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NIOSH

METHYL BROMIDE

ICSC: 0109

Bromomethane
Monobromomethane
CH3Br
Molecular mass: 94.9
(cylinder)
ICSC # 0109 		CAS # 74-83-9
RTECS # PA4900000
UN # 1062
EC # 602-002-00-2
April 22, 1994 Validated
Fi, review at IHE: 10/09/89

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 - use appropriate extinguishing agent .
EXPLOSION Risk of fire and explosion on contact with aluminium, zinc or magnesium.

In case of fire: keep cylinder cool by spraying with water.
EXPOSURE
STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!
IN ALL CASES CONSULT A DOCTOR!
•INHALATION Dizziness. Headache. Abdominal pain. Vomiting. Weakness. Hallucinations. Loss of speech. Incoordination. Laboured breathing. Convulsions.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
•SKIN MAY BE ABSORBED! Tingling. Itching. Burning sensation. Redness. Blisters. Pain. ON CONTACT WITH LIQUID: FROSTBITE. (Further see Inhalation).
Cold-insulating gloves. Protective clothing.
ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
•EYES Redness. Pain. Blurred vision. Temporary loss of vision.
Safety goggles , 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. NEVER direct water jet on liquid. Personal protection: complete protective clothing including self-contained breathing apparatus.
Fireproof if in building. Separated from strong oxidants, aluminium and cylinders containing oxygen. Cool. Ventilation along the floor.

T symbol
N symbol
R: 23/25-36/37/38-48/20-68-50-59
S: 1/2-15-27-36/39-38-45-59-61
UN Hazard Class: 2.3
ICSC: 0109 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

METHYL BROMIDE

ICSC: 0109

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PHYSICAL STATE; APPEARANCE:
ODOURLESS AND COLOURLESS COMPRESSED LIQUEFIED GAS.

PHYSICAL DANGERS:
The gas is heavier than air.

CHEMICAL DANGERS:
The substance decomposes on heating and on burning producing toxic and corrosive fumes including hydrogen bromide, bromine and carbon oxybromide. Reacts with strong oxidants. Attacks many metals in presence of water. Attacks aluminium, zinc and magnesium with formation of pyrophoric compounds , causing fire and explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 1 ppm as TWA; (skin); A4 (not classifiable as a human carcinogen); (ACGIH 2004).
MAK: skin absorption (H);
Carcinogen category: 3B;
(DFG 2004).
OSHA PEL†: C 20 ppm (80 mg/m3) skin
NIOSH REL: Ca See Appendix A
NIOSH IDLH: Ca 250 ppm See: 74839


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 irritates the eyes, the skin and the respiratory tract. Inhalation of the substance may cause lung oedema (see Notes). Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the central nervous system , kidneys and lungs . Exposure to high concentrations may result in death. The effects may be delayed.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the nervous system,kidneys, heart,liverandlungs.

PHYSICAL
PROPERTIES

Boiling point: 4°C
Melting point: -94°C
Relative density (water = 1): 1.7
Solubility in water, ml/100 ml at 20°C: 1.5
Relative vapour density (air = 1): 3.3
Auto-ignition temperature: 537°C
Explosive limits, vol% in air: 10-16
Octanol/water partition coefficient as log Pow: 1.19

ENVIRONMENTAL
DATA

This substance may be hazardous in the environment; special attention should be given to fish, mammals, plants, soil organisms.

N O T E S

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. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. The odour warning when the exposure limit value is exceeded is insufficient. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Bromo-O-gas, Dowfume, Embafume, Halon 1001, Haltox, Meth-o-gas, Terabol and Terr-o-Gas 100 are trade names. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
Transport Emergency Card: TEC (R)-20S1062

NFPA Code: H 3; F 1; R 0;

ADDITIONAL INFORMATION



ICSC: 0109 METHYL BROMIDE
(C) IPCS, CEC, 1994
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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