IPCS INCHEM Home
NITROUS OXIDEICSC: 0067
June 2015
CAS #: 10024-97-2Hyponitrous acid anhydride
Laughing gas
Dinitrogen oxide
Dinitrogen monoxide
UN #: 1070 (compressed)
EINECS #: 233-032-0

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire.  Risk of fire and explosion. See Chemical Dangers.  NO contact with combustible substances.  Closed system, ventilation, explosion-proof electrical equipment and lighting.  In case of fire in the surroundings, use appropriate extinguishing media.  In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position. 

 STRICT HYGIENE!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Euphoria. Drowsiness. Dizziness. Unconsciousness.  Use ventilation. Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin ON CONTACT WITH LIQUID: FROSTBITE.  Cold-insulating gloves.  ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention . 
Eyes ON CONTACT WITH LIQUID: FROSTBITE.  Wear safety goggles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion      

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: self-contained breathing apparatus. Ventilation. NEVER direct water jet on liquid. If liquid: do NOT absorb in saw-dust or other combustible components. 

According to UN GHS Criteria

flam circlecylinder;gasexcl mark;warncancer;health haz
DANGER
May cause or intensify fire; oxidizer
Contains gas under pressure; may explode if heated
May cause drowsiness or dizziness
May damage fertility or the unborn child
Causes damage to the blood and the nervous system through prolonged or repeated exposure if inhaled 

Transportation
UN Classification
UN Hazard Class: 2.2; UN Subsidiary Risks: 5.1 

STORAGE
Fireproof if in building. Separated from reducing agents and combustible substances. Cool. 
PACKAGING
 
NITROUS OXIDE ICSC: 0067
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS COMPRESSED LIQUEFIED GAS WITH CHARACTERISTIC ODOUR. 

Physical dangers
The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. 

Chemical dangers
The substance is a strong oxidant above 300°C. It reacts violently with reducing agents and some combustible substances. This generates fire and explosion hazard. 

Formula: N2O
Molecular mass: 44.0
Boiling point: -88.5°C
Melting point: -90.8°C
Density (at the boiling point of the liquid): 1.28 kg/l
Solubility in water, g/l at 20°C: 1.2
Vapour pressure, kPa at 20°C: 5060
Relative vapour density (air = 1): 1.53  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation. 

Effects of short-term exposure
The liquid may cause frostbite. The substance may cause effects on the central nervous system. This may result in lowering of consciousness. 

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment. 

Effects of long-term or repeated exposure
The substance may have effects on the bone marrow and nervous system. May cause reproductive toxicity in humans. 


Occupational exposure limits
TLV: 50 ppm as TWA; A4 (not classifiable as a human carcinogen).
MAK: 180 mg/m3, 100 ppm; peak limitation category: II(2); pregnancy risk group: C 

ENVIRONMENT
 

NOTES
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
Other UN number: 2201 Nitrous oxide, refrigerated liquid. 

ADDITIONAL INFORMATION
  EC Classification
 

All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.
    See Also:
       Toxicological Abbreviations
       NITROUS OXIDE (JECFA Evaluation)
       Nitrous oxide (PIM 381)