Dicyanogen
Ethanedinitrile
Oxalonitrile
C2N2
Molecular mass: 52.04
(cylinder)
ICSC # 1390
CAS # 460-19-5
RTECS # GT1925000
UN # 1026
EC # 608-011-00-8
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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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Highly flammable.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames, NO sparks, and NO smoking.
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Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with
dry powder,
carbon dioxide.
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Explosion
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Gas/air mixtures are explosive.
Risk of fire and explosion on contact with strong oxidants.
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Closed system, ventilation, explosion-proof electrical equipment and lighting.
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In case of fire: keep cylinder cool by spraying 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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Convulsions.
Cough.
Dizziness.
Headache.
Laboured breathing.
Sore throat.
Unconsciousness.
Vomiting.
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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.
No mouth-to-mouth artificial respiration.
Refer for medical attention.
See Notes.
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•Skin
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ON CONTACT WITH LIQUID: FROSTBITE.
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Cold-insulating gloves.
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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.
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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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Spillage Disposal
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Storage
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Packaging & Labelling
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Evacuate danger area!
Consult an expert!
Ventilation.
Remove all ignition sources.
NEVER direct water jet on liquid.
Personal protection:
gas-tight chemical protection suit including self-contained breathing apparatus.
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Fireproof.
Cool.
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F symbol
T symbol
N symbol
R: 11-23-50/53
S: 1/2-23-45-60-61
UN Hazard Class: 2.3
UN Subsidiary Risks: 2.1
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Important Data
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Physical State; Appearance:
COLOURLESS
GAS
OR COMPRESSED LIQUEFIED GAS
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
The gas is heavier than air
and may travel along the ground; distant ignition possible.
Chemical Dangers:
On combustion, forms.
toxic gases
,
including
hydrogen cyanide
,
carbon monoxide
and
nitrogen oxides
.
Reacts with strong oxidants
causing fire and explosion hazard.
The substance reacts with acids forming highly toxic gases such as hydrogen cyanide.
Occupational Exposure Limits:
TLV: 10 ppm as TWA; (ACGIH 2008).
MAK: 5 ppm, 11 mg/m3
Peak limitation category: II(2);
skin absorption (H);
Pregnancy risk group: D;
(DFG 2008).
OSHA PEL: none
NIOSH REL: TWA 10 ppm (20 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:
The substance
is irritating to
the eyes
and
the respiratory tract
.
Rapid evaporation of the liquid may cause frostbite.
The substance may cause effects on the
central nervous system
, resulting in respiratory failure and collapse.
Exposure far above the OEL may result in death.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: -21.2°C
Melting point: -27.9°C
Relative density (water = 1): 0.95 at -21°C
Solubility in water, ml/100 ml at 20°C: 450
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Relative vapour density (air = 1): 1.8
Flash point: Flammable Gas
Explosive limits, vol% in air: 6.6-42.6
Octanol/water partition coefficient as log Pow: 0.07
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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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Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
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.
Card has been partly updated in April 2005. See sections Emergency Response.
Transport Emergency Card: TEC (R)-20G2TF
NFPA Code: H4; F4; R2;
Card has been partially updated in February 2009: see Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 1390
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CYANOGEN
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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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