International Chemical Safety Cards

ISOBUTENE ICSC: 1027
ISOBUTENE
Isobutylene
2-Methylpropene
(cylinder)
C4H8/CH2=C(CH3)2
Molecular mass: 56.1
CAS # 115-11-7
RTECS # UD0890000
ICSC # 1027
UN # 1055
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. NO contact with oxidizing materials.
Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with sand, powder, carbon dioxide.
EXPLOSION Gas/air mixtures are explosive. Risk of fire and explosion on contact with oxidants, halogens (see Chemical Dangers).
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 drums, etc., cool by spraying with water. Combat fire from a sheltered position.
EXPOSURE


  • INHALATION
    		• Dizziness. Drowsiness. Dullness. Nausea. Unconsciousness. Vomiting.
    		Closed system and ventilation.
    		Fresh air, rest. Artificial respiration if indicated. 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
    		• Frostbite.
    		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 take to a doctor.
  • INGESTION



    • SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Evacuate danger area! Consult an expert! Ventilation. Remove all sources of ignition. Do NOT wash away into sewer. NEVER direct water jet on liquid (extra personal protection: self-contained breathing apparatus).
    		Fireproof. Separated from incompatible substances (see Chemical Dangers). Cool.

    F symbol
    F+ symbol
    R: 12
    S: (2-)9-16-33
    Note: C
    UN Hazard Class: 2.1
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 1027 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

    ISOBUTENE ICSC: 1027

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    PHYSICAL STATE; APPEARANCE:
     COLOURLESS COMPRESSED LIQUEFIED GAS OR COLOURLESS VOLATILE LIQUID , WITH CHARACTERISTIC ODOUR.

    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:
     The substance can presumably form explosive peroxides. The substance is able to polymerize with fire or explosion hazard. Reacts violently with oxidants, chlorine, fluorine, nitrogen oxides, hydrogen chloride, hydrogen bromide, causing fire and explosion hazard.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
     MAK not established.


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

    INHALATION RISK:
     On loss of containment this liquid evaporates very quickly causing supersaturation of the air with serious risk of suffocation when in confined areas. A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20░C.

    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 death. Medical observation is indicated.

    EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
    PHYSICAL
    PROPERTIES
    Boiling point: -6.9░C
    Melting point: -140.3░C
    Relative density (water = 1): 0.59
    Solubility in water: practically insoluble
    Vapour pressure, kPa at 20░C: 1976
    		 Relative vapour density (air = 1): 1.94
    Flash point: flammable░C
    Auto-ignition temperature: 465░C
    Explosive limits, vol% in air: 1.8-9.6%
    ENVIRONMENTAL
    DATA
    N O T E S
    Density of the liquid at boiling point: 0.605 kg/l. 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.
    Transport Emergency Card: TEC (R)-502
    NFPA Code: H 1; F 4; R 0;
    ADDITIONAL INFORMATION


    ICSC: 1027 ISOBUTENE
    © 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.