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Engineering ToolBox > Flash Point - Fuels
The flash point of a chemical is the lowest temperature where it will evaporate enough fluid to form a combustible concentration of gas. The flash point is an indication of how easy a chemical may burn. Materials with higher flash points are less flammable or hazardous than chemicals with lower flash points.
Fuels and their flash points at atmospheric pressure can be found in the table below:
| Fuel | Flash Point (oF) |
| Acetaldehyde | -36 |
| Acetone | 0 |
| Benzene | 12 |
| Carbon Disulfide | -22 |
| Diesel Fuel (1-D) | 100 |
| Diesel Fuel (2-D) | 125 |
| Diesel Fuel (4-D) | 130 |
| Ethyl Alcohol | 55 |
| Fuels Oil No.1 | 100 - 162 |
| Fuels Oil No.2 | 126 - 204 |
| Fuels Oil No.4 | 142 - 240 |
| Fuels Oil No.5 Lite | 156 - 336 |
| Fuels Oil No.5 Heavy | 160 - 250 |
| Fuels Oil No.6 | 150 |
| Gasoline | -45 |
| Gear oil | 375 - 580 |
| Iso-Butane | -117 |
| Iso-Pentane | less than -60 |
| Iso-Octane | 10 |
| Kerosine | 100 - 162 |
| Methyl Alcohol | 52 |
| Motor oil | 420 - 485 |
| n-Butane | -76 |
| n-Pentane | less than -40 |
| n-Hexane | -7 |
| n-Heptane | 25 |
| n-Octane | 56 |
| Naphthalene | 174 |
| NeoHexane | -54 |
| Propane | -156 |
| Styrene | 90 |
| Toluene | 40 |
| Xylene | 63 |