Are cigarette ashes flammable

Answer 1

No, because flammable means "capable of being easily ignited and of burning quickly", and the ashes are the remnant of material which has already been burnt upand generally cannot burn any further because the flammable material has already oxidized.

Of course, the ashes can still be dangerous if they're hot, and can cause other material to catch fire, but that's because the ashes are hot, and the other material is flammable and that other material can catch fire if the ashes are hot enough, not because the ashes themselves are flammable.

However, if some flammable material, like cloth, is heated without being in the presence of air, as in a closed container, the hydrogen will be split from the material and vented away as a gas, leaving a matrix of carbon, and the remaining "char cloth" can be used as tinder in a survival kit to easily catch fire from sparks from a fire starter or from a coal produced by friction.

Answer 2

Yes, cigarette ashes are flammable. They can ignite easily when exposed to a heat source or a flame. It's important to properly dispose of cigarette ashes to prevent fire hazards.