Flash Point - Fuels

Some common fuels and their flash points

  • 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.

burning flames

Some fuels and their flash points at atmospheric pressure are indicated below:

FuelFlash Point
(oF)
Acetaldehyde -36
Acetone 0
Benzene 12
Biodiesel 266
Carbon Disulfide -22
Diesel Fuel (1-D) 100
Diesel Fuel (2-D) 126
Diesel Fuel (4-D) 130
Ethyl Alcohol, Ethanol 63
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
Jet fuel (A/A-1) 100 - 150
Kerosene 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]
Note! - 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.

Related Topics

  • Combustion - Boiler house topics - fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency

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