The flame symbol alerts users that a chemical is flammable. It can also indicate a chemical may be pyrophoric, self-heating, self-reactive, or emit flammable gas. It may also indicate a chemical includes organic peroxides.

Flame: This pictogram warns you of anything flammable, be it gases, aerosols, liquids, or solids. Products with this pictogram can ignite by a spark, static discharge, or even a hot surface. Flame Over Circle: This is for materials that oxidize.

Flammable (Symbol: open flame) This symbol refers to any flammable chemicals or other substances that ignite on contact with air, a small ignition source, has a low flash point or can evolve highly flammable gases when in contact with water. The symbol is a large open flame.

Flammable Chemicals that may catch fire in contact with air, only need brief contact with an ignition source, have a very low flash point or evolve highly flammable gases in contact with water. This symbol replaces the old classifications of highly flammable and extremely flammable. The symbol is a flame.