Oxygen UltraPure 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 50 litre steel cylinder at 200 bar.