Oxygen (O₂) is a molecule that constitutes approximately 21% of Earth’s air. Oxygen’s boiling point -183°C and its melting point is −218.8°C, at normal atmospheric pressure. Oxygen is a colorless, odorless, and tasteless gas essential to living organisms. It is valued for its strong oxidizing and life-sustaining properties. Oxygen and practically any other element react to create compounds. In many cases, the reaction of Oxygen with other elements generates heat and light, called combustion. Oxygen’s most important and well-known compound is Water.
Oxygen is produced industrially by the fractional distillation of liquid air in a cryogenic air separation unit, a process that separates liquid Oxygen directly from the air. Using the same method, Nitrogen and Argon are also produced. Oxygen can also be produced by using the principle of Water electrolysis, along with Hydrogen. Oxygen and Hydrogen, the two components of Water (H2O), are separated by passing a high electrical current through an electrolyte. Each gas purified in its separate circuit is then pumped into the cylinders.