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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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 some common fuels below:
| Fuel or Chemical | Temperature | |
| (oC) | (oF) | |
| Acetaldehyde | 175 | 347 |
| Acetone | 465 | 869 |
| Acetylene | 305 | 581 |
| Benzene | 560 | 1040 |
| Bituminous coal | 300 | 572 |
| Butane | 420 | 788 |
| Carbon | 700 | 1292 |
| Carbon - bi sulfide | 300 | |
| Carbon monoxide | 609 | 1128 |
| Charcoal | 660 | |
| Coal-tar oil | 580 | 1076 |
| Coke | 700 | 1292 |
| Cyclohexane | 245 | 473 |
| Diethyl ether | 160 | 320 |
| Ethane | 515 | 859 |
| Ethylene | 490 | 914 |
| Ehtyl Alcohol | 365 | 689 |
| Fuel Oil No.1 | 210 | 410 |
| Fuel Oil No.2 | 256 | 494 |
| Fuel Oil No.4 | 262 | 505 |
| Heavy hydrocarbons | 750 | 1382 |
| Hydrogen | 500 | 932 |
| Gasoline | 280 | 536 |
| Gun Cotton | 430 | |
| Kerosine | 210 | 410 |
| Isobutane | 462 | 864 |
| Isobutene | 465 | 869 |
| Isooctane | 447 | 837 |
| Isopentane | 420 | 788 |
| Isopropyl Alcohol | 399 | 750 |
| Light gas | 600 | 1112 |
| Light hydrocarbons | 650 | 1202 |
| Methane (Natural Gas) | 580 | 1076 |
| Methyl Alcohol | 385 | 725 |
| Naphtha | 550 | 1022 |
| Neoheaxane | 425 | 797 |
| Neopentane | 450 | 842 |
| Nitro-glycerine | 490 | |
| n-Butane | 405 | 761 |
| n-Heptane | 215 | 419 |
| n-Hexane | 225 | 437 |
| n-Octane | 220 | 428 |
| n-Pentane | 260 | 500 |
| n-Pentene | 298 | 569 |
| Oak Wood - dry | 900 | |
| Peat | 227 | 440 |
| Petroleum | 400 | 752 |
| Pine Wood - dry | 800 | |
| Phosphorous, amorphous | 500 | |
| Phosphorous, transparent | 120 | |
| Production gas | 750 | 1382 |
| Propane | 480 | 842 |
| Propylene | 458 | 856 |
| p-Xylene | 530 | 986 |
| Rifle Powder | 550 | |
| Toluene | 530 | 849 |
| Semi anthracite coal | 400 | 752 |
| Styrene | 490 | 914 |
| Wood | 300 | 572 |
| Xylene | 463 | 867 |
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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