Flash Point - Fuels

• 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]