It needs to be saved inside of a dry inert gasoline atmosphere or anhydrous mineral oil to prevent the formation of a surface layer of potassium superoxide, a force-sensitive explosive that detonates when scratched. The resulting explosion usually starts a fireplace hard to extinguish.[61][62]Dung d?ch ???c b?m t? m?t b? ch?a ??n ??u cao h?n c?a c�