ICSC 1199 - NITROGEN (LIQUIFIED)

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NITROGEN (LIQUIFIED)

ICSC: 1199
_{March 1999}

Liquid nitrogen
Nitrogen (refrigerated liquid)
Nitrogen (cryogenic liquid)

CAS No: 7727-37-9
RTECS No: QW9700000
UN No: 1977

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.	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.	UN Hazard Class: 2.2	Special insulated cylinder.

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 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	ENVIRONMENTAL DATA
Boiling point: -196°C Melting point: -210°C Density: 0.808kg/l at the boiling point of liquid 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.

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© IPCS 2004

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