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NITROGEN (LIQUIFIED)
ICSC: 1199
Peer-Review Status: 23.03.1999 Validated
Liquid nitrogen
Nitrogen (refrigerated liquid)
Nitrogen (cryogenic liquid) 
CAS #: 7727-37-9 RTECS #: QW9700000
UN #: 1977
EINECS #: 231-783-9
    Formula: N2
Molecular mass: 28.01

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible. Heating will cause rise in pressure with risk of bursting.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE      
Inhalation Suffocation. See Notes.  Use ventilation.  Fresh air, rest. Artificial respiration may be needed. 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 Pain. Severe deep burns. Further see Skin.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion      

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Ventilation. NEVER direct water jet on liquid. Personal protection: chemical protection suit including self-contained breathing apparatus.  Special insulated cylinder. 
EC Classification
 
UN Classification
UN Hazard Class: 2.2 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-20S1977 or 20G3A.
NFPA Code: H3; F0; R0. 
Fireproof if in building. Keep in a well-ventilated room. 

IMPORTANT DATA
Physical State; Appearance
ODOURLESS COLOURLESS EXTREMELY COLD LIQUID. 

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

Chemical dangers
 

Occupational exposure limits
TLV (SIMPLE-ASPHYXIANT): (ACGIH 2004). 

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

Inhalation risk
On loss of containment this substance can cause serious risk of suffocation when in confined areas. See Notes. 

Effects of short-term exposure
The liquid may cause frostbite. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: -196°C
Melting point: -210°C
Density (at the boiling point of the liquid): 0.808 kg/l
Solubility in water: poor 
 

NOTES
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering area.
Card has been partly updated in April 2005. See sections Emergency Response, Occupational Exposure Limits. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations