GHS Flame Pictogram

This pictogram indicates materials that may cause fires.   It includes the following categories of materials:  

1.  Flammables easily ignited, burns quickly
2.  Pyrophorics spontaneously igniting in air or water reactive
3.  Self-Heating spontaneously heats in air but not pyrophoric
4.  Emits Flammable Gas reacts with water to emit a flammable gas
5.  Self Reactives liable to undergo strongly exothermic decomposition but not explosive
6.  Organic Peroxides derivatives of hydrogen peroxide that undergo exothermic decomposition but not explosive