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Chemical Datasheet

CARBON DIOXIDE AND OXYGEN MIXTURE

 2.2 - Non-flammable, non-poisonous gas 5.1 - Oxidizer

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 124-38-9   (CARBON DIOXIDE)
  • 7782-44-7
  • 1014 (obsolete)
  • Non-Flammable Gas
  • Oxidizer
 none
NIOSH Pocket Guide International Chem Safety Card
Carbon dioxide
  • CARBON DIOXIDE
  • OXYGEN
  • OXYGEN (LIQUEFIED)
NFPA 704
Diamond Hazard Value Description
0
3 0
ox
Blue Health 3 Can cause serious or permanent injury.
Red Flammability 0 Will not burn under typical fire conditions.
Yellow Instability 0 Normally stable, even under fire conditions.
White Special OX Possesses oxidizing properties.
Note: NFPA ratings shown are for oxygen, CAS number 7782-44-7.
(NFPA, 2010)
General Description
Carbon dioxide-oxygen mixture is a colorless odorless gas. Both carbon dioxide and oxygen are noncombustible; however, oxygen can accelerate the burning of a fire. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket.

Hazards

Reactivity Alerts
Air & Water Reactions
Carbon dioxide is water soluble, and forms carbonic acid, a mild acid in water.
Fire Hazard
No information available.
Health Hazard
No information available.
Reactivity Profile
Pure oxygen is a potent oxidizer. The CO2 is inert, so much of the reactivity of this mixture is connected to the % content of each component. The higher the % content rare gas the less reactive in terms of it being an oxidizing agent. Dusts of magnesium, lithium, potassium, sodium, zirconium, titanium, and some magnesium-aluminum alloys, and heated aluminum, chromium, and magnesium when suspended in carbon dioxide are ignitable and explosive. This is especially true in the presence of strong oxidizers, such as peroxides. The presence of carbon dioxide in solutions of aluminum hydride in ether can cause violent decomposition on warming the residue, [J. Amer. Chem. Soc., 1948, 70, 877]. Dangers arising from the use of carbon dioxide in the fire prevention and extinguishing systems of confined volumes of air and flammable vapors are examined. The hazard associated with its use centers around the fact that large electrostatic discharges may be created that initiate explosion, [Quart. Saf. Summ., 1973, 44(1740, 10].
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

Use caution: Liquids with this reactive group classification have been known to react with the absorbents listed below.

Response Recommendations

Isolation and Evacuation
No information available.
Firefighting
No information available.
Non-Fire Response
No information available.
Protective Clothing
No information available.
DuPont Tychem® Suit Fabrics
No information available.
First Aid
No information available.

Physical Properties

Chemical Formula:
  • CO2
  • O2
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: data unavailable
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity: data unavailable
Boiling Point: data unavailable
Molecular Weight: data unavailable
Water Solubility: data unavailable
Ionization Energy/Potential: 13.77 eV [From NPG: Carbon dioxide] (NIOSH, 2024)
IDLH: 40000 ppm [From NPG: Carbon dioxide] (NIOSH, 2024)

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Carbon dioxide (124-38-9) 54000 mg/m3 72000 mg/m3 90000 mg/m3
(DOE, 2024)

Regulatory Information

EPA Consolidated List of Lists

No regulatory information available.

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names