Chlorine cyanide
Chlorocyanide
Chlorocyanogen
ClCN
Molecular mass: 61.5
(cylinder)
ICSC # 1053
CAS # 506-77-4
RTECS # GT2275000
UN # 1589 (inhibited)
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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.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: all extinguishing agents allowed.
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Explosion
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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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•Inhalation
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Sore throat.
Drowsiness.
Confusion.
Nausea.
Vomiting.
Cough.
Unconsciousness.
Symptoms may be delayed (see Notes).
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Local exhaust or breathing protection.
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Fresh air, rest.
Half-upright position.
Artificial respiration if indicated.
Refer for medical attention.
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•Skin
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ON CONTACT WITH LIQUID: FROSTBITE.
THE LIQUID MAY BE ABSORBED.
Redness.
Pain.
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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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ON CONTACT WITH LIQUID: FROSTBITE.
Redness.
Pain.
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Face shield,
or 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 vapour cloud with fine water spray.
Do NOT wash away into sewer.
Chemical protection suit including self-contained breathing apparatus.
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Fireproof if in building.
Store in an area without drain or sewer access.
Provision to contain effluent from fire extinguishing.
Cool.
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Marine pollutant.
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 substance decomposes
on heating
producing toxic and corrosive fumes (hydrogen cyanide, hydrochloric acid, nitrogen oxides).
Reacts slowly with water or water vapour to form hydrogen chloride.
Occupational Exposure Limits:
TLV: 0.3 ppm; as (ceiling value) (ACGIH 1999).
MAK: IIb (not established but data is available) (DFG 2008).
OSHA PEL: none
NIOSH REL: C 0.3 ppm (0.6 mg/m3)
NIOSH IDLH: N.D. See: IDLH INDEX
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation.
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:
Tear drawing.
The substance severely
irritates
the eyes,
the skin and
the respiratory tract.
The substance may cause effects on the cellular respiration
, resulting in
convulsions
and
unconsciousness
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Exposure may result in death.
Medical observation is indicated.
See Notes.
Inhalation of the substance may cause lung oedema (see Notes).
The effects may be delayed.
Rapid evaporation of the liquid may cause frostbite.
Medical observation is indicated.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 13.8°C
Melting point: -6°C
Solubility in water: soluble
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Vapour pressure, kPa at 21.1°C: 1987
Relative vapour density (air = 1): 2.16
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Environmental
Data
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The substance is very toxic to aquatic organisms.
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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 is therefore essential.
Immediate administration of an appropriate spray, by a doctor or a person authorized by him/her, should be considered.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
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.
Transport Emergency Card: TEC (R)-801
Card has been partially updated in November 2008: see Occupational Exposure Limits,
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ADDITIONAL INFORMATION
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ICSC: 1053
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CYANOGEN CHLORIDE
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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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