangerous by themselves, but if placed next to another cylinder that has fire-causing properties, it becomes very dangerous. These cylinders, which should not be placed next to oxygen gas, can be hydrogen gas, methane gas, and other hydrocarbons. Ha pointed out, if there is a leak in any of the mentioned cases, it will cause big explosions, that's why storing cylinders is very important and this work must be done correctly and with high precision.

It should be noted that people who work with these cylinders must be careful while working and never under any circumstances touch these cylinders with oiled hands or gloves.

Liquid oxygen is one of the three physical forms of oxygen gas, which is available in pale blue color and is used in various industries. We should also say that liquid oxygen is one of the cryogenic gases, and cryogenic gases are gases that are in liquid form and their boiling temperature is minus 90 degrees Celsius under normal conditions.
Due to its high difference between the surrounding environment, this liquid should be isolated from the surrounding environment even in winter, and this issue is very important.

Liquid oxygen has many applications, for example, this substance is used as an oxidizing fuel in spacecraft, shuttles, space shuttles, rockets, Apollos, spaceships, etc., in this way, this substance is combined with liquid hydrogen and Kerosene plays the role of stimulant and booster. Liquid oxygen is also known as an industrial gas in the industry, which has many uses, and it is also widely used in medical fields and hospitals.

Other uses of oxygen

Oxygen is used for many oxidation reactions in the chemical industry. Using pure oxygen has advantages such as higher reaction rate, easier product separation, higher yield and smaller required equipment.

Higher purity oxygen is used to form silicon dioxide and metal oxide.

Oxygen with hydrogen is used as fuel for welding torches, soldering, glass blowing and pipe sealing in various electrical components such as tongue relay switches.

High-purity oxygen is used along with high-purity methane in gas-cooled advanced nuclear reactors (A6R) to maintain the proper balance of carbon in the cooling Co2 gas in the core.

The use of oxygen in wastewater treatment plants accelerates the decomposition of wastewater.

Oxygen with a high percentage of purity is used in the production process of optical fiber.

Oxygen is used for chemical synthesis.

Oxygen is used as an oxidizer.

Oxygen is used in various industries, including steel, non-metallic, glass and concrete industries, as a substitute for air in burners or furnaces to achieve the desired increased temperature.

Oxygen is used in the food industry to transport live fish and seafood.

Oxygen is used to enrich the air in the fermentation process.

Oxygen is used in combination with other gases in breathing equipment, such as the equipment necessary for resuscitation (O2 + CO2) and underwater diving (O2 + N2) or (O2 + She).

Oxygen is used in some cases for food packaging (MAP). In this application, oxygen can be used both pure and mixed with carbon dioxide or nitrogen.

Both pure and mixed oxygen is used in various medical fields.

Oxygen is also used in gas calibration.

Oxygen is used in cutting and welding.