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Flash Point - Fuels
Some common fuels and their flash points
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- The flash point of a chemical is the lowest temperature where enough fluid can evaporate 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 are indicated 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 |
- T(oC) = 5/9[T(oF) - 32]
The Auto-Ignition Temperature is not the same as Flash Point - The Auto-Ignition Temperature indicates the minimum temperature required to ignite a gas or vapor in air without a spark or flame being present.
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