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NIOSH

NITROGEN (LIQUIFIED)

ICSC: 1199

Liquid nitrogen
Nitrogen (refrigerated liquid)
Nitrogen (cryogenic liquid)
N2
Molecular mass: 28.01
ICSC # 1199 		CAS # 7727-37-9
RTECS # QW9700000
UN # 1977
March 23, 1999 Validated

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
ICSC: 1199 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

NITROGEN (LIQUIFIED)

ICSC: 1199

I

M

P

O

R

T

A

N

T


D

A

T

A

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.
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