Benzene is a clear, colourless liquid with a characteristic, aromatic hydrocarbon odour. It is a EXTREMELY FLAMMABLE LIQUID as well as its VAPOUR. Benzene can accumulate static charge by flow or agitation. Since benzene's vapour is heavier than air and may spread long distances, distant ignition and flashback are possible. Liquid can float on water and may travel to distant locations and/or spread fire. Benzene can decompose at high temperatures forming toxic gases. It is harmful if inhaled or swallowed and is a central nervous system depressant. The vapour may cause headache, nausea, dizziness, drowsiness and confusion. Benzene may cause blood and bone marrow effects, based on animal data. It can cause skin and eye irritation. It is also an aspiration hazard because swallowing or vomiting of the liquid may result in aspiration into the lungs. Benzene is considered a CANCER HAZARD - can cause cancer and a MUTAGEN - may cause genetic damage.