I filled a Zippo lighter with 2-propanol and it lit up easily when the ambient temperature was around 6-7 degrees Celsius.
It was impossible to light it up when the temperature was around 3-4 degrees Celsius. Then I put a drop of lighter fluid (naphtha) on the wick and it lit up first try. After the drop of naphtha was burned the lighter was heated up a bit and then it also sparked easily with the propanol.
The reported flash point of propanol is 12 degrees Celsius while the flash point of naphtha is 30-38 degree Celsius.
How can this be? Shouldn't be the flash point of naphtha lower than propanol recording to my "experiment" ?