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SULFURYL FLUORIDEICSC: 1402
October 2001
CAS #: 2699-79-8Sulfuryl difluoride
Sulfuric oxyfluoride
UN #: 2191
EINECS #: 220-281-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.        In case of fire in the surroundings, use appropriate extinguishing media.  In case of fire: keep cylinder cool by spraying with water. 

 STRICT HYGIENE!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat. Nausea. Vomiting. Tremor.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer for medical attention. See Notes. 
Skin ON CONTACT WITH LIQUID: FROSTBITE.  Cold-insulating gloves.  ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. 
Eyes Redness.  Wear 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 refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.   

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
NEVER direct water jet on liquid. Remove vapour with fine water spray. Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 2.3 

STORAGE
Fireproof if in building. Keep in a well-ventilated room. Cool. Separated from food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs. 
SULFURYL FLUORIDE ICSC: 1402
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS ODOURLESS COMPRESSED OR LIQUEFIED GAS. 

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 hydrogen fluoride and sulfur oxides. 

Formula: SO2F2
Molecular mass: 102,0
Boiling point: -55.3°C
Melting point: -135.8°C
Density: 3.72 g/l
Solubility in water, ml/100ml: 4-5
Vapour pressure, kPa at 21.1°C: 1.7x10^3
Relative vapour density (air = 1): 3.5  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is severely irritating to the respiratory tract. The substance may cause effects on the central nervous system. This may result in convulsions and respiratory failure. Inhalation of this gas may cause lung oedema. See Notes. Exposure could cause death. Rapid evaporation of the liquid may cause frostbite. 

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

Effects of long-term or repeated exposure
 


Occupational exposure limits
TLV: 5 ppm as TWA; 10 ppm as STEL 

ENVIRONMENT
 

NOTES
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation is therefore essential.
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering area.
There is no odour warning even when toxic concentrations are present. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T, N; R: 23-48/20-50; S: (1/2)-45-63-60-61 

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    See Also:
       Toxicological Abbreviations
       Sulfuryl fluoride (JMPR Evaluations 2005 Part II Toxicological)