Alcohol that exceeds 70% alcohol by volume must not be taken on a plane. Alcohol used for cleaning (e.g. isopropyl) or "rubbing" alcohol will likely exceed the 70% limit.
Note: International flights limit the amount of liquids you can pack in your carry-on - see Powders, liquids, aerosols, and gels for more information.
Some liquids are highly volatile and can have low combustion thresholds and can’t be taken onto planes because there is a risk of them exploding or catching fire harming people and property. It is not safe to take them on the plane.
You will be asked to relinquish all dangerous or prohibited items found in your carry-on luggage. If you refuse:
We x-ray bags going on planes to make sure there is nothing dangerous in them. If something comes up on the x-ray that needs checking, the bag will be opened, searched and any dangerous or prohibited item will be removed.