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SULFURYL FLUORIDEICSC: 1402
Sulfuryl difluoride
Sulfuric oxyfluoride
November 2019
CAS #: 2699-79-8
UN #: 2191
EC Number: 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 PREVENTION FIRST AID
Inhalation Sore throat. Cough. Shortness of breath. Nausea. Vomiting. Weakness. Heart palpitations. Convulsions. Unconsciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer immediately 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. Refer immediately for medical attention . 
Eyes Redness. ON CONTACT WITH LIQUID: FROSTBITE.  Wear face shield or eye protection in combination with breathing protection.  ON FROSTBITE: rinse with plenty of water. Refer immediately for medical attention. Keep rinsing during transport for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.   

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus. Isolate the area until the gas has dispersed. Shut off cylinder if possible. Remove vapour with fine water spray. Do NOT let this chemical enter the environment. 

According to UN GHS Criteria

cylinder;gasskull;toxicenviro;aqua
DANGER
Contains gas under pressure; may explode if heated
Toxic if inhaled
May cause respiratory irritation
Very toxic to aquatic life 

Transportation
UN Classification
UN Hazard Class: 2.3 

STORAGE
Fireproof if in building. Cool. Ventilation along the floor. 
PACKAGING
 
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. See Notes. 

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 (soluble)
Vapour pressure, kPa at 21.1°C: 1700
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
Rapid evaporation of the liquid may cause frostbite. 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 high concentrations may cause lung oedema. The effects may be delayed. See Notes. Exposure could cause death. 

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
The substance is very toxic to aquatic organisms. 

NOTES
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 are 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
 

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