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VINYLIDENE FLUORIDEICSC: 0687
1,1-Difluoroethylene
1,1-Difluoroethene
R1132a
Vinylidene difluoride
August 1997
CAS #: 75-38-7
UN #: 1959
EC Number: 200-867-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire.  Gas/air mixtures are explosive. Explosive.  NO open flames, NO sparks and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state. Use non-sparking handtools.  Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with powder, carbon dioxide.  In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position. 

   
  SYMPTOMS PREVENTION FIRST AID
Inhalation   Use ventilation.  Fresh air, rest. 
Skin ON CONTACT WITH LIQUID: FROSTBITE.  Cold-insulating gloves. Protective clothing.  ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention . 
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 CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid. Personal protection: complete protective clothing including self-contained breathing apparatus. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 2.1 

STORAGE
Fireproof. Separated from incompatible materials. See Chemical Dangers. Store only if stabilized. 
PACKAGING
 
VINYLIDENE FLUORIDE ICSC: 0687
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS COMPRESSED LIQUEFIED GAS WITH CHARACTERISTIC ODOUR. 

Physical dangers
The gas is heavier than air and may travel along the ground; distant ignition possible. The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. As a result of flow, agitation, etc., electrostatic charges can be generated. 

Chemical dangers
The substance can form explosive peroxides. The substance may polymerize. This generates a large amount of heat, with fire or explosion hazard. Heating may cause violent combustion or explosion. Decomposes on heating and on burning. This produces toxic and corrosive fumes including hydrogen fluoride, fluorine and fluorides. Reacts violently with oxidants and many other materials. This generates fire and explosion hazard. 

Formula: C2H2F2 / CH2=CF2
Molecular mass: 64.04
Boiling point: -83°C
Melting point: -144°C
Relative density (water = 1): 0.6
Solubility in water: none
Relative vapour density (air = 1): 2.2
Flash point: Flammable gas
Auto-ignition temperature: 640°C
Explosive limits, vol% in air: 5.5-21.3
Octanol/water partition coefficient as log Pow: 1.24  


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 may cause effects on the central nervous system. 

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: 500 ppm as TWA; A4 (not classifiable as a human carcinogen).
MAK: carcinogen category: 3B 

ENVIRONMENT
 

NOTES
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering the area.
Vapours are uninhibited and may form polymers in the vents or flame arresters causing blockage.
Do NOT use in the vicinity of a fire or a hot surface, or during welding.
Check for peroxides prior to distillation; eliminate if found.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
See ICSC 0083. 

ADDITIONAL INFORMATION
  EC Classification
 

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