Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated.
Many liquids are lighter than water.
Inhalation or contact with material may irritate or burn skin and eyes. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution. Keep unauthorized personnel away. Keep out of low areas.