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DIBROMOMETHANE
ICSC: 0354
Peer-Review Status: 12.04.2013 Validated
Methylene bromide
Methylene dibromide 
CAS #: 74-95-3 RTECS #: PA7350000
UN #: 2664
EC #: 602-003-00-8
EINECS #: 200-824-2
    Formula: CH2Br2
Molecular mass: 173.8

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.  See Chemical Dangers.  In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION Heating will cause rise in pressure with risk of bursting. Risk of fire and explosion. See Chemical Dangers.  See Chemical Dangers  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   PREVENT GENERATION OF MISTS! STRICT HYGIENE!   
Inhalation Cough. Dizziness. Drowsiness. Headache. Nausea. Weakness. Unconciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Administration of oxygen may be needed. Artificial respiration may be needed. Refer for medical attention. 
Skin Dry skin. Redness.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness.  Wear safety spectacles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion See Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: Xn; R: 20-52/53; S: (2)-24-61 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 
GHS Classification
Signal: Warning
Harmful if swallowed
Harmful if inhaled vapour
Causes skin and eye irritation
May cause damage to central nervous system, blood and cardiovascular system
May cause drowsiness or dizziness
May cause damage to central nervous system, liver, kidneys and lungs through prolonged or repeated exposure
May be harmful if swallowed and enters airways
May cause long lasting harmful effects to aquatic life 
excl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Separated from food and feedstuffs, strong oxidants, strong bases and metals. Do NOT store or transport in containers made from aluminium or plastic. Ventilation along the floor. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
The vapour is heavier than air. 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes including hydrogen bromide and carbon monoxide (see ICSC 0023). Reacts violently with strong oxidants, strong bases and some metals such as aluminium, magnesium and potassium. This generates fire and explosion hazard. Attacks some forms of plastic, rubber and coatings. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):.
MAK (not established):. 

Routes of exposure
The substance can be absorbed into the body by inhalation, by ingestion and through the skin. 

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. 

Effects of short-term exposure
The substance is mildly irritating to the eyes, skin and respiratory tract. If swallowed the substance may cause vomiting and could result in aspiration pneumonitis. The substance may cause effects on the central nervous system, blood and heart. Exposure could cause carbon monoxide poisoning. This may result in impaired functions. The effects may be delayed. Exposure at high concentrations could cause unconsciousness or death. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the central nervous system, liver, kidneys and lungs. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 97°C
Melting point: -52.7°C
Relative density (water = 1): 2.5
Solubility in water, g/100ml at 15°C: 1.2 (moderate)
Vapour pressure, kPa at 20°C: 4.7
Relative vapour density (air = 1): 6.0
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.2
Octanol/water partition coefficient as log Pow: 1.88 (estimated)
Viscosity: 0.39 mm²/s at 25°C
Auto-ignition temperature: 515°C  
The substance is harmful to aquatic organisms. The substance may cause long-term effects in the aquatic environment. 

NOTES
Do NOT use in the vicinity of a fire or a hot surface, or during welding. 

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