NITROGEN (LIQUIFIED)

ICSC: 1199

NITROGEN (LIQUIFIED)
Liquid nitrogen
Nitrogen (refrigerated liquid)
Nitrogen (cryogenic liquid)
(liquefied)
N₂
Molecular mass: 28.01
CAS # 7727-37-9
RTECS # QW9700000
ICSC # 1199
UN # 1977

TYPES OF HAZARD/ EXPOSURE	ACUTE HAZARDS/ SYMPTOMS	PREVENTION	FIRST AID/ FIRE FIGHTING
FIRE	Not combustible.		In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION

EXPOSURE
INHALATION	Unconsciousness. Weakness. Death. See Notes.	Ventilation. Breathing protection.	Fresh air, rest. Artificial respiration if indicated. Oxygen may be beneficial if administered by a trained person on physician's advice. 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.	Face shield or eye protection in combination with breathing protection.	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 (extra personal protection: self-contained breathing apparatus).

Keep in a well-ventilated room.

Special insulated cylinder.
UN Hazard Class: 2.2

SEE IMPORTANT INFORMATION ON BACK

ICSC: 1199

Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

NITROGEN (LIQUIFIED)

ICSC: 1199

I
M
P
O
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T
A
N
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D
A
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A

PHYSICAL STATE; APPEARANCE:
ODOURLESS, COLOURLESS, EXTREMELY COLD LIQUID.

PHYSICAL DANGERS:
Cold gas is heavier than air and can accumulate close to ground level causing oxygen deficiency with risk of suffocation.

CHEMICAL DANGERS:
Reacts with oxygen and hydrogen on sparking forming nitric oxide and ammonia. Combines directly with lithium and at red heat with calcium, strontium and barium to form nitrides. Forms cyanides when heated with carbon in presence of alkalies or barium oxides.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV not established.

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:
Inhalation of gas may cause asphyxia. The liquid may cause frostbite.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: -195.8°C
Melting point: -210°C

Relative density (water = 1): see Notes
Solubility in water: none

ENVIRONMENTAL
DATA

NOTES

Density of the liquid at boiling point: 0.808 kg/l. High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death. Check oxygen content before entering area. Effects are the result of oxygen deficiency. Do not attempt rescue without air supplied respirator.

Transport Emergency Card: TEC (R)-112
NFPA Code: H 3; F 0; R 0;

ADDITIONAL INFORMATION

ICSC: 1199	NITROGEN (LIQUIFIED)
© IPCS, CEC, 1993

IMPORTANT LEGAL NOTICE:

Neither the CEC or 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. 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.