Specialty Gases

High purity oxygen O2

English name: Oxygen

Chemical formula: O2

CAS number: 7782-44-7

Appearance: colorless gas

Molar mass: 32g/mol

Melting point: -218.8

Density: 1.14

Solubility (water): 1.14 (-183℃)

Boiling point: -181.3

Warning term: Danger

GHS hazard classification: Oxidizing gas Classification 1

Main hazard: Avoid inhalation of high concentrations

Purity	Impurities	Packaging	Valve	Implementation standards	Use
≥99.999%	H₂≤0.5，Ar≤2，N₂≤5，Total hydrocarbon content ≤0.5，CO₂≤0.5，H₂O≤2	Bottled, containerized	QF-90A	GB/T14599-2008	High-purity oxygen is used for chemical vapor deposition of silicon dioxide; As an oxidation source and a reactant for producing high-purity water; Method oxidation; Mixed with carbon tetrafluoride for plasma etching. The main use of oxygen comes from its ability to sustain life and its combustion-supporting properties; It is widely used in the metallurgical industry. It can also be used for water treatment. All oxidation reactions and combustion processes require oxygen, such as the removal of impurities such as sulfur and phosphorus during steelmaking. The temperature of oxygen and acetylene mixture when burning is as high as 3500℃, which is used for welding and cutting of steel. Oxygen is required for glass manufacturing, cement production, mineral roasting, and hydrocarbon processing.
≥99.9999%	H₂≤0.1，Ar≤0.2，N₂≤0.1，Total hydrocarbon content ≤0.1，CO₂≤0.1，H₂O≤0.5	Bottled, containerized	CGA-540	GB/T14604-2009