Oxygen
CAS 7782-44-7O231.999 g/mol
Dioxygen is a gas molecular entity, an elemental molecule and a diatomic oxygen. It has a role as a micronutrient, a nutrient, a reagent, an anti-inflammatory drug, an oxidising agent, a Saccharomyces cerevisiae metabolite, a human metabolite and a member of food packaging gas. It is a conjugate base of a hydridodioxygen(1+).
IUPAC: molecular oxygen
PubChem
Physical & Chemical Properties
| Melting Point | -361 °F (USCG, 1999) |
| Boiling Point | -297.3 °F at 760 mmHg (USCG, 1999) |
| Density | 1.14 at -297.4 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | 39mg/L |
| Vapor Pressure | 1 kPa at -211.9 °C; 10 kPa at -200.5 °C; 100 kPa at -183.1 °C |
| Appearance | Oxygen is a colorless, odorless and tasteless gas. It will support life. It is noncombustible, but will actively support the burning of combustible materials. Some materials that will not burn in air will burn in oxygen. Materials that burn in air will burn more vigorously in oxygen. As a non-liquid gas it is shipped at pressures of 2000 psig or above. Pure oxygen is nonflammable. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket. Oxygen is used in the production of synthesis gas from coal, for resuscitation and as an inhalant. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2804
Data: UN Comtrade
Suppliers on Chem-Exchange
No suppliers currently listing Oxygen
List Your ProductsSafety Data Sheets
No SDS documents available
Upload an SDS document