The Central Government has asked the states to maintain the supply of medical oxygen smooth and hassle-free to fight COVID-19. What is the percentage of pure oxygen in medical oxygen?

The Central Government has asked the states to maintain the supply of medical oxygen smooth and hassle-free. Medical Oxygen included in national list of essential medicines and also in the WHO list of essential medicines. Medical Oxygen is pure oxygen. It contains 99.5% of pure oxygen. Generally, the air we breathe contains 21% of oxygen.