Liquid oxygen (LOX) is a cryogenic liquid form of oxygen that has been cooled and compressed to a temperature of approximately -183°C (-297°F) at atmospheric pressure. LOX is produced by air separation, which involves cooling and compressing air to separate its components based on their boiling points. Oxygen gas, which has a boiling point of -183°C, is separated from other gases such as nitrogen, argon, and carbon dioxide, which have higher boiling points. The resulting oxygen gas is then liquefied by further cooling and compression to produce liquid oxygen.
Liquid oxygen are transported and stored in cryogenic containers, such as T75 ISOTanks, that are designed to maintain the low temperature of LOX.