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NIOSH

1,2,4-TRIAZOLE

ICSC: 0682

Pyrrodiazole
1H-1,2,4-Triazole
s-Triazole
C2H3N3
Molecular mass: 69.1
ICSC # 0682 		CAS # 288-88-0
RTECS # XZ3806000
EC # 613-111-00-X
April 18, 2007 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.
Powder, water spray, foam, 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 See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE.
AVOID ALL CONTACT!

•INHALATION
Local exhaust or breathing protection.
Fresh air, rest.
•SKIN
Protective gloves.
Remove contaminated clothes. Rinse skin with plenty of water or shower.
•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. Give one or two glasses of water to drink. Seek medical attention if you feel unwell

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Personal protection: particulate filter adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place
Separated from strong oxidants, and strong acids. Store in an area without drain or sewer access.

Xn symbol
R: 22-36-63
S: 2-36/37
Signal: Warning
Excl mark-Health haz
Harmful if swallowed
Causes eye irritation
Suspected of damaging fertility or the unborn child
Harmful to aquatic life
ICSC: 0682 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.

1,2,4-TRIAZOLE

ICSC: 0682

I

M

P

O

R

T

A

N

T


D

A

T

A

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. The substance decomposes on heating producing toxic fumes including nitrogen oxides, ammonia fumes Reacts with strong acids and strong oxidants .

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK 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 . 35, 33

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: 260°C

Decomposes at > 290 °C
Melting point: 120-121°C
Density: 640
kg/m3
Solubility in water, g/100 ml at 20°C: 125
Vapour pressure, Pa at 20°C: 0.2
Flash point: 170°C c.c.
Auto-ignition temperature: 490°C
Octanol/water partition coefficient as log Pow: -0.6

ENVIRONMENTAL
DATA

The substance is harmful to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal.

N O T E S

ADDITIONAL INFORMATION



ICSC: 0682 1,2,4-TRIAZOLE
(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.
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