Liquid nitrogen
Nitrogen (refrigerated liquid)
Nitrogen (cryogenic liquid)
N2
Molecular mass: 28.01
ICSC # 1199
CAS # 7727-37-9
RTECS # QW9700000
UN # 1977
|
|
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
|
Storage
|
Packaging & Labelling
|
Ventilation.
NEVER direct water jet on liquid.
Chemical protection suit including self-contained breathing apparatus.
|
Fireproof if in building.
Keep in a well-ventilated room.
|
Special insulated cylinder.
UN Hazard Class: 2.2
|
|
|
|
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.
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 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.
Effects of Long-Term or Repeated Exposure:
|
|
Physical
Properties
|
Boiling point: -196°C
Melting point: -210°C
|
Density: 0.808kg/l at the boiling point of liquid
Solubility in water: poor
|
|
Environmental
Data
|
|
|
N O T E S
|
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.
Transport Emergency Card: TEC (R)-20S1977 or 20G3A
NFPA Code: H3; F0; R0;
|
|
|
ADDITIONAL INFORMATION
|
|
|
|
ICSC: 1199
|
NITROGEN (LIQUIFIED)
|
|
(C) IPCS, CEC, 1994
|
|
|
IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
|
|
|
