What two things do diethyl ether, butadiene, diethylkatene, 2-propanol, and cyclohexene have in common? These chemicals can all be found in high school storage rooms and can all form dangerous peroxides. How dangerous are they? If the cap of an ether container has formed peroxides, just unscrewing it can cause an explosion! This month’s Safer Science column outlines some standard operating procedures that are recommended to control the hazards of peroxides.