According to ADR, compressed oxygen has the UN No. 1072, code 10, hazard number 25. The delivery of oxygen is not considered to be the transport of dangerous goods in the case when the volume of gas does not exceed 1000 liters per vehicle, if this amount is exceeded, the transport of oxygen is carried out according to the rules of the transport of dangerous goods. Transportation of oxygen cylinders is marked with signs 2.2 and 5.1. and is carried out by tented or boarded transport.

It has a boiling point of 182.98 ̊C and a blue color. The UN No.1073, code 30. Transportation of acid in liquid form is carried out by tanks with thermal insulation.

In the metallurgical industry, it is involved in the production of steel and in burners. Transportation of oxygen is necessary for customers who use it for cutting or welding metal.
It is an oxidizer for rocket fuel.
In medicine, it is used as a breathing mixture.
In the chemical industry, O is used as an oxidizer in a variety of syntheses.