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Flash Point - Fuels

Common fuels and their flash points

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The flash point of a chemical substance 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:

See also Autoignition temperature and flash point of different hydrocarbons

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.
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  • en: flash point fuels temperature
  • es: flash de la temperatura del punto de los combustibles
  • de: Flammpunkt Brennstoffe Temperatur
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