Oxygen Ultra Pure 5.2 (99.9992%) (N2 5 ppm, H2 0.5 ppm, H2O 0.5ppm, THC 0.5 ppm, CO+CO2 1ppm) is ideal for a wide range of applications and processes where product purity is critical including chemical synthesis, combustion, and laboratory use. Supplied in a 10 litre steel cylinder at 200 bar.