Toluene is a clear, colourless liquid with a benzene-like odour. It is a FLAMMABLE LIQUID AND VAPOUR. The liquid can accumulate static charge by flow or agitation. The vapour is heavier than air and may spread long distances and distant ignition and flashback are possible. Liquid can float on water and may travel to distant locations and/or spread fire. Toluene can decompose at high temperatures forming toxic gases. Closed containers may rupture and explode in heat of fire. Toluene is harmful if inhaled or swallowed and is a central nervous system depressant. The vapour may cause headache, nausea, dizziness, drowsiness, confusion and incoordination. Toluene causes skin and eye irritation. It is an aspiration hazard and swallowing or vomiting of the liquid may result in aspiration into the lungs.