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1,2,4-TRIAZOLE ICSC: 0682
Date of Peer Review: October 1994

Pyrrodiazole
1H-1,2,4-Triazole
CAS # 288-88-0 C2H3N3
RTECS # XZ3806000 Molecular mass: 69.1
UN #
EC Index # 613-111-00-X
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.

EXPOSURE
PREVENT DISPERSION OF DUST! PREVENT GENERATION OF MISTS!
IN ALL CASES CONSULT A DOCTOR!
Inhalation
Local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
Skin
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Redness. Pain.
Safety goggles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion
Do not eat, drink, or smoke during work.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Personal protection: P2 filter respirator for harmful particles.
EU Classification
Symbol: Xn
R: 22-36-63
S: (2-)-36/37
UN Classification

EMERGENCY RESPONSE STORAGE

Separated from strong oxidants, acids.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
1,2,4-TRIAZOLE ICSC: 0682
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
BROWN SOLID IN VARIOUS FORMS, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic and irritating fumes including nitrogen oxides (see ICSC 0930). Reacts with strong acids and strong oxidants.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying or when dispersed, especially if powdered.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes. The substance may cause effects on the central nervous system, resulting in tremors, excitement and respiratory depression.

PHYSICAL PROPERTIES
Boiling point (decomposes): 260C
Melting point: 120-121C
Solubility in water, g/100 ml at 20C: 125
Flash point: 170.0C
Auto-ignition temperature: 490C
ENVIRONMENTAL DATA

NOTES
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. Card has been partly updated in October 2005. See section EU classification.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005