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answered Mar 26, 2014 by anonymous

Following are the flammability limits of some of the key hydrocarbons.

Flammability Limit, vol%

 Hydrocarbon  Higher Combustion Limit  Lower Combustion Limit  Autoignition Temp., F
 Methane  15  5.0  999
 Ethane  13  2.9  950
 Propane  9.5  2.1  871
 i-Butane  8.5  1.8  —-
 n-Butane  9.0  1.5  806
 i-Pentane  8.0  1.3  —-
 n-Pentane  8.3  1.4  588
 n-Hexane  7.7  1.1  477
 n-Decane  5.4  0.7  >500
...