This is my suggestion for liquid fire it can:

Burn through weak materials 

Act as a smoke generator if placed in a cup

Do interesting reactions like change color of some materials 

Attributes:

Starts at 35 degrees 

Slowly heats up on its own with smoke 

Bursts into flames at 120 degrees 

Starts vaporing at 90 degrees 

Becomes dormant and semi solid at - 5 degrees 

It's a red glowing color 

Starts gelling at 10 degrees and lower 

Mainly for labs