Like most fluorescent lamps, the All Clear bulb contains a small amount of mercury. The All Clear is engineered with a quartz shield that physically separates the bulb from the bottle and protects the bulb from both impact and temperature. The All Clear has been extensively field tested and lab tested which is why we back it with our Got Your Bak Lifetime Guarantee. In the unlikely event that the bulb were to chip or break, immediately place the cap and any broken pieces into an enclosed container and handle as “e-waste”. Discard at a local site that is authorized for ‘electronic waste disposal’. For more information, please see detailed instructions on the EPA website.