Difluorodibromomethane
Fluorocarbon 12-B2
CBr2F2
Molecular mass: 209.8
ICSC # 1419
CAS # 75-61-6
RTECS # PA7525000
UN # 1941
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Exposure
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•Inhalation
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Cough.
Sore throat.
Laboured breathing.
Shortness of breath.
Confusion.
Drowsiness.
Unconsciousness.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Half-upright position.
Artificial respiration may be needed.
Refer for medical attention.
See Notes.
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•Skin
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Protective gloves.
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Rinse and then wash skin with water and soap.
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•Eyes
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Ventilation.
Do NOT let this chemical enter the environment.
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See Chemical Dangers.
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UN Hazard Class: 9
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS
GAS
OR
LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
The gas is heavier than air
and may accumulate in lowered spaces causing a deficiency of oxygen.
Chemical Dangers:
The substance decomposes
on contact with
hot surfaces or flames
producing
toxic and corrosive gases
including
hydrogen bromide
,
hydrogen fluoride
.
Reacts
with
alkali metals
, powdered
aluminium
, magnesium and
zinc
.
Occupational Exposure Limits:
TLV: 100 ppm as TWA; (ACGIH 2003).
MAK: 100 ppm, 870 mg/m3
Peak limitation category: II(2);
(DFG 2003).
OSHA PEL: TWA 100 ppm (860 mg/m3)
NIOSH REL: TWA 100 ppm (860 mg/m3)
NIOSH IDLH: 2000 ppm See: 75616
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation.
Inhalation Risk:
On loss of containment, a harmful concentration of this gas in the air will be reached very quickly.
Effects of Short-Term Exposure:
The substance
is irritating to
the respiratory tract
.
Inhalation of the substance at high levels may cause lung oedema (see Notes).
The substance may cause effects on the
central nervous system
.
Exposure could cause lowering of consciousness.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 22.8°C
Melting point: -101.1°C
Density: 8.7
kg/m3
Density: 2.27
g/cm3
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(for gas)
(for liquid)
Solubility in water:
none
Vapour pressure, kPa at 20°C: 83
Relative vapour density (air = 1): 7.2
Octanol/water partition coefficient as log Pow: 1.99
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Environmental
Data
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This substance may be hazardous in the environment; special attention should be given to its impact on the ozone layer.
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N O T E S
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Check oxygen content before entering area.
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 is therefore essential.
Chlorofluorocarbons are known to cause effect on the cardiovascular system.
Freon 12-B2 and Halon 1202 are trade names.
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ADDITIONAL INFORMATION
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ICSC: 1419
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DIBROMODIFLUOROMETHANE
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(C) IPCS, CEC, 1994
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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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