International Chemical Safety Cards

METHYL BROMIDE ICSC: 0394
METHYL BROMIDE
Bromomethane
(liquefied)
CH3Br
Molecular mass: 95
CAS # 74-83-9
RTECS # PA4900000
ICSC # 0394
UN # 1062
EC # 602-002-00-3
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Heating will cause rise in pressure with risk of bursting. See Notes.
NO open flames, NO sparks, and NO smoking. NO contact with strong oxidizing agents. NO contact with hot surfaces.
Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with water spray. If extinguished, risk of explosive re-ignition. Fire fighters should wear complete protective clothing including self-contained breathing apparatus.
EXPLOSION Gas/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools. Prevent build-up of electrostatic charges (e.g., by grounding).
In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.
EXPOSURE
AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
  • INHALATION
    		• Abdominal pain, confusion, drowsiness, headache, digestive problems nausea. Symptoms may be delayed (see Notes).
    		Ventilation, local exhaust, or breathing protection.
    		Fresh air, rest, half-upright position, artificial respiration if indicated, and refer for medical attention.
  • SKIN
    		• MAY BE ABSORBED! Redness, roughness, liquid causes skin burns, blisters.
    		Protective gloves.
    		Remove contaminated clothes, rinse skin with plenty of water or shower, and refer for medical attention.
  • EYES
    		• Liquid splashes can cause redness, conjuctivitis, severe deep burns.
    		Safety goggles 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. Eliminate ignition sources and stop flow of gas if possible (extra personal protection: complete protective clothing including self-contained breathing apparatus).
    		Separated from strong oxidants, aluminium, food and feedstuffs, rubbers. Cool. Store outside or in separate building.
    		Do not transport with food and feedstuffs.
    T+ symbol
    R: 26
    S: 1/2-7/9-24/25-27-45
    UN Hazard Class: 2.3
    UN Subsidiary Risks: 6.1
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 0394 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

    METHYL BROMIDE ICSC: 0394

    I
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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.

    CHEMICAL DANGERS:
     Upon heating, toxic fumes are formed. Reacts with strong oxidants, aluminium and rubber.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
     TLV: ppm; 5 mg/m3 19 (skin) (ACGIH 1991-1992).


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

    INHALATION RISK:
     A harmful concentration of this gas in the air will be reached very quickly on loss of containment. 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:
     The substance irritates the respiratory tract. Inhalation of gas may cause lung oedema (see Notes). The substance may cause effects on the central nervous system , resulting in psychological disturbances. Exposure to the substance could cause lowering of consciousness. Exposure by inhalation may result in death.

    EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
     Repeated or prolonged contact with skin may cause dermatitis. Lungs may be affected by repeated or prolonged exposure resulting in bronchospasms. The substance may have effects on the central nervous system, liver and kidney , resulting in paralysis, pschychological disorders, hallucinations, brain damage and impaired kidney and liver function.
    PHYSICAL
    PROPERTIES
    Boiling point at 101.3 kPa: 4░C
    Melting point: -93.7░C
    Relative density (water = 1): 1.732
    Solubility in water, g/100 ml at 15░C: 4.84
    Vapour pressure, kPa at 15░C: 53
    		 Relative vapour density (air = 1): 3.36
    Flash point: Flammable Gas
    Auto-ignition temperature: 536.7░C
    Explosive limits, vol% in air: 10.0-16.0
    ENVIRONMENTAL
    DATA
    NOTES
    The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Do NOT use in the vicinity of a fire or a hot surface, or during welding.
    ADDITIONAL INFORMATION


    ICSC: 0394 METHYL BROMIDE
    © 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.