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NITROGEN TRIFLUORIDE
(cylinder)
ICSC: 1234
Peer-Review Status: 27.10.2004 Validated
Nitrogen fluoride
Trifluoroamine
Trifluoroammonia
Perfluoroammonia 
CAS #: 7783-54-2 RTECS #: QX1925000
UN #: 2451
EINECS #: 232-007-1
    Formula: NF3
Molecular mass: 71.0

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire. Heating will cause rise in pressure with risk of bursting.  NO contact with flammables. NO contact with reducing agents.  In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION     In case of fire: keep cylinder cool by spraying with water. 
 
EXPOSURE      
Inhalation   Use ventilation, local exhaust or breathing protection.  Fresh air, rest. 
Skin     Remove contaminated clothes. 
Eyes   Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion      

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Ventilation. NEVER direct water jet on liquid. Personal protection: self-contained breathing apparatus.   
EC Classification
 
UN Classification
UN Hazard Class: 2.2; UN Subsidiary Risks: 5.1 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-20G1O.  Fireproof if in building. Separated from combustible substances and reducing agents. Cool. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS GAS WITH CHARACTERISTIC ODOUR. 

Physical dangers
The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. 

Chemical dangers
Decomposes on heating. This produces toxic fumes including fluoride. The substance is a strong oxidant. It reacts with combustible and reducing materials. Reacts violently with ammonia, carbon monoxide, diborane, hydrogen, hydrogen sulfide, methane and tetrafluorohydrazine. This generates explosion hazard. Attacks metals. The substance is decomposed by electric sparks. 

Occupational exposure limits
TLV: 10ppm as TWA; BEI issued; (ACGIH 2004). 

Routes of exposure
The substance can be absorbed into the body by inhalation. 

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment. 

Effects of short-term exposure
 

Effects of long-term or repeated exposure
The substance may have effects on the liver and kidneys. Repeated or prolonged inhalation may cause fluorosis. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: -129°C
Melting point: -208.5°C
Relative density (water = 1): see Notes
Solubility in water: none
Relative density of the vapour/air-mixture at 20°C (air = 1): 2.45 
 

NOTES
Density of the liquid at boiling point: 1.885 kg/l.
The odour warning when the exposure limit value is exceeded is insufficient.
Methemoglobinemia has been observed in animals, but relevance to humans is unclear.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
Wear protective equipment during this operation.
Check oxygen content before entering area.
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations