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Fuels and Chemicals - Auto Ignition Temperatures

The ignition point for some common fuels and chemicals butane, coke, hydrogen, petroleum and more

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burning flames

The Auto-ignition Temperature - or

"the minimum temperature required to ignite a gas or vapor in air without a spark or flame being present"

are indicated for common fuels and chemicals below:

Fuel or ChemicalAuto-ignition Temperature
Acetaldehyde 175
Acetic acid 427
Acetone, propanone 465
Acetylene 305
Anthracite - glow point 600
Benzene 560
Bituminous coal - glow point 454
Butadiene 420
Butane 405
Butyl acetate 421
Butyl alcohol 345
Butyl methyl ketone 423
Carbon 700
Carbon disulfide, CS2 90
Carbon monoxide 609
Charcoal 349
Coal-tar oil 580
Coke 700
Cyclohexane 245
Cyclohexanol 300
Cyclohexanone 420
Cyclopropane 498
Dichloromethane 600
Diethylamine 312
Diethylether 160
Diethanolamine 662
Diesel, Jet A-1 210
Diisobutyl ketone 396
Diisopropyl ether 443
Dimethyl sulphoxide 215
Dodecane, dihexyl 203
Epichlorohydrin 416
Ethane 515
Ethylene, ethene 450
Ethyl acetate 410
Ethyl Alcohol, Ethanol 365
Ethylene oxide 570
Fuel Oil No.1 210
Fuel Oil No.2 256
Fuel Oil No.4 262
Furfural 316
Heavy hydrocarbons 750
Heptane 204
Hexane 223
Hexadecane, cetane 202
Hydrogen 500
Gas oil 336
Gasoline, Petrol 246 - 280
Glycerol 370
Gun Cotton 221
Kerosene 295
Isobutane 462
Isobutene 465
Isobutyl alcohol 426
Isooctane 447
Isopentane 420
Isoprene 395
Isopropyl alcohol 399
Isophorone 460
Isohexane 264
Isononane 227
Isopropyl Alcohol 399
Light gas 600
Light hydrocarbons 650
Lignite - glow point 526
Magnesium 473
Methane (Natural Gas) 580
Methanol, Methyl Alcohol 470
Methyl acetate 455
Methyl ethyl ketone 516
Naphtha 225
Neoheaxane 425
Neopentane 450
Nitrobenzene 480
Nitro-glycerine 254
n-Butane 405
n-Heptane 215
n-Hexane 225
n-Octane 220
n-Pentane 260
n-Pentene 298
Oak Wood - dry 482
Paper 218 - 246
Peat 227
Petroleum 400
Pine Wood - dry 427
Phosphorus, amorphous 260
Phosphorus, transparent 49
Phosphorus, white 34
Production gas 750
Propane 455
Propyl acetate 450
Propylene, propene 458
Pyridine 482
p-Xylene 530
Rifle Powder 288
Triethylborane -20
Toluene 535
Semi anthracite coal 400
Semi bituminous coal - glow point 527
Silane < 21
Styrene 490
Sulphur 243
Tetrahydrofuran 321
Toluene 530
Trichloroethylene 420
Wood 300
Xylene 463

The flammable (explosive) range is the range of a gas or vapor concentration that will burn or explode if an ignition source is introduced. Limiting concentrations are commonly called the lower explosive or flammable limit (LEL/LFL) and the upper explosive or flammable limit (UEL/UFL).

Below the explosive or flammable limit the mixture is too lean to burn. Above the upper explosive or flammable limit the mixture is too rich to burn. The Auto-Ignition Temperature is not the same as Flash Point - The Flash Point indicates how easy a chemical may burn.

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