2-Butene, (E)-
trans-Dimethylethylene
beta-trans-Butylene
C4H8 / CH3HC=CHCH3
Molecular mass: 56.1
(cylinder)
ICSC # 0398
CAS # 624-64-6
UN # 1012
EC # 601-012-00-4
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Extremely flammable.
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NO open flames, NO sparks, and NO smoking.
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Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with
water spray.
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Explosion
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Gas/air mixtures are explosive.
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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.
Flame arrester to prevent flash-back from burner to cylinder.
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In case of fire: keep cylinder cool by spraying with water.
Combat fire from a sheltered position.
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Exposure
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•Inhalation
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Dizziness.
Unconsciousness.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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ON CONTACT WITH LIQUID: FROSTBITE.
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Cold-insulating gloves.
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ON FROSTBITE: rinse with plenty of water, do NOT remove clothes.
Refer for medical attention.
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•Eyes
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See Skin.
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Face shield.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Evacuate danger area!
Consult an expert!
Ventilation.
NEVER direct water jet on liquid.
Personal protection:
chemical protection suit including self-contained breathing apparatus.
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Fireproof.
Store outside or in a separate well-ventilated building.
Cool.
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Note: C
F+ symbol
R: 12
S: 2-9-16-33
UN Hazard Class: 2.1
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Important Data
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Physical State; Appearance:
COLOURLESS
COMPRESSED LIQUEFIED GAS.
Physical Dangers:
The gas is heavier than air
and may travel along the ground; distant ignition possible,
and may accumulate in low ceiling spaces causing deficiency of oxygen.
As a result of flow, agitation, etc., electrostatic charges can be generated.
Chemical Dangers:
Occupational Exposure Limits:
TLV not established.
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation.
Inhalation Risk:
On loss of containment this liquid evaporates very quickly displacing the air and causing a serious risk of suffocation when in confined areas.
Effects of Short-Term Exposure:
Rapid evaporation of the liquid may cause frostbite.
The substance may cause effects on the central nervous system.
Exposure may result in unconsciousness.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 1°C
Melting point: -105°C
Relative density (water = 1): 0.6
Solubility in water:
none
Vapour pressure, kPa at 20°C: 212
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Relative vapour density (air = 1): 1.9
Flash point: Flammable gas
Auto-ignition temperature: 324°C
Explosive limits, vol% in air: 1.8-9.7
Octanol/water partition coefficient as log Pow: 2.31
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Environmental
Data
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N O T E S
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High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering area.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
The recommendations on this Card also apply to cis-2-butene (ICSC 0397).
Card has been partly updated in October 2005. See section Emergency Response.
Transport Emergency Card: TEC (R)-20S1012 or 20G2F
NFPA Code: H1; F4; R0
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ADDITIONAL INFORMATION
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ICSC: 0398
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trans-2-BUTENE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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