Materials Which Use the Fire Symbol


There are three classes of materials which use the fire symbol.
1. Flammables can be gases, liquids or solids. Flammables ignite easily and burn rapidly. Liquid flammables have a flashpoint under 100 degrees Fahrenheit.
2. Combustibles are similar to flammables, but they do not ignite as easily. Liquid combustibles have a flash point above 100 degrees Fahrenheit.
3. Pyrophoric, or spontaneous combustion materials, burst into flames "on their own" at temperatures below 130 degrees Fahrenheit.