International Chemical Safety Cards

IMIDAZOLE ICSC: 1721
World Health Organization (WHO) International Labour Organization (ILO) United Nations Environmental Programme (UNEP) European Commission National Institute for Occupational Safety and Health (NIOSH)
1,3-Diaza-2,4-cyclopentadiene
1,3-Diazole
Glyoxaline
Miazole
C3H4N2
Molecular mass: 68.1
8 Corrosive placard ICSC #    1721
CAS #     288-32-4
RTECS # NI3325000
UN #        3263
November 12, 2008 Validated
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.
Water spray, foam, powder, carbon dioxide.
EXPLOSION Finely dispersed particles form explosive mixtures in air.
Prevent deposition of dust; closed system, dust 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.
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.
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 STORAGE 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.
Separated from strong acids and food and feedstuffs.
Do not transport with food and feedstuffs.
UN Hazard Class: 8
UN Packing Group: III
Signal: Danger
Corr-Excl mark-Health haz
Harmful if swallowed.
Causes severe skin burns and eye damage
Suspected of damaging fertility or the unborn child
SEE IMPORTANT INFORMATION ON BACK
ICSC: 1721 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards

IMIDAZOLE ICSC: 1721
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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:
The substance decomposes on burning producing 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: IIb (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 in which a harmful concentration in the air is reached on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the skin, is severely irritating to the eyes and 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
Boiling point: 268C
Melting point: 89C
Relative density (water = 1): 1.03
g/cm
Solubility in water, g/100 ml at 20C: 63.3
(good)
Vapour pressure, Pa at 20C: 0.3
Relative vapour density (air = 1): 2.35
Relative density of the vapour/air-mixture at 20C (air = 1): 1.0
Flashpoint: 145C c.c.
Auto-ignition temperature: 480C
Octanol/water partition coefficient as log Pow: -0.02
Viscosity, mm2/s at 100 C: 2.617
ENVIRONMENTAL
DATA

N O T E S
Transport Emergency Card: TEC (R)-80GC8-II+III.
Card has been partially updated in April 2010: see Occupational Exposure Limits.
ADDITIONAL INFORMATION


ICSC: 1721 IMIDAZOLE
(C) IPCS, CEC, 1994
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.