Flash_Point                      Flash     AutoignitionFlammable
                                   Point     Temperature Limits
                                   (C)       (C)         Lower   Upper
                                                        (vol % at 25C)
                     methane       -188      630         5.0     15.0
                     ethane        -135      515         3.0     12.4
                     propane       -104      450         2.1     9.5
                     n-butane      -74       370         1.8     8.4
                     n-pentane     -49       260         1.4     7.8
                     n-hexane      -23       225         1.2     7.4
                     n-heptane     -3        225         1.1     6.7
                     n-octane      14        220         0.95    6.5
                     n-nonane      31        205         0.85    -
                     n-decane      46        210         0.75    5.6
                     n-dodecane    74        204         0.60    -
                     n-tetradecane 99        200         0.50    -