International Chemical Safety Cards

2-BUTENE (MIXED ISOMERS) ICSC: 0838
2-BUTENE (MIXED ISOMERS)
beta-Butylene
Pseudo-butylene
1,2-Dimethylethylene
(cylinder)
CH3CH=CHCH3/C4H8
Molecular mass: 56.1
CAS # 107-01-7
RTECS # EM2932000
ICSC # 0838
UN # 1012
EC # 601-012-00-4
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Extremely flammable.
NO open flames, NO sparks, and NO smoking.
Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with water spray, foam, or dry chemical.
EXPLOSION Gas/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding). Use non-sparking handtools.
In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.
EXPOSURE


  • INHALATION
    		• Dizziness. Unconsciousness.
    		Ventilation, local exhaust, or breathing protection.
    		Fresh air, rest. 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

    		• Face shield.
    		First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
  • INGESTION

    		• Do not eat, drink, or smoke during work.

    SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid (extra personal protection: self-contained breathing apparatus).
    		Fireproof. Separated from acids. Cool.

    F symbol
    R: 13
    S: 9-16-33
    UN Hazard Class: 2.1
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 0838 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

    International Chemical Safety Cards

    2-BUTENE (MIXED ISOMERS) ICSC: 0838

    I
    M
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    D
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    A
    PHYSICAL STATE; APPEARANCE:
     COLOURLESS COMPRESSED LIQUEFIED GAS , WITH CHARACTERISTIC ODOUR (see Notes).

    PHYSICAL DANGERS:
     The vapour is heavier than air and may travel along the ground; distant ignition possible. As a result of flow, agitation, etc., electrostatic charges can be generated.

    CHEMICAL DANGERS:
     The substance can polymerize in contact with organic and inorganic acids, halogens and halogenic substances.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
     TLV not established.


    		ROUTES OF EXPOSURE:
     The substance can be absorbed into the body by inhalation of its vapour.

    INHALATION RISK:
     On loss of containment this gas can cause suffocation by lowering the oxygen content of the air in confined areas.

    EFFECTS OF SHORT-TERM EXPOSURE:
     Rapid evaporation of the liquid may cause frostbite. Exposure at high concentrations could cause lowering of consciousness.


    PHYSICAL
    PROPERTIES
    Boiling point: 3.7░C (cis) and 0.9░C (trans)░C
    Melting point: -139░C (cis) and -106░C (trans)░C
    Relative density (water = 1): 0.6213 (cis) and 0.6042 (trans)
    Solubility in water, g/100 ml at 20░C: none
    Relative vapour density (air = 1): >1
    		 Flash point: Flammable Gas
    Auto-ignition temperature: 324 (cis/trans)░C
    Explosive limits, vol% in air: 1.6-10 (cis/trans)
    Octanol/water partition coefficient as log Pow: 1.85 (calc.)
    ENVIRONMENTAL
    DATA
    NOTES
    This card refers to a mixture of cis-butene and trans-butene. Odour threshold recognition: cis 2-butene 28.5 mg/m3, trans 2-butene 2700 mg/m3. Check for peroxides prior to distillation; render harmless if positive. 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 and trans 2-butene.
    Transport Emergency Card: TEC (R)-500
    NFPA Code: H 1; F 4; R 0;
    ADDITIONAL INFORMATION


    ICSC: 0838 2-BUTENE (MIXED ISOMERS)
    © IPCS, CEC, 1993
    IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of 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.