I would never take flamables on board it's broadly illegal, but i would leave the specifics to people who actually know the details. In a post shampoo world, who knows.
While I hate the waste of those butane stoves that have the compressed gas cartridges, I found the fuel widely available in euro. They are light and there really isn't any residual smell once the cartridges are burned off so you can pack the stove bit for the return trip, with few worries.
Anyway, have a great trip.