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n-BUTENEICSC: 0396
Ethylethylene
n-Butylene
1-Butene
March 1999
CAS #: 106-98-9
UN #: 1012
EC Number: 203-449-2

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Extremely flammable.  Gas/air mixtures are explosive.  NO open flames, NO sparks and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting.  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 Suffocation.  Use 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 ON CONTACT WITH LIQUID: FROSTBITE.  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
Evacuate danger area! Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. Remove all ignition sources. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 2.1 

STORAGE
Fireproof. Cool. Ventilation along the floor. 
PACKAGING
 
n-BUTENE ICSC: 0396
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
ODOURLESS COLOURLESS COMPRESSED LIQUEFIED GAS. 

Physical dangers
The gas is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
The substance may polymerize. Reacts violently with oxygen and oxidants. This generates fire and explosion hazard. 

Formula: C4H8 / CH3CH2CH=CH2
Molecular mass: 56.1
Boiling point: -6°C
Melting point: -185°C
Solubility in water: none
Vapour pressure, kPa at 21°C: 464
Relative vapour density (air = 1): 1.93
Flash point: Flammable gas
Auto-ignition temperature: 385°C
Explosive limits, vol% in air: 1.6-10.0 


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. 

Inhalation risk
On loss of containment this substance can cause suffocation by lowering the oxygen content of the air in confined areas. 

Effects of long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 250 ppm as TWA 

ENVIRONMENT
 

NOTES
Health effects of exposure to the substance have not been investigated.
Check oxygen content before entering area. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F+; R: 12; S: (2)-9-16-33; Note: C 

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    See Also:
       Toxicological Abbreviations