ICSC 0682 - 1,2,4-TRIAZOLE

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1,2,4-TRIAZOLE	ICSC: 0682 (April 2007)
s-Triazole Pyrrodiazole 1H-1,2,4-Triazole

CAS #: 288-88-0

EC Number: 206-022-9

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible. Gives off irritating or toxic fumes (or gases) in a fire. Finely dispersed particles form explosive mixtures in air.	NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.	Use water spray, powder, foam, carbon dioxide.

See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE. PREVENT DISPERSION OF DUST! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
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	CLASSIFICATION & 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.	According to UN GHS Criteria Harmful if swallowed Causes eye irritation Suspected of damaging fertility or the unborn child Harmful to aquatic life Transportation UN Classification
STORAGE
Separated from strong oxidants and strong acids. Store in an area without drain or sewer access.
PACKAGING

1,2,4-TRIAZOLE

ICSC: 0682

PHYSICAL & CHEMICAL INFORMATION
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.	Formula: C₂H₃N₃ Molecular mass: 69.1 Boiling point: 260°C Decomposes at 290°C Melting point: 120-121°C Density: 640 kg/m³ Solubility in water, g/100ml 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

PHYSICAL & CHEMICAL INFORMATION

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.

Formula: C₂H₃N₃
Molecular mass: 69.1
Boiling point: 260°C
Decomposes at 290°C
Melting point: 120-121°C
Density: 640 kg/m³
Solubility in water, g/100ml 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

EXPOSURE & HEALTH EFFECTS
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. Effects of short-term exposure The substance is irritating to the eyes.	Inhalation risk A harmful concentration of airborne particles can be reached quickly when dispersed. Effects of long-term or repeated exposure Animal tests show that this substance possibly causes toxicity to human reproduction or development.

EXPOSURE & HEALTH EFFECTS

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.

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

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

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

OCCUPATIONAL EXPOSURE LIMITS
MAK sensitization of skin (SH)

ENVIRONMENT
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

EC Classification
Symbol: Xn; R: 22-36-63; S: (2)-36/37

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