Kethanol is a fictional gas produced by mining in the Caves of Despair in Ninjago. It is extremely flammable and explosive.
Zane identified a smelly gas as kethanol escaping from the basement of the Caves of Despair. Cole plugged the hole from which the gas escaped, causing the explosion and destruction of caves.
- The name of the gas is based on ethanol, a carbohydrate gas in alcoholic beverages.