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METHYL BROMIDE
(cylinder)
ICSC: 0109
Peer-Review Status: 25.11.2009 Validated
Bromomethane
Monobromomethane 
CAS #: 74-83-9 RTECS #: PA4900000
UN #: 1062
EC #: 602-002-00-2
EINECS #: 200-813-2
    Formula: CH3Br
Molecular mass: 94.9

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible under specific conditions. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames. NO contact with aluminium, zinc, magnesium or pure oxygen.  Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with appropriate extinguishing agent. 
EXPLOSION Risk of fire and explosion on contact with aluminium, zinc, magnesium or oxygen.    In case of fire: keep cylinder cool by spraying with water. 
 
EXPOSURE   STRICT HYGIENE!  IN ALL CASES CONSULT A DOCTOR! FIRST AID: USE PERSONAL PROTECTION 
Inhalation Cough. Sore throat. Dizziness. Headache. Abdominal pain. Vomiting. Weakness. Shortness of breath. Confusion. Hallucinations. Loss of speech. Incoordination. Convulsions. Symptoms may be delayed. See Notes.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention. 
Skin MAY BE ABSORBED! Tingling sensation. Itching. Burning sensation. Redness. Blisters. Pain. ON CONTACT WITH LIQUID: FROSTBITE. Further see Inhalation.  Cold-insulating gloves. Protective clothing.  Rinse skin with plenty of water or shower. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer immediately for medical attention. 
Eyes Redness. Pain. Blurred vision. Temporary loss of vision.  Wear safety goggles, face shield or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion      

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. NEVER direct water jet on liquid.   
EC Classification
Symbol: T, N; R: 23/25-36/37/38-48/20-68-50-59; S: (1/2)-15-27-36/39-38-45-59-61 
UN Classification
UN Hazard Class: 2.3 
GHS Classification
Signal: Danger
Contains gas under pressure; may explode if heated
Toxic if inhaled (gas)
Causes skin irritation
Causes eye irritation
Causes damage to lungs, kidneys and central nervous system if inhaled
Causes damage to the liver, the kidneys and the central nervous system through prolonged or repeated exposure if inhaled
Harms public health and the environment by destroying ozone in the upper atmosphere 
cylinder;gasskull;toxiccancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H3; F1; R0.  Fireproof if in building. Separated from strong oxidants, aluminium and cylinders containing oxygen. Cool. Ventilation along the floor. 

IMPORTANT DATA
Physical State; Appearance
ODOURLESS COLOURLESS COMPRESSED LIQUEFIED GAS. 

Physical dangers
The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes including hydrogen bromide, bromine and carbon oxybromide. Reacts with strong oxidants. Attacks many metals in the presence of water. Attacks aluminium, zinc and magnesium. This produces pyrophoric compounds. This generates fire and explosion hazard. 

Occupational exposure limits
TLV: 1ppm as TWA; (skin); A4 (not classifiable as a human carcinogen); (ACGIH 2009).
MAK: Carcinogen category: 3B; Skin absorption (H); BLW issued; (DFG 2009). 

Routes of exposure
The substance can be absorbed into the body by inhalation and through the skin also as a vapour. 

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment. 

Effects of short-term exposure
The substance, as a liquid, is severely irritating to the skin. The substance, as a liquid, is irritating to the eyes and respiratory tract. Inhalation may cause lung oedema. See Notes. Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the central nervous system and kidneys. The effects may be delayed up to 48 hours. Exposure at high levels could cause death. Medical observation is indicated. 

Effects of long-term or repeated exposure
The substance may have effects on the nervous system, kidneys and liver. This may result in impaired functions. Animal tests show that this substance possibly causes toxicity to human reproduction or development. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 4°C
Melting point: -94°C
Relative density (water = 1): 1.7 (liquid, 0°C)
Solubility in water, g/100ml at 20°C: 1.5
Vapour pressure, kPa at 20°C: 1893
Relative vapour density (air = 1): 3.3
Flash point: 194°C
Auto-ignition temperature: 537°C
Explosive limits, vol% in air: 10-16
Octanol/water partition coefficient as log Pow: 1.19  
The substance is toxic to aquatic organisms. This substance may be hazardous to the environment. Special attention should be given to its impact on the ozone layer. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
Depending on the degree of exposure, periodic medical examination is suggested.
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.
Toxic effects on the nervous system may be delayed for several hours.
Immediate administration of an appropriate inhalation therapy by a doctor, or by an authorized person, should be considered.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations
       Methyl Bromide (EHC 166, 1995)
       Methyl bromide (PDS)
       Methyl bromide (PIM 340)
       Methyl bromide (FAO Meeting Report PL/1965/10/2)
       Methyl bromide (FAO/PL:CP/15)
       Methyl bromide (FAO/PL:1967/M/11/1)
       Methyl bromide (FAO/PL:1968/M/9/1)
       Methyl bromide (WHO Pesticide Residues Series 1)
       Methyl bromide (SIDS)
       Methyl Bromide (IARC Summary & Evaluation, Volume 71, 1999)