Sodium bicarbonate
Fire extinguisher

Sodium bicarbonate has several fire-extinguishing mechanisms that act simultaneously. It decomposes into water and carbon dioxide when heated, an endothermic reaction that deprives the fire of heat. In addition, it forms intermediates that can scavenge the free radicals which are responsible for the propagation of fire. With grease fires specifically, it also has a mild saponification effect, producing a soapy foam that can help smother the fire.
punctuation:no_comma