The Globally Harmonised System of Classification and Labelling of Chemicals (GHS) is a system for chemical hazard communication.
 
GHS Labels are used to minimize or prevent adverse effects caused by exposure to hazardous products.
 
It appears on chemical labels for substances that are:
Flammables–which are gases, aerosols, liquids, or solids that will burn or ignite under certain conditions,
Self-Reactives–heating alone, without air, may cause fire or explosion,
Pyrophorics–in small amounts, may ignite within 5 minutes after contact with air,
Self-Heating–which may catch fire only in large amounts and after long periods of time when exposed to air,
Emitters of flammable gas, and
Organic peroxides–which, when heated, may cause fire or explosion; may be sensitive to impact or friction; and may react dangerously with other chemicals.