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There are 18 different isomers of "octane", i.e. C8H18. Most likely the question refers to either the straight chain n-octane or to isooctane - the octane that the "octane" rating of gasoline is based on.

For n-nctane:

Boiling Point: 126C (259F)

Melting Point: -57C (-71F)

For isooctane (2,2,4 trimethylpentane):

Melting point: -107 C

Boiling point: 98 C

If you are looking for one of the other 16 isomers of octane, you need to specify which one.

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14y ago

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