Dicyanodiamide
Cyanoguanidine
Dicyanediamide
NH2(NH)CNHCN / C2H4N4
Molecular mass: 84.1
ICSC # 0650
CAS # 461-58-5
RTECS # ME9950000
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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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PREVENT DISPERSION OF DUST!
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•Inhalation
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Local exhaust.
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Fresh air, rest.
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•Skin
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Protective gloves.
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Rinse skin with plenty of water or shower.
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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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Rinse mouth.
Give plenty of water to drink.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting,
then remove to safe place.
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Separated from
strong oxidants,
strong acids.
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Important Data
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Physical State; Appearance:
WHITE
CRYSTALLINE POWDER.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
producing toxic gases includingammonia - see ICSC 0414.
Reacts
violently with strong oxidants, such as ammonium nitrate
causing fire and explosion hazard.
Reacts with acids to produce toxic gases including hydrogen cyanide. See ICSC 0492.
Occupational Exposure Limits:
TLV not established.
MAK: IIb (not established but data is available) (DFG 2005).
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation
and
by ingestion.
Inhalation Risk:
Effects of Short-Term Exposure:
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Melting point: 211°C
Density: 1.4
g/cm3
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Solubility in water, g/100 ml at 25°C: 4.13
Octanol/water partition coefficient as log Pow: -1.5 (estimated)
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Environmental
Data
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N O T E S
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In solution the substance decomposes above 80°C yielding ammonia (see ICSC 0414).
Card has been partly updated in October 2005. See section Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 0650
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DICYANDIAMIDE
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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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