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