INTOX Home Page
NITROGEN (LIQUIFIED) ICSC: 1199
Date of Peer Review: March 1999

Liquid nitrogen
Nitrogen (refrigerated liquid)
Nitrogen (cryogenic liquid)
CAS # 7727-37-9 N2
RTECS # QW9700000 Molecular mass: 28.01
UN # 1977
EC #
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.
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.
Safety goggles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion


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

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.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2004

SEE IMPORTANT INFORMATION ON BACK


NITROGEN (LIQUIFIED) ICSC: 1199
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
ODOURLESS COLOURLESS, EXTREMELY COLD LIQUID

PHYSICAL DANGERS:
The gas is heavier than air when cold and may accumulate in low ceiling spaces causing deficiency of oxygen.

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 liquid evaporates very quickly causing supersaturation of the air with serious risk of suffocation when in confined areas. See Notes.

EFFECTS OF SHORT-TERM EXPOSURE:
The liquid may cause frostbite.

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

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


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2004
See Also:
        Nitrogen (compressed gas) (ICSC)
        Nitrogen, gas (CHEMINFO)
        Nitrogen, liquid (CHEMINFO)