IPCS INCHEM Home
1,2,4-TRIAZOLE
ICSC: 0682
Peer-Review Status: 18.04.2007 Validated
Pyrrodiazole
1H-1,2,4-Triazole
s-Triazole 
CAS #: 288-88-0 RTECS #: XZ3806000
EC #: 613-111-00-X
EINECS #: 206-022-9
 		    Formula: C2H3N3
Molecular mass: 69.1

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, powder, foam, carbon dioxide. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent deposition of dust.   
 
EXPOSURE See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE.  PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation   Use local exhaust or breathing protection.  Fresh air, rest. 
Skin   Protective gloves.  Remove contaminated clothes. Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL
 		PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered sealable containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.   
EC Classification
Symbol: Xn; R: 22-36-63; S: (2)-36/37 
UN Classification
 
GHS Classification
Signal: Warning
Harmful if swallowed
Causes eye irritation
Suspected of damaging fertility or the unborn child
Harmful to aquatic life 
excl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong oxidants and strong acids. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
BROWN SOLID IN VARIOUS FORMS WITH CHARACTERISTIC ODOUR. 

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

Chemical dangers
May explode on heating. Decomposes on heating. This produces toxic fumes including nitrogen oxides, ammonia and hydrogen cyanide. Reacts with strong acids and strong oxidants. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

Routes of exposure
The substance can be absorbed into the body in hazardous amounts by ingestion. The substance can be absorbed into the body by inhalation and through the skin. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of short-term exposure
The substance is irritating to the eyes. 

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: 260°C
Decomposes at 290°C
Melting point: 120-121°C
Density: g/cm³
Solubility in water, g/100ml at 20°C: 125
Vapour pressure, Pa at 20°C:
Flash point: 170°C c.c.
Auto-ignition temperature: 490°C
Octanol/water partition coefficient as log Pow: -0.6   		The substance is harmful to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
 

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