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IMIDAZOLE
ICSC: 1721
Peer-Review Status: 12.11.2008 Validated
1,3-Diaza-2,4-cyclopentadiene
1,3-Diazole
Glyoxaline
Miazole 
CAS #: 288-32-4 RTECS #: NI3325000
UN #: 3263
EINECS #: 206-019-2
    Formula: C3H4N2
Molecular mass: 68.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames.  Use water spray, foam, powder, carbon dioxide. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Prevent deposition of dust. Closed system, ventilation, explosion-proof electrical equipment and lighting.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE      
Inhalation Cough. Sore throat. Burning sensation.  Use local exhaust or breathing protection. Avoid inhalation of dust.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain. Serious skin burns.  Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer immediately for medical attention. 
Eyes Redness. Pain. Blurred vision. Temporary loss of vision.  Wear face shield or eye protection in combination with breathing protection if powder.  Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion Sore throat. Burning sensation in the throat and chest.  Do not eat, drink, or smoke during work.  Rinse mouth. Rest. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer immediately for medical attention. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Sweep spilled substance into covered containers. Then wash away with plenty of water.  Do not transport with food and feedstuffs. 
EC Classification
 
UN Classification
UN Hazard Class: 8; UN Pack Group: III 
GHS Classification
Signal: Danger
Harmful if swallowed
Causes severe skin burns and eye damage
Suspected of damaging fertility or the unborn child 
correxcl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong acids and food and feedstuffs. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-YELLOW CRYSTALS WITH CHARACTERISTIC ODOUR. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 

Chemical dangers
Decomposes on burning. This produces toxic fumes including nitrogen oxides. The solution in water is a weak base. Reacts violently with strong acids. 

Occupational exposure limits
TLV not established.
MAK (2b (not established but data is available)): (DFG 2007). 

Routes of exposure
The substance can be absorbed into the body by ingestion. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of short-term exposure
The substance is corrosive to the skin. The substance is severely irritating to the eyes. The substance is irritating to the respiratory tract. 

Effects of long-term or repeated exposure
Animal tests show that this substance possibly causes toxicity to human reproduction or development. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 268°C
Melting point: 89°C
Relative density (water = 1): 1.03
Solubility in water, g/100ml at 20°C: 63.3 (good)
Vapour pressure, Pa at 20°C: 0.3
Relative vapour density (air = 1): 2.35
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.0
Flash point: 145°C c.c.
Auto-ignition temperature: 480°C
Octanol/water partition coefficient as log Pow: -0.02
Viscosity: 2.617 mm²/s at 100°C 
 

NOTES
Card has been partially updated in April 2010: see Occupational Exposure Limits. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations
       Imidazole (SIDS)