[hotrod]

In a tightly sealed can it should last a very long time.

It would be good practice to run it through a filter incase you have any corrosion in the can (assuming its metal). Unlike Gasoling alcohol should not form a varnish or other deposits you have to worry about.

If it is a very low concentration of alcohol you might get some sort of slime, sludge or mold growing in there so again simple common sense checks like filtering or pouring into a clear bottle and check to see it is clear and does not have crud floating in it.

Larry