Product Identification
【Product Name】1,2,4-1H-Triazole
【Synonyms】s-Triazole ；1,2,4-三氮唑
【CAS】288-88-0
【Formula】C2H3N3
【Molecular Weight】69.069999999999993
【EINECS】206-022-9
【RTECS】XZ3806000
【RTECS Class】Drug; Primary Irritant
【Merck】12,9735
【Beilstein/Gmelin】104767
【Beilstein Reference】5-26-01-00082
【EC Index Number】613-111-00-X
【EC Class】Toxic for reproduction Catery 3; Harmful; Irritant

Physical and Chemical Properties
【Appearance】Pale yellow crstals with a characteristic odor.
【Solubility in water】1250 g/L
【Melting Point】116-119℃
【Boiling Point】260℃
【Vapor Pressure】0.02 (25℃)
【Density】1.394 g/cm3 (25℃)
【pKa/pKb】10.18 (pKa)
【Partition Coefficient】-1.2
【Heat Of Vaporization】47.8 kJ/mol
【Heat Of Combustion】-1322 kJ/mol
【Usage】Used to produce antifungals.

First Aid Measures
【Ingestion】Get medical aid. Wash mouth out with water.
【Inhalation】Remove from exposure to fresh air immediately.
【Skin】Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
【Eyes】Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.

Handling and Storage
【Storage】Store in a cool, dry place. Store in a tightly closed container.
【Handling】Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.

Hazards Identification
【Ingestion】Harmful if swallowed. May cause irritation of the digestive tract.
【Inhalation】May cause respiratory tract irritation. May be harmful if inhaled.
【Skin】May be harmful if absorbed through the skin.
【Eyes】Causes eye irritation.
【EC Risk Phrase】R 22 36 63
【EC Safety Phrase】S 36/37

Exposure Controls/Personal Protection
【Personal Protection】Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
【Respirators】Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures
【Flash Point】140℃
【Autoignition】490℃
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.

Accidental Release Measures
【Small spills/leaks】Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity
【Disposal Code】3
【Stability】Stable under normal temperatures and pressures.
【Incompatibilities】Strong oxidizing agents.
【Decomposition】Hydrogen cyanide, nitrogen oxides, carbon monoxide, carbon dioxide, ammonia.

Transport Information
【HS Code】2933 99 90