Hydrobromic acid
HBr
Molecular mass: 80.9
(cylinder)
ICSC # 0282
CAS # 10035-10-6
RTECS # MW3850000
UN # 1048 (anhydrous)
EC # 035-002-00-0
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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.
Heating will cause rise in pressure with risk of bursting.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Risk of fire and explosion on contact with metals as a result of hydrogen formation.
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In case of fire: cool cylinder by spraying with water but avoid contact of the substance with water.
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Exposure
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AVOID ALL CONTACT!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Burning sensation.
Cough.
Sore throat.
Laboured breathing.
Shortness of breath.
Symptoms may be delayed (see Notes).
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Half-upright position.
Refer for medical attention.
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•Skin
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ON CONTACT WITH LIQUID: FROSTBITE.
Redness.
Pain.
Blisters.
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Cold-insulating gloves.
Protective clothing.
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ON FROSTBITE: rinse with plenty of water, do NOT remove clothes.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
Severe deep burns.
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Eye protection in combination with breathing protection.
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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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Evacuate danger area!
Consult an expert!
Ventilation.
NEVER direct water jet on liquid.
Remove gas with fine water spray.
Gas-tight chemical protection suit including self-contained breathing apparatus.
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Separated from
incompatible materials
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See Chemical Dangers.
Cool.
Dry.
Ventilation along the floor.
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C symbol
R: 35-37
S: 1/2-7/9-26-45
UN Hazard Class: 2.3
UN Subsidiary Risks: 8
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Important Data
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Physical State; Appearance:
COLOURLESS
COMPRESSED LIQUEFIED GAS
, WITH PUNGENT ODOUR.
Physical Dangers:
The gas is heavier than air.
Chemical Dangers:
The solution in water is a strong acid, it reacts violently with bases and is corrosive.
Reacts
violently with
strong oxidants
and many
organic compounds
causing fire and explosion hazard.
Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001).
Occupational Exposure Limits:
TLV: 2 ppm (Ceiling value); (ACGIH 2004).
MAK: 2 ppm, 6.7 mg/m3
Peak limitation category: I(1); Pregnancy risk group: D
(DFG 2006).
OSHA PEL: TWA 3 ppm (10 mg/m3)
NIOSH REL: C 3 ppm (10 mg/m3)
NIOSH IDLH: 30 ppm See: 10035106
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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 corrosive to
the eyes,
the skin
and
the respiratory tract.
Inhalation of the gas may cause lung oedema (see Notes).
Rapid evaporation of the liquid may cause frostbite.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: -67°C
Melting point: -87°C
Relative density (water = 1): 1.8
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Solubility in water, g/100 ml at 20°C: 193
Vapour pressure, kPa at 20°C: 2445
Relative vapour density (air = 1): 2.8
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Environmental
Data
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N O T E S
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The occupational exposure limit value should not be exceeded during any part of the working exposure.
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.
Do NOT spray water on leaking cylinder (to prevent corrosion of cylinder).
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
Other UN number: 1788 Hydrobromic acid (solution), hazard class 8.
Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
Transport Emergency Card: TEC (R)-20S1048 or 20G2TC
NFPA Code: H 3; F 0; R 0;
Card has been partially updated in July 2007: see Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 0282
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HYDROGEN BROMIDE
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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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